SUBMAXILLARY SALIVA. 17 



According to the determinations of Mitscherlich, the solid 

 residue of the parotid saliva in man contains about 45'7-jj- of 

 mineral constituents, in which there are contained 35*4 parts of 

 chloride of potassium, and about the same quality of potash and 

 soda (after deducting the carbonic acid) ; in this secretion 

 from the dog, Jacubowitsch found that the ratio of the organic 

 to the inorganic matter was as 29*8 : 70*2 ; the latter consisted of 

 44*7 parts of alkaline chlorides, and 25*5 of carbonate of lime. 

 In 100 parts of the solid residue of the parotid saliva of the horse, 

 T found 53*9 parts of ash, in which there were 21*764 parts of 

 chloride of potassium, 16'983 of carbonate of potash, and 11*226 

 of carbonate of lime, while there were only % 882 parts of the 

 phosphates of lime and magnesia, 0*805 of the sulphate and 2*240 

 of the phosphate of soda. 



THE SECRETION OF THE SUBMAXILLARY GLANDS of dogS 



has been carefully examined by Bernard* and Jacubowitsch ; it is, 

 like the parotid saliva, a colourless, limpid, tasteless, and inodorous 

 fluid, and is devoid of all morphological elements. Jacubowitsch 

 determined its specific gravity at 1*0041 ; the reaction is less 

 strongly alkaline than that of the parotid saliva; it contains far 

 less lime in combination with organic matter, and therefore 

 attracts less carbonic acid from the air than the previously 

 described secretion; in other respects, it contains precisely the 

 same constituents, including the sulphocyanide of potassium. 

 Bernard regards the viscidity of this secretion as constituting an 

 essential difference between it and the parotid saliva, and Jacubo- 

 witsch likewise noticed this peculiarity in the submaxillary fluid. 

 According to the last-named observer, it yielded 0*855 J of solid 

 residue, in which the ash amounted to 0*566 parts; so that here 

 the ratio of the organic to the mineral constituents was as 33*8 : 

 66*2 ; the latter contained 52*6 parts of alkaline chlorides and 

 13*6 of carbonate and phosphate of lime and magnesia. 



Bernard directs attention to the circumstance that an infusion 

 of the parotid gland is very aqueous, and cannot be drawn out in 

 threads, while an infusion of a piece of the submaxillary gland 

 is as viscid as the secretion collected from Wharton's duct. 



THE SECRETION OF THE BUCCAL MUCOUS MEMBRANE in 



dogs has been examined by Jacubowitsch; but the secretions 

 of the orbital and of the sublingual glands (which latter are, 

 however, very little developed in dogs) were mixed with it. This 

 fluid was very viscid and tenacious, frothy, and colourless, but 



* Arch. g&i. de M&L.4 Ser. T. 13, p. 1-29. 

 VOL. II. C 



