GROWTH. 439 



100 parts of the contents of the un-incubated egg consist of 



1072 parts of fat. 



16*53 matters free from fat, namely 8' 19 in the albumen, and 



83 '6 in the yolk. 

 72'53 water. 



After seven days 9 incubation 100 parts of the inner portion of 

 the egg contained - 



9-32 parts of ether-extract. 



13*94 dry matter, free from fat, of which 8'00 were albumen. 

 7674 water. 



The albumen itself contained 34- 9 per cent, of dry matter, free from fat. 



The thick yolk 16'5 



The liquid yolk 4'4 



The membranes 2'0 



The embryo 77 



The liquor amnii 1'3 



Consequently, during this period, the fat and the solid sub- 

 stances generally have diminished, while the water has been 

 relatively augmented. 



After fourteen days 9 incubation the inner membrane of the 

 shell, the interior parts of the embryo, and, in one case, also the 

 liquor amnii, exhibited an acid reaction. 100 parts of the inner 

 portion of the egg contained 



9'46 parts of ether-extract. 



16'09 ,, dry matter, free from fat, in which there were 77 parts of albumen, 

 74-43 water. 



100 parts of albumen contained 3-3 parts of dry matter, free from fat. 



the yolk 19-3 



membranes 9'1 



embryo 7'2 



liquor amnii 1'4 



After twenty-one days' incubation 



100 parts of the interior of the egg contained 5'68 parts of fat. 



15'44 parts of dry matter, free from fat, of 



which one-sixth consisted of yolk, 

 one-sixth of yolk-membrane, and 

 two-thirds of the embryo. 



78*88 parts of water. 



100 parts of the yolk contained 29'0 parts of dry substance. 

 membrane 20*6 



embryo 14-6 



