Doc 0000173965

The image displays a digital graphic, not a declassified document page itself. It features a stylized image of a bank vault on the left side and bold, white text on a black background on the right. The text announces "THE BLACK VAULT" and provides information about a document obtained from their online database of declassified government documents, specifically the MKULTRA/Mind Control Collection. It also includes a URL for downloading the collection. There are no photographs, handwritten annotations, official stamps, forms, diagrams, tables, redactions, or visual evidence of experimental procedures present on this graphic. r.· ! j AN EXPERIMENTAL INVESTIGATION OF THE ELECTRIC FISH SENSORY AND DATA PROCESSING SYSTEMS DESIGNED TOWARD DEVELOPING PHYSICAL ANALOGS FOR IL.-\RD\VARE PROTOTYPES HAv -!NG SThULAR CAPABILITIES· ' · . :~ \ 2 October 1973 - ----------~ --- : Experiments Needed to Assess Sensitivity, Range and Effective ness of the Electric Fishes to Detect Objects and Communicate Underwater We consider it necessary to perform a number of experiments de to _quantify of the electric fish Four si~ed so~e prop~rties. differen~. species of electric fishes have been considered for these experiments be cause of their basically different systems used as tranSmitters arid electro receptors. These fishes are: a. Gymnarchus niloticus .An African weakly fresh-wat_er electric fish.with a:. mediu~- -~ .. fixed frequency(266 to 300Hz) and a composite wavefor.ni." . Frequ~ncy·. . . . . . ·. . .. . - . . .. .. does not change with ter.1:;:rature. It has about seven kinds ·of electro~ re·ceptors plus displacement, acoustic an~ <:hemical_ se~ors located on ·_ or near ·t:he skin.· Electro~eceptors are located on the whole body. but ·are more numerouS near and on the· head and near its \-t::..-y po!nted tail. · ·: · ... . .. Countries or origin Sudan, Nigeria and Ivory Coast and the two Congos . of Africa. It can grow to a maximum size of 5 feet' and has' a life span of about 40 years. The electric organ is located caudally occupying about 1/2 to 2/3 of the fish length. Electric organ is derived from modified muscle spindels. Difficult to obtain and to keep alive. Has strange parasitic diseases affecting the spinal cord. The fish is blind and has only vestigial eyes. b. Sternarchus albifrons A South-American weakly fresh-water electric fish with a high, relatively fixed frequency (700 -800 kHz) and a composite waveform. The rate of discharge is temperature dependent at a rate of between 40 1 : to 60 Hz per degree centigrade. Has at least three kinds of electro receptors plus displacement, acoustic and chemical sensors located on or near the skin. Electroreceptors are located on the whole body and preferentially on or around the head. Counties of origin: Brazil, Columbia, Venezuela, Guyanas, Argentina, Bolivia, Ecuador, Peru I in South-America and some parts of Central America. Can grow to a maximum size of one foot. Life span is at least 10 years. The electric organ is located candally occupying about 2/3 This page is primarily text-based, featuring a title boxed in the upper half of the page and a date below. The text box contains a title in all capital letters and a smaller line of text below it. Below the main text block is the date "2 October 1973". In the lower right corner, there is a handwritten annotation enclosed in a circle, reading "257". There are no photographs, stamps, forms, diagrams, tables, redactions, or visual evidence of experimental procedures. on or around the head. Counties of origin: Brazil, Columbia, Venezuela, Guyanas, Argentina, Bolivia, Ecuador, Peru I in South-America and some parts of Central America. Can grow to a maximum size of one foot. Life span is at least 10 years. The electric organ is located candally occupying about 2/3 of the fishs' body length. The electric organ is derived from modified nervous tissue. It is a hardy species, easy to maintain and easy to procure. This fish is also blind and has vestigial eyes. c. Gymnotus carapo A South-American weakly fresh water electric fish with a medium · · low variable frequency (30 to 150 Hz) and a composite wave form. Has multiple electro and sensory receptors located on or near the skin. Electroreceptors are located on the whole body and preferenti ally on or near the head. Counties of origin same as for Sternarchus albifrons. Can grow to a maximum size of one and a half feet. Life span is several years. The electric organ is located caudally occupying about 1/2 of the fishs' body length. The electric organ is derived from modified muscle spindels. It is a hardy species but is not as easy to procure as Sternarchus. d. Gnathonemus petersii An· African weakly fresh-water electric fish with a low variable pulse -form repetition rate signal (5 to 170 pps). Has multiple ampullary and tuberous electroreceptors and sensory receptors located on the body 2 and preferentially on or near the head. Counties of origin located in the subtropical, tropical and equatorial Africa. Can grow to a maximum size of one foot. Life span may be several years. The electric organ is located in the tail and is derived "from . modified muscle tissue. (It is relatively easy to procure, but is very difficult to maintain it alive for longer periods of time in captivity.) For all experiments we will use a fiberglass water tank of 12 ft diameter and 4 ft height. E},.