28 Tue MIcROSscoPE. 
a needle horizontally over the specimen skimming them off. 
The specimen is now covered and examined with a high power. 
The cells are seen partly isolated and partly hanging together. 
They are very large, being from the ;1, to -4, of an inch in di- 
ameter, and they are so transparent that it may be necessary to 
darken the field in order to render them visible. Each cell has 
a single nucleus that is quite small as compared to the whole 
body of the cell. . 
In addition to these large cells found in the saliva there are 
a number of smaller globular cells which resemble the white 
corpuscles of the blood. They are rather larger than the white 
blood corpuscles but are capable of exhibiting the same 
amceboid movements. They are to be regarded as white cor- 
puscles which have either migrated from the 
blood vessels in the salivary glands and thus 
been carried to the mouth with the flow of 
saliva, or as corpuscles which have come from 
7 the mucous membrane lining the back of the 
Feet eee an ea mouth where are found large quantities of 
lymph corpuscles. The enclosed granules of these “ salivary 
corpuscles” are capable of exhibiting the peculiar Brownian 
movement, seen also in the white corpuscles of the blood after 
the imbibition of water. The saliva very frequently contains 
many accidental ingredients, as starch granules, fibers from 
animal and vegetable food, and various fungous growths. 
Stratified pavement epithelium is found covering the sur- 
face of the body, forming the epidermis. The most external of 
these cells are very irregular and broken and have no nucleus. 
The epithelial cells composing the nails, are 
separated from each other for study by boil- 
ing a thin paring of the nail in a 10 per 
cent. solution of soda, or the section may re- 
main for a short time in a 27 per cent. solu- 
tion of potash. The cells are closely united, 
Epithelium from the are irregular in shape and enclose around or 
nail. x 400. lens-shaped nucleus. 
