298 PHYSIOLOGICAL CHEMISTRY. 



water decreases. The absolute quantity of bodies soluble in water 

 increases with the development, while their relative quantities, as 

 compared to the other solids, continually decreases. The quantity 

 of bodies soluble in alcohol quickly increases. A specially impor- 

 tant increase is noticed in the fat, whose quantity is not very great 

 even on the fourteenth day, but after that it becomes considerable. 

 The quantity of albuminous bodies and albuminoid insoluble in water 

 grows continually and regularly in such a way that their absolute 

 quantity increases while their relative quantity remains nearly un- 

 changed. LIEBEBMANN found no glutin in the embryo of the hen. 

 The embryo does not contain any gelatin-forming substance until 

 the tenth day, and from the fourteenth day on it contains a body 

 which when boiled with water gives a substance similar to chondrin. 

 A body similar to mucin occurs in the embryo when about six days 

 old, but then disappears. The quantity of haemoglobin shows a 

 continual increase compared to the weight of the body. LIEBER- 

 MANN found that the relationship of the haemoglobin to the bodily 

 weight was 1: 728 on the eleventh day and 1: 421 on the twenty- 

 first day. 



The tissue of the placenta has not thus far been the subject of detailed 

 chemical investigations. In the edges of the placenta of bitches and of cats a 

 crystallizable orange-colored pigment (bilirubin ?) has been found, and also a 

 green amorphous pigment, MECKEL'S Tuxmatochlorin, which is considered as 

 biliverdin by ETTI. PREYER questions the identity of these pigments with 

 biliverdin. 



From the cotyledons of the placenta in ruminants a white or faint rose- 

 colored creamy fluid, the uterine milk, can be obtained by pressure. It is al 

 kaline in reaction, but becomes acid quickly. Its specific gravity is 1.033- 

 1.040. It contains as form-elements fat-globules, small granules, and epithe- 

 lium-cells. We have found 81.2-120.9 p. m. solids, 61.2-105.6 p. m. albumin, 

 about 10 p. m. fat, and 3.7-8.2 p. m. ash in the uterine milk. 



The fluid occurring in the so-called GRAPE-MOLE (mola racemosa) has a 

 low specific gravity, 1.009-1.012, and 19.4-26.3 p. m. solids with 9-10 p. m. 

 protein bodies and 6-7 p. m. ash. 



The amniotic fluid is in women thin, whitish, or pale yellow ; 

 sometimes it is somewhat yellowish brown and cloudy. White 

 flakes separate. The form-elements are mucus-corpuscles, epithe- 

 lium-cells, fat-drops, and lanugo hair. The odor is stale, the reaction 

 neutral or faintly alkaline. The specific gravity is 1.002-1.028. 



The amniotic fluid contains the constituents of ordinary transu- 

 dations. The amount of solids at birth is hardly 20 p. m. In the 

 earlier stages of pregnancy the fluid contains more solids, especially 