--periment #1 (B) This experiment is designed to establish the ability of an electric fish of tl:c species mentioned under (a) and (b) to detect metallic or non metallic objects having different masses and introduced in the water tank at different distances from the fish. The fish will be held in a position A by a vertical nylon net. The nylon-net will be raised and the object intro duced at position B. The time until The image is a scanned page from a document with typed text and no photographs, diagrams, or handwritten annotations. The text discusses experiments involving electric fishes, detailing their properties and origins. There are no stamps, forms, tables, or redacted content visible on this page. The document appears to be a factual report or academic writing focusing on scientific research. metallic or non metallic objects having different masses and introduced in the water tank at different distances from the fish. The fish will be held in a position A by a vertical nylon net. The nylon-net will be raised and the object intro duced at position B. The time until the fish will detect the object will be noted by observing the fish which may retract or advance in the direction of the object, depending on the and mass of the object and on .~omposition the species of the fish. This experiment will be repeated after lining the interior of the tank with aluminum foil (see Fig. 1). The objects con sidered are: iron, stainless steel (non-magnetic), wood, plexiglass, each in different dimensions (like 10 em x 2 em; 5 em x 1 em; 2 em x 0. 5 em; etc). The objects will be fixed to a nylon thread and introduced vertically into the tank. Experiment #2 (B) This experiment is designed to assess the capability of-electric fishes to use their navigation system to avoid obstacles like fine nylon 3 . ..__. . .,.--·-~---·..,...·r r.....,...,..,,._.---·~-.--...---..... ----,..-,__..,_., __~ .------ _..,_ . ., .• --..-·~-·--·-~-----,.......·-·-·-·•·•··-•-··--~·---• ·---·---·-·-.-. ---·-·---~-~-·-• ·~-- •·- ··-·-. ·-···-- -- ....... . ~ .l j l 1 t I t ....---Water Tank 12 ft Q and 4 ft high r made of fiberglass r to be I:1troduced l:::l~-+---~~--Object Position "B" Fig. 1. The reaction time of the fish will be plotted against different masses of the same material type of object and for the same mass of dif ferent kind of object materials. A short film may be made to illustrate the reaction of the fish. 4 g thread or fine wire (aluminum~ copper cannot be used because copper I even in minute quantities will kill these fishes. Again we will use fishes of the species mentioned under (a) and (b). Gymnarchus niloticus is an l air breather and cannot be confined in a tube but it can be used in experi ments with free swimming fishes. It is also a small goldfish eater. This fish will be put in the tank at the point "A" (see Fig. 2) behind a nylon net. A double net will divide the tank. A goldfish will be put in a nylon net bag and introduced in the tank at point ''B" after the nylon net holding the electric fish has been removed. in the tank at the point "A" (see Fig. 2) behind a nylon net. A double net will divide the tank. A goldfish will be put in a nylon net bag and introduced in the tank at point ''B" after the nylon net holding the electric fish has been removed. The reaction of the fish and the avoidance of the net will be observed and filmed. The fish species type (b) Stern archus albifrons is not a fish eater but usually reacts with an escape to a metallic object. In this case a metallic object will be used to force the fish to cross the double net. Its avoidance of the obstacles will be noted and filmed. Both fishes are blind. The experiment will be repeated using a grounded aluminum foil along the inner wall of the water tank. Experiment #3 (B) This experiment is designed to demonstrate the ability of electric fish to detect a magnetostatic field. The arrangement will be similar with experiment #1 but instead of using an object in the water we will use a permanent magnet outside the tank. Magnets of 10 kG, 1 kG, and 500 G, will be used at distances of 3ft from the tank wall or near the tank wall at Po"sition "B" or "C". The fish will be located at position "A" behind a nylon net (see Fig. 3). The magnetic field in the tank will be measured with a Hall-effect-probe and a Gaussmeter. The reaction of the fish to the magnetlc field will be noted and filmed. The threshold of detection of 5 . ____ .. ___________ .,. ____ .... -----·--------- ... ~----·-- .. ------·---------------·----· -·- ~- --- -----····-·--·- J l I Electric Fish ! Position "A" Nylon Net (Can be removed) ---1-------.. Eventual direction of fish moving toward the 1 \4---Water Tank prey at "B" Fiberglass 12ft cb x 4ft --------------- Nylon Nets Gold Fish Position ''B" i !i I I I lilllili lil ilili I I I I I I I I I I I I I I I I I I I I I I I I I I I I I --11 --1I --I ,~ -' --1--.L - Figure 2. 