and some other Animal Fluids. 1 i3 



Jution about four parts of boiling water, and from sixteen to 

 twenty parts of water of the temperature of 60". They are 

 sparingly soluble in boiling alcohol, but again deposited as 

 the solution cools. At common temperatures alcohol ex- 

 erts no action upon them. The taste of their aqueous so- 

 lution is extremely sweet. By nitric acid they are con- 

 verted into a while powder of very small solubility, and 

 having the properties of saccholactic acid, as described by 

 Scheele*. 



The form of the crystals I could not accurately ascertain 

 even with the help of considerable magnifiers. In one in- 

 stance they appeared oblique six-sided prisms, but their 

 terminations were indistinct. 



Some of the crystals heated upon a piece of platina ia 

 the flame of a spirit lamp, fused, exhaled an odour similar 

 • to that of sugar of milk, and burnt away without leaving 

 the smallest perceptible residuum. 



3. The destructive distillation of the serous part of chyle 

 afforded a minute quantity of charcoal, with traces of phos- 

 phate of lime and of muriate of soda and carbonate of sodaa 



SECTION in. 



Analysis of Lymph. 



The fluid found in the thoracic duct of animals that have 

 been kept for twenty-four hours without food, is perfectly 

 transparent and colourless, and seems to differ in no re- 

 spect from that which is contained in the lymphatic ves- 

 sels. It may therefore be regarded as pure lymph. 



It has the following properties f : 



1. It is miscible in every proportion with water. 



2. It produces no change in veeetable colours. 



3. It is neither coagulated by heat, nor acids, nor alco- 

 hol, but is generally rendered slightly turbid by the last re- 

 agent. 



4.- When evaporated to dryness, the residuum is very 

 small in quantity, and slightly affects the colour of violet 

 paper, changing it to green. 



5. By incineration in a platina crucible the residuum i« 

 found to contain a muiute portion of muriate of soda j but 

 I could not discover in it the slightest indications of iron. 



6. In the examination of this fluid, I availed myself with 

 some advantage of those modes of electro-chemical ana- 



• Chemical I-'ssays, No. xvii. 



f The term lymph has been applied indiscriminately to the tears, to the 

 matter of encysicd dropiy, and to some other animal fluids. Vide Ailcin'» 

 Dictidnary of Chemistry and Mineralogy, art. Lyr/iph. 



Vol. 40. No. 172. August 1812. H lysisj 



