44 
Sir Everard Home on the 
Fig. 5. Some globules of the blood of the skate floating in 
the coloured serum. The blood was taken from the heart of 
a fish quite alive at the time the heart was opened. In these 
globules the enveloping substance is quite smooth, and the 
globules are perfectly in the shape of eggs ; and the contained 
spherical globules are not visible. 
B. A group of seven globules floating in the serum, diluted 
in water, upon a piece of glass ; the globules are attracted and 
adhere closely to each other, and become flat ; the inner sphe- 
rical globule is distinctly seen, the enveloping matter forming 
an elevated rim round it. 
C. represents the same group, after having been 20 minutes 
in the diluted serum ; the enveloping substance is dissolved ; 
and after all the moisture is evaporated, the spherical glo- 
bules appear still closer drawn together, and quite clear and 
distinct, and the enveloping substance almost entirely gone, 
leaving only some greasy marks on the glass ; magnified 400 
diameters. 
Fig. 6. A group of crystals of salts formed on the surface of 
the decomposed blood of the skate, when the blood begins to 
putrify ; magnified 200 diameters. 
Plate IV. 
The human stomach and spleen in their relative situation, 
of the natural size, from a young man of 15 years of age. 
A. shows the vas breve where it joins the splenic vein. 
When the branches are traced to the stomach, some dip in 
between its coats, the others run on the surface, anastomo- 
sing with the branches of the other trunks belonging to that 
viscus. 
V 
