146 THE SECRETIONS: 



MarchandV analyses correspond very closely with those of 

 Lehmann. He cites the two following analyses as representing 

 the composition of the healthy secretion : 



Water . . . 933-199 938-856 



Solid constituents . . 66-801 61-144 



Urea 32-675 30-321 



Uric acid 



Lactic acid . 



Extractive matters 



Mucus 



Sulphate of potash 



Sulphate of soda 



Phosphate of soda 



Biphosphate of ammonia 



Chloride of sodium 



Chloride of ammonium 



Phosphates of lime and magnesia 1-210 1-001 



Lactates . . . 1-618 1-032 



1-065 1-001 



1-521 1-362 



11-151 10-553 



283 -201 



3-587 3-201 



3-213 3-011 



3-056 2-998 



1-552 1-231 



4-218 4-001 



1-652 1-231 



The following table gives the mean result of six analyses of 

 the morning urine of a healthy man, instituted by myself. 2 



Specific gravity . . . 1022-5 



Water .... 961-00 



Solid constituents . . . 39-00 



Urea .... 16-60 



Uric acid . . . -61 



Fixed salts . . . 9-27 



Organic matter and loss . . 12-07 ] 



The apparent discrepancies in the composition of healthy 

 urine, as shown in the analyses that have been quoted, depend 

 for the most part on the fluctuating amount of water. If we 

 calculate the proximate constituents of the urine in relation to 

 an equal amount of solid residue, we shall find these dif- 

 ferences exhibited in a much less striking manner, although to 

 a certain degree they still exist. 



100 parts of the solid residue of the urine contain 



1 Lehrbuch der physiologischen Chemie, p. 292. 2 L ancet , Feb. 1844. 



