i;i:vu:\v OF LI i I;I;A rn;i.. 1,) 



and bore litters of fairly vigorous pi^s. which on the Stone ration 

 completed the cycle hack to SI) pounds, while, animals on the same 

 ration, without the inorganic phosphates, collapsed in three months, 

 losing weight and the u>e of their leir>. Other important observa- 

 tions made are a- follows: (1) Animals on a ration extremely low 

 in phosphorus made as lap up to 7~> to 100 pounds, as did 



animals receiving an ahundtince of this element, hut after reaching 

 this point the v. is reduced :ind colhipse followed. . ('J) When 



such low j)hosphorus rations as induced these symptoms \\ere 

 supplemented hy inorganic phosphates, no unfavorable results ap- 

 peared. Animals fed a low phosphorus diet, supplemented by 

 inorganic phosphates, made as vigorous a development a,s other 

 animal> receiving all the phosphorus in the organic form. (:>} Deter- 

 minatioi ''ium and phosphorus in the principal organs and 



tissues of the animals fed on the low phosphorus ration showed that 

 they maintained their normal bod\ comj)osit ion. The per cent 

 of a-h in the skeleton of pi'/- on .-. depleted phosphorus ration uas 

 reduced to > .ue-half that of pij/s uhich received a normal 



mtion. or the phosphorus-,- plus inorganic phosph, 



When the anin ir\in/ for phosphorus they derived it 



fr their hones, hut alu.-iy- remo\'d calcium and phosphorus in the 



proportion- found in tricalcium phosph; 



PHOSPHORUS ELIMINATION. 



In Mudyini: i i n of j)ho>j)horu- and 



other Bill the inllucnr, of ih,- n-a.-tion- of the ira-t ro-intcs- 



M impo! .'haracirr of th<> a -h of 



l. All of the conditions influencinir acidiiv and 



fret the a 1 :i and the pah <f i of 



pho-ph.i' iiim. and m.^nc-iu:;, In t he ca-e of herl>i\ ora 



a larire portion of the- Inated in the feees, no 



ah-orptioii haxini: taken place. This i- likelv to happen when the 



food ml -ullicient ca'citim ami mairnesium are present 



mbine \\ith the phosphoric aci<l. There ifi then an excivtiori of 



these elemrnt.s through the intestines as well as through the kiln- 



and when all. KUltesI inal tract 



the eiiminalion through the hcwel i< likely to exceed that through 

 the urine. In onmivorou- animals a larger portion of the phos- 

 phorus, calcium, and ma^nesium, as \\-<dl as t he nitrogen, is eliminated 

 hy the kidneys than is the case with herbivorous animaU. 



The subject of phosphorus elimination has been studied under 

 many pathological condition-, and especially in hunger, in the cases 

 Hreihaupt/' and otl 



r and Miillcr: Yin-how's An-hiv. Suppl.. 1893, 131 :'2. 

 1'ilh-r: \ irchou-'s Art-hiv. Suppl., 1893, 131 : 52. 



