Page 169 - My FlipBook

Fia. 63.

Fia. 64.

Figs. 63, 64. Photographs, very nearly full size, of a small dialyzer used for separating the salts
from the saliva, or other body fluids, for the microscopic study of the crystals. With this, it is the inten-
tion to deal with very small volumes. In Figure 63 the parts of the piece of apparatus are in position.
In Figure 64 the lid with the tube passing through it is removed and laid to one side. The tube passing
through the lid has a small rubber band around it above the lid, which may be moved to hold the tube
at any height above the bottom of the vessel. The lower end of the tube is closed with a piece of gold-
beaters' skin stretched over it and tied with a thread. This may have a coating of collodion to close
any possible opening. A piece of fresh bladder could be used as well. In use, the saliva or other body
fluid is placed in the dish and about two cubic centimeters of distilled water are placed in the tube
and the height of the tube adjusted so that the surface of the water in it will be about level with the
top of the fluid in the disli. Devised and first used for this purpose by Dr. Edward C. Kirk. Tliis
dialyzer was presented to the author by Dr. Kirk.