I;KVII:\\ o? LJTEBATURE. 27 



organic framework is poor in calcium. The calcium content of tlic 

 ilesh and blood sliows no variation and the brain but a slight vari.i- 

 tion from the normal. 



Following some experiments made by Sanford and Lnsk at the 

 Vale Medical School on new-born pijrs. Wilson" studied the influence 

 of diet on the irrowth of yonn^ piles. Three piirs were killed and 

 analy/ed at birth and three were reared on a skim-milk diet. To the 

 diet of one piir, lacto-" W8fl added; to that of the second, dextrose: 

 and the third was i^iven the skim milk without any added substance. 

 The lacto-e-fed pi-_r thrived best, while the pi^ fed on >kim milk alone 

 showed the lea-t pi- een days. The analyses showed 



that the piir fed on skim milk used '*- per cent of the calcium in the 

 food for irrowth: the lactose-fed |>ir used 7>) per cent: and the dex- 

 tro-e-fed piiMil p.-; cent. The calcium content of the bodies of the 

 pigs at the end of the experiment \\ vn:j, and s.i:; per eent, 



re-pect i\ el\ . Calcium 81 evidently depends on the develop- 



ment of the animal rather than on any >pecilir influence of the milk 

 Constituents. lleiter'' found striking retardations in the develop- 

 meiit of th,- -keleton of oldn pi-- i'-,| ,.n ^kiiu milk for many months, 



but Ho rvidence of I'icket- \\a- ^een. 



\V. Camei-er. jr.. iind- that the calcium content of motheis' milk 

 i- barely sullicicnl to < ,,\, i ilir QI lie nur-in-.: infant if the per- 



centaL r c coinpo-ii ion ,,f the li\ e-mont h>-o|<| bal)\ \\ei~e the BEUU M 

 that of tin- n. -\\-born baby. The p. . of calcium in the !ie\\- 



boi-M pi'j pet -cut at birth and i- s.l."> per 



cent at the end of two and one-half \\eek-' feeding. If the pi-- fed 

 on 1. lined '.. I pel- cent <-alcium at the end 



of the t\\o and one-half \\ I, an almost complete calcium 



ab-oi pt ion would have taken j)la 



t iliat when an animal i> <leprived of all inor- 



-alt- in ii^ food profound constitutional disturbances, resulting 



in <leath, are pioiincr.l. '1 he -alt> of the blood mii-t not only be 

 nt in Millicient (piantity to bi-ini: the o-motic pre UK- of the 

 blood to ; , con-tant \alue.but they must also be present in certain 

 delimit' ratio ry li\ inir cell of the body must be washed by a 



fluid containing -alt^ of certain moiiovalent and divalent metals in an 

 unvarying ratio. otherwi>e a disturbance in the int racellular ion- 

 protein- Loeb 01 colloidal salt- ( )-b<i ne i- produced. Bearing 

 in mind this nece--it\ for a con-tant ratio between the various -alts 

 of the blood, a number of interest inir <pie-tion- are raided by Patter- 

 -on in reirard t< the probable effect- of dej)rivinir an animal, coin- 



" Ani.-r. .). I'll;. 1!)7. d\\ : 39. 



.11 ter, \.-\v V..rk, 1906. 



JJ. Phy-inl.. |!(Mi. .; :84. 



