472 



LIQUID PARTS OF ANIMALS. 



age of the individuals. They are greater in men in the vigour 

 of life than in women in the same vigour of life. They are 

 greater in middle-aged women than in old persons or infants. 



5. The fixed constituents of urine not driven off by heat, 

 namely, 



The earthy phosphates, 



Common salt, 



The alkaline sulphates and phosphates, 



are secreted in variable quantities, having no relation to the sex 

 or age, by different individuals, and also by the same individuals 

 at different times. 



The following table, exhibiting the result of M. Lecanu's ex- 

 periments, conveys a great deal of important information in a 

 small compass : 



No. of Urine void- Uric acid in Urea in 24 Mucus voided 



experi- ed in 24 Sp. gravity 24 hours hours in in 24 hours 

 ments. hours in gr. of urine. in grains. grains. in grains. 



17.44 



26-54 



* Jour, de Pharmacie, xxv. 758. 



