INDEX. 
615 
doctrine of cells, 530 ; changes in the ovarian ovum preparatory to fecundation, ibid . ; 
changes in the ovum immediately after fecundation and before it leaves the ovary, 534 ; 
changes in the ovum after its discharge from the ovary. Addition of the chorion, 536 ; re- 
capitulation, 554 ; appendix, 558 ; table of measurements, 567 ; explanation of the plates, 
569 ; additional observations, 590. 
Escapement, description of an, for an astronomical clock, invented by the late Captain Henry 
Kater, F.R.S., drawn up from his own memorandums, 335. 
Euphorbium resin, 364. 
F. 
Fallopian tube, ova found in the, of the Rabbit, 565. 
Faraday (Michael, D.C.L.). Experimental Researches in Electricity. Sixteenth series: On the 
source of power in the voltaic pile, 61. 
■ . Seventeenth series : On 
the source of power in the voltaic pile (continued), 93 ; Note, 127. 
Fasciculus ( Primitive ) of voluntary muscle, 458 ; table of diameters of, 460 ; transverse striae in, 
461 ; fibrillae of marked, 463; not tubular, but consists of a true bundle of fibrillae, 466; 
sarcolemma or tunic of, 474; corpuscles of, 482; of the extremities of, and union to other 
structures, 485. 
Fecundation, changes in the ovarian ovum preparatory to, 530 ; point of, 532 ; changes in the 
ovum immediately after, 534. 
G. 
Gassiot (John P., Esq.). An account of experiments made with the view of ascertaining the 
possibility of obtaining a spark before the circuit of the voltaic battery is completed, 183. 
Geology (Physical), Researches in, second series, 193; on precession and nutation, assuming the 
interior of the earth to be fluid and heterogeneous, 193. 
Germ, the, or foundation of the new being ; its place of origin and form, 536 ; comparison of the 
germs of animals and plants, 553. 
Germinal vesicle, and spot, changes in, preparatory to fecundation, 531 ; immediately after fecun- 
dation, 534 ; not a nucleus, but a parent-cell, 536 ; statements and conjectures of physiologists 
on the nature, office, and destination of the germinal vesicle, 558. 
H. 
Herschel (Sir John F. W., Bart.). On the chemical action of the rays of the solar spectrum on 
preparations of silver and other substances both metallic and non-metallic, and on some pho- 
tographic processes, 1. I. Of fixing photographs, 4. II. Of taking photographic copies and 
transfers, 7. III. Of the preparation of photographic paper, 8. IV. Chemical analysis of 
the solar spectrum, 15; extension of the visible prismatic spectrum, — a new prismatic co- 
lour, 19 ; chemical properties of the red end of the spectrum, 22 ; combined action of rays 
of different degrees of refrangibility, 23 ; chemical action traced much beyond the extreme 
red rays ; — exercise of a blackening or deoxidating power by the red rays themselves, under 
certain circumstances, 28 ; possible indication of absorptive action in the sun’s atmosphere, 
29 ; existence of a blackening or deoxidating power in rays beyond the extreme red, 31 ; 
effect of the spectrum on certain vegetable colours, 33. V. Of the whitening power of the 
several rays of the spectrum under the influence of hydriodic salts, on papers variously pre- 
4 K 2 
