168 Mr. Gulliver's Contributions to the 



as to their distinctness : margaric acid melts at 60° C, the 

 margarate of the oxide of aethyle at 22°; stearophanic acid, 

 on the other hand, has its melting-point at 68° C, and its 

 compound with aether at 32°. But this is more effectually 

 proved by the splendid crystallization of the acid and of its 

 soda salt. When compared with the very numerous pre- 

 parations of fats and their salts in the collections of the Giessen 

 laboratory, they surpassed all in lustre and beauty, and by 

 the well-defined form of the crystals of the soda salt. 



As above stated, the acid occurs in a free state in the grains, 

 but only in small quantity, the greater part consists of the oily 

 acid ; it probably varies according to the time the grains have 

 been preserved, as is the case with palmitic acid. On the 

 whole the fatty substances may probably constitute 15 per cent, 

 of the grains, of which about a third would consist of the 

 neutral fat. Wittstock obtained 11*2 per cent, of oily matter 

 by pressing the grains between hot plates. 



A portion of the oily mass was subjected to dry distil- 

 lation, and the products boiled with water, from which on 

 cooling a large quantity of sebacicacid was deposited in beau- 

 tiful needles with a nacrous lustre, and at the same time 

 another fat acid separated on the surface, which was probably 

 margaric acid. This experiment proved the oily fat and oily 

 acid which occur together with that above described in the 

 fruit of Menispermum Cocculus, to be oleine and oleic acid, 

 since, according to Redtenbacher, these alone afford sebacic 

 acid on dry distillation. 



The colouring matter which is peculiar to the shells could 

 not be obtained in a stale fit for analysis. 



XXVII. Contributions to the Minute Anatomy of Animals. By 

 George Gulliver, F.R.S., fyc. fyc— No. III*. 



On the Pus-like Globules of the Blood. 

 TN the Philosophical Magazine for September 1838, (S. 3, 

 -*■ vol. xiii., p. 193) I have described the frequent occurrence 

 of globules of pus in the blood of persons affected with various 

 severe inflammatory and suppurative diseases, and have since 

 shown how the pale globules of the blood of healthy mam- 

 malia and birds differ from the lymph-globules of the same 

 animals (Gerber's Anatomy, p. 83 and 84 ; Appendix to the 

 same, p. 19; and Philosophical Magazine for June, 1842). 

 In the present communication the globules first mentioned 

 will be compared with the pale globules now so well known 

 as belonging to healthy blood. 



* Communicated by the Author. No. II. will be found in our last Num- 

 ber, p. 107. 