6 the magnetic field by different fishes of the same species and of the average of different species will be plotted one against each other. The magnet will be also moved from ''D" to "E" The document is a typed page from a declassified report, likely scientific in nature, detailing different species of electric fish. There are no photographs, stamps, or handwritten annotations visible on the page. The text discusses biological characteristics, origins, and electric organ functions of these fish, specifically mentioning *Gymnotus carapo* and *Gnathonemus petersii*. The content is structured as a list with sub-points (c. and d.). There is a page number "2" at the bottom right. The content appears to be a factual description of research subjects rather than experimental procedures. This page contains typed text, consisting of an introduction to an electric fish experiment. There are no photographs, handwritten annotations, official stamps, forms, diagrams, schematics, organizational charts, tables, structured data, or redactions visible on this page. The text itself describes experimental procedures and equipment, specifically mentioning a fiberglass water tank, nylon net, and various objects used in the experiment, but these are described textually and not visually represented. I I I I I I --11 --1I --I ,~ -' --1--.L - Figure 2. 6 the magnetic field by different fishes of the same species and of the average of different species will be plotted one against each other. The magnet will be also moved from ''D" to "E" and the reaction of the fish observed. lectric Fish Position "A" Fiberglass Water Tank 12 ft Q 4 ft high X "D" Direction of/ Movement ~ Figure 3. The sensitivity of electroreceptors will be calculated, counting the number of electroreceptors per square em and plotting it against the minimum magnetic field gradient that could be detected by the fish. 7 Experiment #4 (B) This experiment is designed to demonstrate the ability of electric fishes to detect electrostatic fields. The arrangement for this experiment will be similar to the preceding experiment, #3, but instead of a permanent magnet we will use a sphere charged electrostatically to 100, 200, 400, and 1000 ESU and isolated on a teflon and plexiglass support. The gradient of the field generated by the charged sphere in the tank will be calculated. The threshold of reaction of the electric fishes {different fishes of the same species and different species) will be established (see Fig. 4). Electric Fish Position "A" Fiberglass Water Tank 12 ft ~ X 4 ft high "D"O Direction of\ Movement \ 1-4---__,.-E ectrostatically Charged Sphere Position "C" Figure 4. 8 .· The threshold of detection of the electrostatic field (stationary or moving) of different fishes of the same species against each other and the average of different species against each other will be plotted. The sen sitivity of the electroreceptors will be calculated, counting the number of .electroreceptors per square em and plotting it against the minimum electro static field gradient that could be detected by the fish. Experiment #5 (B) This experiment is designed to assess the ability of electric fish to detect DC, AC repetitive signals, square wave and transient signals. The fish will be positioned behind a nylon net in the tank. Carbon elect rodes will be put in the tank at the opposite end of the tank at one feet apart (see Fig. 5). The four experiments to be performed are as follows: a. DC signals will be applied with a telegraph key monitored by # an oscilloscope and attenuated by potentimeter and furnished by DC bat- teries. A resistance The image displays a diagram illustrating an experimental setup. A circular tank labeled "Water Tank" is depicted, with dimensions of "12 ft o and 4 ft high made of fiberglass." Within the tank, there's a representation of an "Electric Fish Position 'A'" and a "Nylon Net (Can be moved vertically)." An "Object to be Introduced Position 'B'" is also indicated. A caption below the diagram, labeled "Fig. 1," describes the purpose of plotting fish reaction times against different masses and materials. Vertical lines of what appear to be page-turn indicators are present on the left margin. A page number "4" is visible at the bottom right. at the opposite end of the tank at one feet apart (see Fig. 5). The four experiments to be performed are as follows: a. DC signals will be applied with a telegraph key monitored by # an oscilloscope and attenuated by potentimeter and furnished by DC bat- teries. A resistance in series will limit the current (see Fig. 6). The reaction and threshold detection of the