ADDITIONS AND NOTES TO VOL. II. 553 



100 parts of flesh contain, according to Schmidt's analyses, 22*83 

 parts of muscular substance and tendon ; and 100 grammes of 

 alburninates + collagen = 16*11 of nitrogen (with 53*01 of carbon, 

 7*02 of hydrogen, 22*86 of oxygen, and 1*00 of sulphur) ; hence 

 these 100 parts of nitrogenous matters must yield 34'52 parts of 

 urea (which contain 16*11 of nitrogen). Hence 100 parts of flesh 

 (corresponding to 22*83 of albuminates + collagen) yield according 

 to this calculation 7'88 parts of urea. A cat during 18 days' inani- 

 tion excreted on an average 2- 11 grammes of urea in 24 hours 

 for every kilogramme's weight. 



With regard to the extractive matters Scherer found that a child 

 aged three years and a half, excreted in 24 hours (when living on a 

 mixed diet) 2*17 grammes of extractive matters; a boy, aged seven 

 years, 3*88 grammes ; a man, aged twenty-two, 24*335 grammes ; 

 a man, aged thirty-eight years, 20*484 grammes ; and an 

 insane patient, aged fifty years, who was starving himself, 10*59 

 grammes. 



The fixed salts discharged with the urine in 24 hours, were 

 determined by Scherer as follows : in the child, at 10'98 grammes ; 

 in the boy, at 10*23 grammes; in the young man, at 23*627 

 grammes; in the middle aged man, at 29*919; and in the 

 man who was starving himself, at only 3*62 grammes. 



In addition to what has been already remarked [partly in the 

 text, and partly in the additions] regarding the individual amounts 

 of the various organic matters, we have only to add, that accord- 

 ing to the recent investigations of Hegar, Gruner, and Winter, an 

 adult man excretes in 24 hours for every kilogramme of his weight 

 0'064 of a gramme of phosphoric acid, (the extremes being 0*096 and 

 0*043 of a gramme); and 0*032 of a gramme of sulphuric acid. 

 According to Schmidt's investigations, a cat when living on 108*7 

 grammes of flesh excretes 0*267 of a gramme of sulphuric acid for 

 every kilogramme of its weight; when living on 44*12 grammes 

 of flesh, 0*106 of a gramme ; when living on 46*15 grammes of 

 flesh 0*084 of a gramme; and when living on 76 grammes of flesh 

 0'078 of a gramme. 



END OF ADDITIONS AND NOTES TO VOL. II. 



