186 



when placed side by side, could not be distinguished from one 

 another. 



The ova were of the same colour when first deposited, and under- 

 went the same changes of appearance, at the same time, in the dark 

 and in the light. 



So far, therefore, as the direct agency of light is concerned in the 

 development, growth, nutrition, and coloration of animals, the results 

 of these experiments closely correspond with those already recorded 

 in my Paper. 



IV. " Ou the Effects produced in Human Blood- corpuscles by 

 Sherry Wine, &c." By WILLIAM ADDISON, Esq., F.R.S., 

 Fellow of the Royal College of Physicians, London. Re- 

 ceived September 10, 1859. 



(Abstract.) 



The author has found that when a small drop of fresh blood is 

 placed beside a similar drop of sherry wine on a slip of glass, and 

 viewed with the microscope, after being covered as usual with a thin 

 piece of glass, certain changes are seen to take place in the blood as 

 it mingles with the wine, which are thus described : 



" In those parts where the wine is mingling with the blood at 

 the outer edges of the mass various altered corpuscles will be seen. 

 They float in the fluid, separated from each other, having now no 

 longer any disposition to adhere together in rolls. Their outlines 

 are altered, and sundry markings appear in their interior. After a 

 short time perhaps ten minutes, sometimes sooner numerous cor- 

 puscles will be observed throwing out matter from their interior ; 

 two, five, or ten molecular spots fringing their circumference. Some 

 of these molecules grow larger and seem coloured ; others of them 

 elongate into tails or filaments, which frequently attain to an extra- 

 ordinary length, and wave about in a very remarkable manner. 

 They all terminate, at the extremity farthest from the corpuscle, in 

 a round globular enlargement. A single corpuscle may very frequently 

 be seen with five or six of these tails. 



" During the observation of these phenomena, numerous mole- 

 cular particles are seen continually passing from the corpuscles ; they 



