IIKVIKW OK i.rn.iiA i n;i.. V 29 



interesting, however, arc the experiments involving rectal 

 feeding, calcium being stored despite a continuous drainage of nitro- 

 gen from the body. In the latter case, as the protein al)sorbed from 

 the food was insuilicient, tlie muscles and glands must have dimin- 

 ished in bulk, and yet calcium was retained. This fact rather points 

 to the bones as the place where calcium is Mored. In the experi- 

 ments on himself, and in those with rectal feeding, with a fixed diet 

 the urinary calcium varied but slightly, and the variations, such as 

 there were, ran parallel with the total amounts of urine excreted. 

 This result is not remarkable if it is assumed that the kidney, in 

 order to lighten its work against osmotic pressure, allows a fraction 

 of each of th. !' the blood to escape into the urine. The greater 



the volume of the urine, therefore, the greater the amount of salts 

 eliminated. 



The following theories have been published by Albu and Neuberg" 

 concerning the cause <f rick. 



1. An in-ulHciftit amount <>f calcium in the food. 



\n inadequate al.-..rptioii <>l tin' calcium sal <>d. 



in thf hoM.'-buil.lin 

 .rkmcc "t" calcium :ilM,rjiti.n in boD6fl them- 



.a rickets aii-l Mo<>,l pn^sure IM.-'-.! mi the thcnry tStfili/.- 



ili. ii calcium inrtai by a secretion of the kidni 



iiilar theories a^ to the ca leomalacia \\ere enumerated by 



the same author as follov. 



I. A lack i'f calcium in 



\ lack "t" Cftll iUBQ .1 -)d. 



A decreased alk If in the 



which Ii.-- ilciuin Kil- 



I f mctal>ol: ' ri-sultiiu; from a .limini-h.-.l acti\ity 



of the ivarii-. which in 



!{cnnick>-' last's. wteomalacia an a m(>ta>>>li-m -li-.-.i-.-. (In- |.!i..-|.!n.ru- mcta- 

 1 > inr also affected. 



In pathological cases tin- and opinions are maii\ and 



iliver^e in regard to Calcium elimination. l-'r example, Px-n. 

 found increased calcium elimination in fever, while Senator' 7 obtained 

 opposite results. l u charac t cri-t i- bone diseax nialacia and 



ricket^. the >ame ^tai md. 



Calcium and magnesium occur in the urine for the nio>t part aa 

 phosphate-. The quantity of earthy phosphates eliminated daily is 



':- -1. Berlin, 11K)6. 



::ch. m.-a. \V.M-h.-n>chr.. 1577, 



.'nr.--l.uchf. Kin.lcrhcilkun.lc. HMMI. /,/ 



:.-k.. \^n I. SS : 17 172. 



lin. klin. W.K-h.-nschr., 1!)04, .;/ : 11") L 



Patholo^ie dee 8tofwech0eI0, licrlin, 1874, 

 . me.!. \Visscnsch., 1877, /.7 . 



