380 Hilda Kivcaid : 



Konig (18) says cows' milk contains .189 grams PoOj in 

 100 c.c. 



Hutchinson (19) says cows' milk contains .220 grams ^.,0^, 

 in lOO c.c. 



It is to be noticed that in the case of eggs and milk the 

 figures for the samples analysed here, are not lower than those 

 given in English or German records. This fact is rather in- 

 teresting, for both are secreted by the parent for the mainten- 

 ance of the young, and the constituents of such secretions are 

 nearly always kept in amounts such as are best suited for the 

 development of the young ; even at the expense of the mother 

 and of the other secretions. When analysing the bones of 

 frogs, it was found that the femur of a female frog, killed just 

 before the breeding season, and containing a mass of small 

 immature ova, contained a very high percentage of P.^O.,, and 

 it is suggested that this might be due to a storing of phosphate 

 in the bone, which could be utilised when the time came for 

 the development of the ova. 



E rperhnents witli Meat. — Eesults of analyses of fresh un- 

 cooked undried beef and mutton, practically fat-free, gave per- 

 centages of P.2O,, the mean of which equalled about .38, and 

 calculated to per cent, in the dried meat about 1.8 per cent., 

 figures which agree with those of Francis and Trowbridge (20), 

 but which are a little lower than those of Wolff. 



Experiments with Fish. — Analyses of fresh uncooked fish 

 gave mean per cent. P.^O., to be .51. This figure also accords 

 well with other analyses. So that as far as the flesh foods 

 go there is little variation in the local examples analysed from 

 those analysed in other countries. 



Again the figures for the oj^sters examined appeared to vary 

 only slightly from the French and Portuguese (21) as far as 

 percentage went, although the total P.^O,, per oyster is very 

 much smaller in the Australian than the others, owing to their 

 small size. Thus : — 



Average % P.jO,; in dried oyster 

 Average wt. of dried oyster 

 P2O5 contained in one average oy-ster 

 Average % P20g in shell 



