Page 287 - My FlipBook
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Fig. 127. A photoniicrograph of salts dialyzcd from the saliva and crystallized hy drying:,
forming a coatinp on the glass. These salts and also the giinimy material from the saliva, are left
in the same manner on the walls of the cavity whenever a cavity wet with saliva is dried by the warm
air blast. Any one may see the film by drying a drop of saliva on a clean glass.