electric fish of the applied current/ and voltage will be noted. The gradient of the current will be calculated and a measurement of the voltage at the position where the fish will be put .will be made prior to putting the fish in the tank with two carbon electrodes one foot apart. The threshold detection of the different fishes of the same species will be plotted one against another and the average of different species will be plotted also each against another. f b. The same procedure will be used to find the threshold of de I tection of AC sinusoidal current for frequencies of 5, 10, 20, 50, 100, 200, I I 500, 1000, 2000, 5000, and 10,000 Hz (see Fig. 7). The signals will be ap plied with nonpolarizable Ag, AgCl electrodes and measured with the same kind of electrodes. Also frequencies close to the fishes own frequency will be used. 9 c. Square waves of same repetition rate as the sinusoidal currents will be used and applied with Ag, AgCl electrodes. d. The transients will be applied With the help of a network using a pulse transformer, resistors and a charged capacitor (see Fig. 8}. The values will be calculated and the resulting waveforms will be measured with an oscilloscope. These signals will be applied also with Ag, AgCl electrodes. The reaction and threshold of detection of the signals Will be noted and plotted the same way as for DC current. Fiberglass Water Electrodes for measurement Tank of applied current attenuated 12 ft Q X 4 ft high by the water in the tank Electrodes for Applying Different Currents and Signals Figure 5. 10 Carbon Electrodes 1ft apart 1 em free ends Oscilloscope ._____, = B Battery (optimum voltage will be determined by experi ments but tentatively set between 2 and 6 volts) = Potentiometers calculated to have constant impedance together with R1 =resistor to correspond to the im~ pedance of the carbon electrodes in water measured with the AC liquid ends Oscilloscope ._____, = B Battery (optimum voltage will be determined by experi ments but tentatively set between 2 and 6 volts) = Potentiometers calculated to have constant impedance together with R1 =resistor to correspond to the im~ pedance of the carbon electrodes in water measured with the AC liquid impedance bridge · C and R = capacitor and resistor to suppress sparks when the 2 key is manipulated k = key (telegraph type) Fig. 6. DC signal system. 11 Transmitting Electrodes Receiving Electrodes in the \Vater in the Water Ag, AgCl Waveform Impedance Ag, AgCl Generator Adapter 0 0 ...... w Oscilloscope Oscilloscope Fig. 7. Set-up for sinusoidal AC and square waves. To battery + for charging Shielded Cable the capacitor Ag, AgCl Electrode. in \Vater .___...J Oscilloscope = High capacity tantalitic capacitor (value to be experi- cl mentally established according to the imped:lnce of the electrodes in the water) = Spark suppressing networks C2R3;C3R4 = Variabl:? !'esistors to adapt the circuit to the Ag-AgCl Rl, R2 electrod;;s in the water Jack for peak current measurement (with a resistor J = in series and an oscilloscope in parallel) = Pulse transformer Tl Fig. 8. Transient generating set-up. 13 .. . I l Experiments #l(P), 3(P), 4(P), and 5(P) l These experiments will be similar to the experiments l(B), 3(B), 4(B) ~ 5B but instead of using free swimming fishes we will use fishes of species l mentioned in "C" and ''D" on page 2 like Gymnotus carapo and Gnothonemus p_etersii or equivalents restrained in a plexiglass tube with holes and two · I E.i~:.inless steel electrodes at the end (see Fig. 9). Instead of observing the reaction of the electric fish to the different stimuli, we Will monitor on the r oscilloscope and frequency counter the charging rate, amplitude and wave form of the fish response to the stimuli. The latency and habituation will be noted. This time the graphs will show the re ration between stimulus and response and also the threshold of reaction. With this species of fish and system a better quantification is possible of the ability of fish to detect ob jects, magnetic fields, electrostatic fields, DC currents, AC repetitive sinusoidal or squarewave signals and transient signals. Plexiglass tube with fish in it and electrodes at the end Fiberglass Water Tank 12 ft Q 4 ft high X . Amplifier 0 sc11 1 oscope F~:~~=~cy The document is a single page of text, appearing to be a declassified report or research paper. There are no photographs, handwritten annotations, stamps, forms, diagrams, or tables visible on this page. The text is centered on the page with a clear header for an experiment. There are no visible redactions or obscured content. The visual presentation is purely textual information detailing experimental procedures. ability of fish to detect ob jects, magnetic fields, electrostatic fields, DC currents, AC repetitive sinusoidal or squarewave signals and transient signals. Plexiglass tube with fish in it and electrodes at the end Fiberglass Water Tank 12 ft Q 4 ft high X . Amplifier 0 sc11 1 oscope F~:~~=~cy Object to be Electrodes for Experiment *O(P: .A detected, E:-.."