SECT. 9] PROTEIN METABOLISM 1099 



1 8th day, after which the metanephros continues by itself. For 

 experiments on the excretory powers of the mesonephros in the 

 salamander, Necturus maculosus, see the papers of Dawson and of 

 White & Schmitt. 



Table 1 44. Concentration of constituents in the allantoic liquid of 

 the chick. [Milligrams °/^.) 



Kamei Targonski 



S| II li li I i U li Ih HI 



Day feh h2 ZcJ Z'c < P E- Z S Z E J 5^ g.^ x^ ^ c 



2 — — — — — — — — — — — 



3— _____— — — — — 



4 28 _____ _____ 



5 26 __________ 



6 27 ____- _____ 



7 29 _____ _____ 



8 34 _____ _____ 



9 43 4-6 3-6 i-i 0-8 5-6 — — — — — 



10 55 — — — — — — — — — — 



11 68 _____ 46 18 — 40-2 59-8 



12 85 _____ _____ 



13 106 — — — — — — — — — — 



14 151 41-6 0-6 4-7 3-6 21-2 85 43 42 51-0 49-0 



15 — — — — — — — — — — — 



16 — _____ 92 60 32 65-1 34-9 



17 — 87-1 20-7 8-5 12-5 56-7 — — — — — 



18 — _____ 116 50 — 43-2 56-8 

 19— _____—___ — 

 20 — — — — — — — — — — — 



In the previous discussion, nothing has been said about the other 

 estimates of the urea present in the allantoic fluid. Kamei made a 

 few determinations of ammonia and urea, and the figures are shown 

 in Table 144. On the 14th day he found 21-2 mgm. per cent, of 

 urea in the allantoic fluid, or, taking its volume at 6-5 c.c, 1-28 mgm. 

 absolute, and on the same day 3-4 mgm. per cent, urea in the 

 amniotic fluid, or, its volume being roughly 2 c.c, o-o68 mgm. 

 absolute. The total amount present per embryo was therefore 

 I '35 mgm., a value somewhat in excess of my 14th day determination, 

 namely, 0-5 mgm. Kamei did not state what method he used for his 

 urea determinations. In the same way his estimate of 0-276 mgm. 

 of ammonia in the amniotic and allantoic liquids on the 14th day 



