1813.] Chemical Properties of Animal Fluids, 385 



coagulate by mere boiling, but it gradually becomes turbid, and 

 during the evaporation a coagulated mass collects. This appears 

 to be albumen, but it has a sulphur-yellow colour. It is com- 

 posed of 



Water 98S-20 



Albumen 1 '66 



Muriate of potass and soda 7*09 



Lactate of soda and its animal matter . . 2*32 



Soda 0-28 



Animal matter only soluble in water,") 

 with a trace of phosphates J 



0-.35 



1000-00 



The fluid whose analysis is here given was that of hydro- 

 cephalus,* which probably approaches nearer than any other of 

 the morbid effused fluids to the natural state, on account of the 

 short duration of the disease, and the little time to which the 

 fluid is exposed to spontaneous change within the ventricles of 

 the brain. The other dropsical fluids are in general more con- 

 centrated, which may arise either from the mere consequence of 

 being long kept, or from the transudation of the serum of the 

 blood that always occurs in the last stages of dropsy, and appears 

 also to take place in the urine and cellular membrane. 



5. The Humors of the Eye. 



The quantity of these fluids that can be procured is so small 

 that it is not easy to obtain a very exact analysis of them. How- 

 ever, my experiments have shown me that they bear a very close 

 affinity with the other membranous fluids. Those of the eye are 

 distinguished by being perfectly transparent and colourless; the 

 other membranous fluids having a yellowish tinge. The humors 



i 

 » It gives me much pleasure a»nin to fall into the track of Dr. Marcel's 

 labours, who has analyzed many of these fluids with results so nearly ap- 

 proaching mj own at to in- a considerable confirmation of their accuracy, 

 particularly a- oar experiments wire nude nearly at the same time, and with- 

 out any knowledge of each other's operations. The following are Dr. Marcel's 

 jcmlls : — 



Fluid of Fluid of 



Spina hifida. Hydrocephalus internus. 



Water 088 80 090*80 



Mm -o-euractive matter, &C. 2:80 1*18 



Muriates, Sic 7*65 6*64 



Bubcarbon teofsoda 1*35 1*24 



Pho ; ()".() () I) 



I - ob erre that the circumstance of Dr. Marcel's having found a greater 

 itj of soda i ipwli l > the decomposition of the lac, ate. a» irelltu t*> 



tin- |n earn c u< iJ. 



Vol. II, 2 U 



