URINE. 471 



C, . 334-9 . 457-5 



D, , 416-7 . 463-0 



E, . 416-7 . 509-3 

 H, . 154-3 . 185-2 



4. When the aqueous portion of the urine is increased, the 

 quantity of urea voided does not undergo a corresponding in- 

 crease. 



5. The quantity of urea does not bear a constant ratio to the 

 specific gravity of the urine. 



6. The quantity of uric acid voided in twenty-four hours was 

 found to vary from 1-373 grains to 14-307 grains. 



7. Healthy urine contains from T J 2 to T ou5s tn f i ts weight 

 of uric acid. 



8. The uric acid voided does not bear a constant ratio to the 

 quantity of urine. 



9. The quantity of fixed salts in urine varies in twenty-four 

 hours from 378 grains to 74-8 grains. 



10. The earthy phosphates voided in twenty-four hours were 

 found to vary from 30*25 to 0'447 grains. There is no difference 

 between the quantity of these salts in the urine of infants and of 

 young men ; but the quantity in the urine of old persons is sen- 

 sibly less. 



11. The quantity of common salt in urine voided in twenty- 

 four hours varies from 116-5 to 0-247 grain. 



12. The quantity of sulphuric acid in urine voided in twenty- 

 four hours varies from 57*5 to 15*25 grains. 



13. The quantity of phosphoric acid in the phosphate of soda 

 and ammonia contained in urine voided in twenty-four hours, va- 

 ries from 25-37 to 0-17 grain. 



From these facts Lecanu has drawn the following conclu- 

 sions : 



1. In the same individual the urea is secreted in equal quan- 

 tities in equal times. 



2. Uric acid, also, in the same individual, is secreted in equal 

 quantities in equal times. 



3. The secretion of urea and uric acid varies very much in dif- 

 ferent individuals during equal times. 



4. The variable quantities of urea which different individuals 

 secrete during equal times, bear a constant ratio to the sex and 



