SECT. 3] 



AND EIGHTEENTH CENTURIES 



223 



EXCERPTS FROM J. F. JOHN'S CHEMISCHE TABELLEN OF 1814 {cont.) 



Substance or liquid 

 investigated 



Amniotic liquid (man) 



Cheesy material, given 

 off into the amniotic 

 liquid by the body of the 

 foetus (man) 



Embryonic tissue-juice 

 (man) 



Amniotic liquid (cow) 



Amniotic and allantoic 

 liquids (cow) 



Composition 



It is miscible with water 

 It is coagulable by tincture of gall 

 It is coagulable by alcohol 

 It is coagulable by alumina 

 It is coagulable by spirits of nitre 

 Free mineral alkali, water, albumin- 

 ous substance, common salt 

 Much water, very little common 

 salt, fire-stable alkali, phosphoric 

 acid, some earth, and oxyde of 

 iron 



Much water, a lymphatic coagulum, 

 common salt, salmiac, a trace of 

 phosphate of lime 

 Sp. g. 1-005. Albuminous matter, 

 soda, muriate of soda, phosphate of 

 lime, the rest is water 



Animal slime, and a characteristic 

 fatty material, or rather an albu- 

 minous material tending to fat, car- 

 bonate of lime 



It contains hydrofluoric acid 



Water, much sulphate of soda, 

 phosphate of lime and talc, an 

 animal substance soluble in water, 

 insoluble in spirits of wine, and 

 not forming a combination with 

 tannic acid, a crystalline amniotic 

 acid 



The liquid of the allantois is very 

 different quantitatively in the dif- 

 ferent periods of pregnancy, as also 

 in the qualitative aspect of its com- 

 position. First it is crystalline and 

 colourless, then it gets yellowish, 

 and finally a dark reddish-brown. 

 But it remains watery all the time 

 and never has the property possessed 

 by the amniotic liquid, of becoming 

 at last quite slimy even to the point 

 of showing fibres in it. During the 

 last months the hippomanes appear 

 in it, these are soft and yet tough. 

 The quantity of this liquid is much 

 greater at the end than at the be- 

 ginning. Alcohol precipitates from 

 it a very large amount of a reddish 

 substance; sulphate of baryta, tar- 

 taric acid, and carbonate of lime 

 give a large precipitate. These re- 

 agents do not change the amniotic 

 fluid at all. 1000 gm. Uq. allant. 

 gave 20-25 gm. solid residue, 

 1000 gm. liq. amnii gave lo-i i gm. 

 solid residue 



Scheele 



Vauquelin & 

 Buniva 



Vauquelin & 

 Buniva 



Berzelius 



Buniva & 

 Vauquelin 



Dzondi 



1807 



1806 



