Response in the Living and Non-livingLongmans, Green, and Company, 1902 - 199 pages |
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Common terms and phrases
abnormal abolished after-effect after-oscillation amplitude of vibration anesthetic animal tissues annealing cessation of light chemical reagents chloroform circuit clamped continuous stimulation current of injury current of response curve deflection depression diminution of response disappears dissimilation E.M. variation electric response Electro-physiology electrolytic excitatory exhibited experiment fatigue galvanometer gradually HUGO MÜNSTERBERG HYSTERESIS increase of response intensity of light intensity of stimulus LEAF-STALK magnetising maximum mechanical mercuric chloride minute molecular condition molecular disturbance molecular modification muscle Na,CO negative variation normal response observed obtained oxalic acid period of recovery phenomena physiological plant response platinum poisons positive variation potentiometer produced radish relation between stimulus RESPONSE IN METALS RESPONSE IN NERVE response in plants response-curves resultant retina reversal seen sensitive cell shows similar specimen sponse staircase effect stalk stimulus of light successive responses temperature tion torsional vibration twitch undergo uninjured visual volt Waller wire zero zinc
Popular passages
Page 95 - ... 01 of this value. The intensity of the response, however, does not depend on the chemical activity of the substance, for the electromotive variation in the relatively chemically-inactive tin, and even gold, is greater than that of zinc. Again, the sign of response in silver, positive or negative, defends on its molecular condition.* 2.
Page 101 - Mechanical responses in muscle. again is modified by any influence which affects the molecular condition. That the excitatory state persists for a time even on the cessation of stimulus can be independently shown by keeping the galvanometer circuit open during the application of stimulus, and completing it at various short intervals after the cessation, when a persisting electrical effect, diminishing rapidly with time, will be apparent...
Page 174 - When the stereoscope is turned towards the sky, and the cross looked at steadily for some time, it will be found, owing to the alternation already referred to, that while one arm of the cross begins to be dim, the other becomes bright, and vice versa. The alternate fluctuations become far more conspicuous when the eyes are closed ; the pure oscillatory after-effects of the strained sensitive molecules are then obtained in a most vivid manner. After looking through the stereoscope for ten seconds...
Page 165 - ... is in the first place increased, then diminished; during the continuance of light it is still slowly diminished to a point where it remains constant; and on the removal of light, there is a sudden increase of the electromotive power nearly up to its original position.
Page 174 - ... are then obtained in a most vivid manner. After looking through the stereoscope for ten seconds or more, the eyes are closed. The first effect observed is one of darkness, due to the rebound. Then one luminous arm of the cross first projects aslant the dark field, and then slowly disappears ; after which the second (perceived by the other eye) shoots out suddenly in a direction athwart the first. This alternation proceeds for a long time, and produces the curious effect of two luminous blades...
Page 188 - The investigations which have just been described may possibly carry us one step further, proving to us that these things are determined, not by the play of an unknowable and arbitrary vital force, but by the working of laws that know no change, acting equally and uniformly throughout the organic and the inorganic worlds.
Page 9 - negative variation" of current of rest. Index connected with galvanometer needle records curve on travelling paper (in practice, moving galvanometer spot of light traces curve on photographic plate). Rising part of curve shows effect of stimulus; descending part, recovery. on such surface being in a similar molecular condition, their electrical level or potential will be the same. They are iso-electric. No current will be exhibited by the indicating galvanometer when two non-polarisable electrodes*...
Page 188 - There is in it no element of mystery or caprice, such as we must admit to be applied in the assumption of a hypermechanical vital force, acting in contradiction or defiance of those physical laws that govern the world of matter.
Page 187 - ... Act of 1876. Response in the Living and Non-Living, by JC BOSE. London, New York and Bombay, Longmans, Green and Co., 1902. pp. xix, 199. In this work the author has brought together and amplified the results of a series of papers, published between 1900 and 1902, the aim of which is to prove that "living response in all its diverse manifestations is found to be only a repetition of responses seen in the inorganic.
Page 93 - Modifications of experimental arrangement to show electric response in metals. quick torsional vibration round the vertical wire, as axis, by means of the handle. As the wire A is separate from B, disturbance of one will not affect the other. Vibration of A produces a current in one direction, vibration of B in the opposite direction. Thus wo have means of verifyingevery experiment by obtaining corroborative and reversal effects.