Ki:vn.\v <>F i.rn.i; A i < 9 



March and proteins for sonic time, \\ithout a supply of phosphate-. 

 hut their growth and propagation suffer. Phosphoric acid is also 

 without doubt <>f importance in the formation of the lecithin.- and 

 other organic phosphorus compounds. The inorganic forms of phos- 

 phorus occur in the bones and teeth as calcium phosphate and mag- 

 nesium phosphate. 



A small part of the phosphorus of the food is in the form of inor- 

 ganic salts, a- in meat, hut i- mostly in organic combinat ion, a- in 

 milk etc., as nucleo-albumin. nucleins, casein, lecithin, and 



vitellin. 



PHOSPHORUS METABOLISM. 



Ivohmann " and his follo\\-i-. Marcu-e. Sieinit/.. 1 Leip/.iger,' 7 

 Zadik. Klirlieh.'' mid (iou>tein,' / favor the organic forms of phos- 

 phorus, and the opinion of the majority is that the nuclein.-.not be in*; 

 ea-ily >plit by the di.LTeMive jmV. bsorhed with dilliculty; con- 



se()iiently the body builds it- organic compound- from the more 

 -imple organic phosphorus bodie-. 



The ti Salkou-ki. I'mber. and the Bre-laii -chool i- that 



the body ha.- not the pouer to build from j>ho-phoi ii--frce protein 



and inorganic p! organic phosphorus combinations essen- 



tial to the life of the cell. Lack of plm^phato in the food is u ithout 

 influence on pho.-ph .-utioM. and exec ive feeding of organic 



pho-phoni-> c : ion of more pho-phoi-ii- than ti 



sive feeding of him L.M nic pin -pha t >. 'I'he a.lvaii' ; OlgaDlC 



pho^)!iM m > over inorganic phos] luring the period of Drouth 



is >h.)\\n by (Yonheim and Miiller b\ i-\p-riments pci f..nned on 

 li\" inl'ant> and a l problr: .. determine \\hether the 



two f. !! ^ani.- ph.ivphorus, j)rotein-ph<phorus and fat-phos- 



phoi'ii-. exert the same inlluence on the aimilation of phosphorus 

 and iiitrojren. Tin- I were Q pre|>arat ion from 



-kiiiimed milk and a lecithin preparation from the yolk of eggs. 

 The f.., id containing lecithin apjx'ared i ution of cal- 



cium, most of which ua- fniiiul in th- l^xperiments wei'e also 



made u|>on ! 3 old at the beginning of the experi- 



ment. Thef ..... ! ^nsisted of milk, rice, flour, and butter. Three 



diet phi -Ik. and t u o n-ceived plasmon 



rlin. klin. NV.M-h.'ii- 

 ft Aix-h. gesam. rhy-iol 



!lid., 1898. 

 d Ibid., 1899, 78: K>_' 



1., 1899, ? 



/Stoffwechselv.TMirh,-. Imuiir. Ii m, 1900. 



^Ibid., 1901. 



*Zt.-v -liat. j.hysik. TluTapi.-. 1903 