}Jeriment # l(PV ~ Permanent magnet, Electrostatically charged sphere, Experiment i! 3(P) Experiment # 4{P) Figure 9. 14 .. Experiment # 6 This experiment is designed to relate the ability of electric fishes to communicate underwater and the distance at which they can manage it (see Fig. 10). The natural noise and the signal strength of the fish will be measured. The original signal will be recorded with electrodes on a magnetic tape recorder and monitored on an oscilloscope. This signal will be played back with the aid of two carbon electrodes in the tank at a place "!"at the distance "l" from the fish situated at the point "g" and confined there with a nylon net. The reaction of the fish to its own signal will be observed and eventually filmed. The signal will be subsequently attenuated to precalculated attenuations corresponding to distances of 100 ft, 500 ft, 1000 ft and 5000 ft. If the fish will not react to a certain attenuation a variable attenuation in between the fixed points will be used to assess the distance at which the fish can detect its own signal. Also later noise will be introduced in the form of white noise and its effect on the ability of the fish to detect its own signal will be observed. At the end graphs will be plotted for the signal to noise ratio versus distance of signal detection. The field generated by electric fish will be calculated and th~_ plotted on a graph. The experiments #lB, 2B, and 3B will be made in the fiberglass tank as it is and with aluminum foil set around the inner \Vall of the tank and grounded. The results with or without the grounded aluminum-foil will be plotted on graphs and eventually graphs will be plotted for the differ ences in results with and without grounded aluminum foil. 15 Receiving Electrodes Ag, AgCl Nylon Net . Amplifier 0 sc1 11 oscope Fiberglass Water Tank 12 ft Q X 4 ft high Transmitting Electrodes Ag, AgCl Oscilloscope Amplifier FM. The page contains a diagram illustrating an experimental setup for observing fish behavior. The central element is a circular "Water Tank" with labels indicating "Electric Fish Position 'A'" and "Gold Fish Position 'B'" within a "Nylon Bag." The diagram also shows "Nylon Nets" within the tank and an arrow indicating the "Eventual direction of fish moving toward the prey." Below this, there are two separate drawings: one of a rectangular structure labeled "Position of Wire Nets," and another of a grid-like object. The diagram is titled "Figure 2." and the page number "6" is visible at the bottom. There are no photographs, handwritten annotations, or official stamps present. This page features a diagram labeled "Figure 3" illustrating an experimental setup. The diagram shows a circular Fiberglass Water Tank with a fish depicted at "Electric Fish Position 'A'" inside. A Nylon Net is also visible within the tank. Positions labeled "B" and "C" in relation to a "Permanent Magnet" are indicated outside the tank. Text at the top discusses plotting magnetic fields and observed fish reactions, while text at the bottom describes how electroreceptor sensitivity will be calculated. There are no photographs, stamps, or handwritten annotations present. on graphs and eventually graphs will be plotted for the differ ences in results with and without grounded aluminum foil. 15 Receiving Electrodes Ag, AgCl Nylon Net . Amplifier 0 sc1 11 oscope Fiberglass Water Tank 12 ft Q X 4 ft high Transmitting Electrodes Ag, AgCl Oscilloscope Amplifier FM. Tape Recorder Electric Fish Position G Fiberglass Water Tank 12 ft Q X 4 ft high Transmitting Electrodes Ag, AgCl, Position E Oscilloscope Amplifier F1v1 Tape Recorder Impedance Network Figure 10. 16 Experiment # 7 In this experiment the electromagnetic field around some electric fishes (the ones which can be confined in a tube) will be measured and compared with values resulting from the calculated field. Electric Fish AgCl Electrodes Electrodes Ag, AgCl Moved in the Direction to the Center Oscilloscope "V Amplifier 0 _ .__ ___, Oscilloscope Figure 11. 17 The image is a scanned page from a document containing a diagram and accompanying text. The text describes an experiment involving electric fish and electrostatic fields. The diagram depicts a circular fiberglass water tank with various labeled positions and elements, including an "Electric Fish Position 'A'", a "Nylon Net", a "Fiberglass Water Tank", positions "B", "C", "D", and "E", and an "Electrostatically Charged Sphere". The diagram also indicates the "Direction of Movement" towards position "D". There are no photographs, stamps, or handwritten annotations visible on the page. The visual content illustrates the experimental setup described in the text. The image is a scanned page of a typewritten document with a single, small, black number "9" at the bottom center, indicating it's page nine of a larger document. There are faint horizontal lines stretching across