582 ELEMENTARY PHYSIOLOGY append. 



The solids would consist of the elements oxygen, hy- 

 drogen, carbon, nitrogen, phosphorus, sulphur, silicon, 

 chlorine, fluorine, potassium, sodium, calcium (lithium), 

 magnesium, iron (manganese, copper, lead), and may be 

 arranged under the heads of — 



Proteins. Carbo-hydrates. Fats. Minerals. 



Such a body would lose in 24 hours — of water, about 

 2,600 grammes (6 lbs. or 4j pints) ; of other matters, about 

 940 grammes (2 ll)s.), which would contain about 270-300 

 grammes (or rather more than i lb.) of carbon, 20 grammes 

 Q oz.) of nitrogen and 30 grammes (about 1 oz.) of 

 mineral matters (inorganic salts). 



It could do about 150,000 kilogramme-metres (480 foot- 

 tons ^) of work, and gives ofTas much heat (2,300 kilogramme 

 degree units) as would be able to do five times as much 

 work again, say 850,000 kilogramme-metres (or about 2,700 

 foot-tons). The total energy expended by the body as 

 heat and work (calculated entirely as work) is thus about 

 1,000,000 kilogramme-metres (3,180 foot-tons), of which 

 one-sixth is expended as work and five-sixths as heat. 



The loss of substance would occur through various 

 organs and to the respective amounts shown in the table 

 on p. 268. 



The gains and losses of this body would be about as 

 follows : — 



Creditor: — Solid dry food . 600 grammes (1|: lbs.) 

 Oxygen ... 640 „ (IJ „ ) 

 Water . . . .2,300 „ (5^ „ ) 



3,540 gi-ammes (8 lbs.) 



Debtor :— Water . . . . 2,600 grammes (6 lbs.) 

 Other matters . 940- ,, (2 ,, ) 



3,540 grammes (8 lbs.) 



1 A foot-ton is the equivalent of the work required to lift one ton 

 one foot high. 



