394 



Prof. F. J, Cole. 



[Jan. 17, 



and this I have noticed a number of times. For example, a specimen in the 

 live box placed on the resonator responded very markedly to B flat five 

 successive times. Transferred then to the physical table it responded 

 energetically to B flat the first time, not so distinctly the second time, 

 slightly the third time, very distinctly the fourth time, and slightly 

 the fifth time. Eeplaced now on the resonator, it no longer responded 

 either to B flat or A flat. As it seemed possible that the shock of 

 compressing the animal in the live box and testing it at once might affect the 

 results, I tried the effect of several hours' imprisonment in the live box 

 before applying the stimulus. I could not, however, persuade myself that 

 there was any appreciable difference. For example, a female was placed in 

 the^live box, and the current of water started at 11 a.m. The heart beat 

 was then 210 per minute.* Tested on the resonator first at 135 cm. and 

 then at 85 cm. at 2.30 p.m., when the heart beat was 240 per minute, it 

 responded quite well at first, but then failed to respond on the physical table, 

 and afterwards on the resonator. 



A typical, successful experiment may be described as follows : A male was 

 tested on the resonator (but without the water current) with the chromatic 

 scale up and down from middle B flat. Between every two notes the B flat 

 was sounded in order to make it certain that a negative result was not due 

 to fatigue or other causes. The response to B flat was very energetic, the 

 first antennoe making a sudden and rapid downward sweep under the body, 

 carrying the second antennte with them. There were also responses, but 

 not so well marked, down to the A flat, and slight doubtful responses 

 three semitones below that again, but no more. In all cases, however, there 

 was a quite perceptible difference between the response to the alternative 

 B flats and tlie other notes of the scale. On the animal showing signs of 

 fatigue the alternative 15 flat chromatic scale was repeated, but now there 

 was only a response to the V> flat. Tested to an octave above tlie middle 

 B flat, there was only a slight response to the upper three semitones, but in 

 no respect was it at all striking. Transferred now to the physical table the 

 animal responded simply to the l' flat, and then only when tlie bell of the 

 trombone was quite near the microscope. This, however, must have been 

 due to fatigue, as no better result was elicited when the experiment was 

 subsequently tried on the resonator. In another case a male was tested on 

 the resonator and with running water with the alternative B flat cliromatic 

 scale, a quarter of a minute rest being allowed between successive notes. 

 The response to B flat was quite undoubted, to A natural very slight, and to 

 A flat scarcely perceptible, but tliore was no further response down to F, at 

 * MisH CussanB states tliat tlio hoart boat ranges from 120 to 130 per minute. 