the page, suggesting it might have been scanned from a lined notebook or paper. Several faint, vertical lines appear on the left side of the page, likely artifacts from the scanning process or previous binding. The text itself describes experimental procedures for measuring the electroreception abilities of fish. No photographs, stamps, handwritten notes, diagrams, or redacted content are visible. The page displays text describing experimental procedures and a diagram. The diagram, labeled "Figure 5," illustrates two circular tanks, likely representing fiberglass water tanks, with dimensions indicated. Various components are depicted, including electrodes, a nylon net, and a fish, suggesting an experiment involving aquatic environments and electrical stimuli. An annotation points to "Electrodes for Applying Different Currents and Signals." The page also includes page number "10" at the bottom. There are no photographs, handwritten annotations, stamps, forms, or redacted content visible on this page. This declassified document page displays a technical schematic diagram labeled "Fig. 6. DC signal system." The diagram illustrates a circuit with components including a battery (B), potentiometers (P1, P2, P3), a capacitor (C), resistors (R1, R2), a key (K), carbon electrodes, and an oscilloscope, all connected via shielded cabling. Text annotations below the diagram define these components. A page number "11" is visible at the bottom center, and a horizontal line of text, potentially a classification marking or routing information, is present at the very bottom edge. No photographs, handwritten annotations, official stamps, or filled-in forms are visible on this page. The page displays a schematic diagram illustrating an experimental setup. The diagram shows interconnected components labeled "Waveform Generator," "Impedance Adapter," and two sets of electrodes ("Transmitting Electrodes" and "Receiving Electrodes") placed "in the Water" and identified as "Ag, AgCl." Oscilloscopes are connected to observe the signals. The diagram is accompanied by a figure caption, "Fig. 7. Set-up for sinusoidal AC and square waves." The number "12" is also visible, presumably a page number. There are no photographs, handwritten annotations, stamps, forms, or redations visible on this page. The image displays a technical schematic diagram labeled "Fig. 8. Transient generating set-up." The diagram illustrates an electronic circuit with various components, including capacitors (C1, C2, C3), resistors (R1, R2, R3, R4), a pulse transformer (T1), and switches. It also depicts connections to a battery for charging, shielded cable, an Ag-AgCl electrode in water, and an oscilloscope. Accompanying the diagram is a legend that defines the symbols used. No photographs, handwritten annotations, stamps, forms, tables, or redactions are present in the image. The image displays a scientific diagram illustrating an experimental setup, labeled "Figure 9." The diagram shows a circuit connecting an oscilloscope and amplifier to a fiberglass water tank containing a plexiglass tube with a fish. The tank is large, measuring 12 feet in diameter and 4 feet high. The setup also includes electrodes for experiments, an object to be detected (an electrostatically charged sphere for Experiment #1(P) and #4(P)), and a permanent magnet for Experiment #3(P). Accompanying text describes experiments involving electric fish species and the stimuli used, such as magnetic fields and electrostatic fields. The page includes some handwritten markings on the left margin, likely organizational or reference symbols. This page contains text from a document titled "Experiment #6." The text describes an experiment involving electric fish, signal attenuation, and the measurement of their detection abilities. There are no photographs, handwritten annotations, stamps, forms, diagrams, or tables present on this page, nor is there any visual evidence of experimental procedures or facilities. The document appears to be a standard text-based report. The page contains a diagram illustrating a setup with two fiberglass water tanks used for experiments. Each tank is equipped with transmitting and receiving electrodes, impedance networks, amplifiers, and FM tape recorders. One diagram also shows what appears to be an oscilloscope and an amplifier connected to receiving electrodes above a "Nylon Net." The second diagram shows similar components connected to transmitting electrodes at "Position E" below a "Nylon Net" with a small fish depicted. The diagram is labeled "Figure 10." and a page number "16" is present at the bottom. There are no hands-written annotations, signatures, stamps, forms, tables, or redactions visible on this page. The page contains a diagram illustrating an experiment involving an electric fish and electrodes. The diagram shows an oscilloscope, an amplifier, and a circular container where the electric fish is placed. Two sets of Ag, AgCl electrodes are depicted