SUBLIXGUAL ASD MIXED SALIVA. 115 



Bernard indicated in 184:7 the specific characters of the 

 sublingual secretion. It is less alkaline than the parotid 

 and submaxillary, and effervesces but slightly on the addi- 

 tion of acids. It is very viscid and ropy, and according to 

 Bicler and Schmidt, it contains, in the dog: 

 Water . . . 990'02 

 Organic Matter soluble 



in Alcohol . . 1-18 



Chloride of sodium \ 



of calcium 

 Inorganic 



Matter 



Phosphate of soda \ 



of lime J- 0-84 



of magnesia ) 



This saliva, says Bernard, is distinguished from the others 

 by the large proportion of ropy organic matter which Ber- 

 zelius calls ptyaline. 



Nuck's gland, before referred to, secretes a saliva very 

 similar to that of the sublingual. The buceal glands secrete 

 an equally viscid fluid. 



The mixed saliva, which is the produce of all the glands 

 and of the mucus follicles in the mouth, varies in viscidity 

 according to the proportions of the different secretions, and 

 is also dependent on the state of the animals. Thus Leh- 

 inaun found in a horse that had not drank water for twelve 

 hours, that the density of the parotidean saliva attained 

 1-0074, whereas, after the animal had taken about 3 kilo- 

 grammes of water, the density was not above I'OOo. The 

 saliva is alkaline, and this property is due to soda. The 

 mixed saliva contains about 99 per cent, of water in the 

 horse, and the remaining solid matter is chiefly made up of 

 ptyaline or salivary matter, which Bernard regards as similar 

 to caseine, soda, chloride of sodium, sulphocyanide of potas- 

 sium, and phosphate of soda. 



