318 Dr. Scherer's Abstract of 



I. 11. III. 



Carbon 55-94.0 56-735 56-237 



Hydrogen ... 7-679 7-689 7-532 



Nitrogen 15-871 15-871 15-871 



Oxygen 20-510 19-705 20-360 



and the serum pellicle, 



Carbon 55-774"] 



NJ,tr::;:::::;::: iIS? 'o°-»»« 



Oxygen 20*874j 



The formation of the pellicle is attended with absorption 

 of oxygen. 



The casein thus formed artificially is found to possess, 

 like natural uncoagulated casein, the property of dissolving 

 in boiling alcohol and separating in flocks on cooling. 



Dr. Scherer finds that the solubility of casein is due to the 

 existence of a large quantity of alkali, and that if this be neu- 

 ti'alized by an acid the casein sepai'ates, coagulated, and then 

 gives but 2 or 3 per cent, of an ash which consists of phos- 

 phate of lime, and is not at all alkaline : whilst soluble casein, 

 and also the casein precipitated by alcohol, gives 7 or 8 per 

 cent, of the strongly alkaline ash. 



Dr. Scherer has, in repeating Sanson's experiments, fully 

 proved that the iron in the blood particles is independent of 

 the colouring substance, and has obtained the latter intense 

 red, and yet giving a white ash perfectly free from iron. 



Composition ofFibrine. — In this and the subsequent series 

 of analyses. Dr. Scherer generally used for determining the 

 carbon and hydrogen, combustion with chromate of lead, and 

 a stream of oxygen gas at the conclusion. For the nitrogen 

 the new method of Will and Plantamour was employed. 



Fibrine from venous human blood, fully freed from colour- 

 ing matter and fat, gave as follows : — 



0*518 gramme gave 0-007 ash = 1-3 per cent. 



I. 0-291 (without ashes 0-289) gave 0*561 carbonic acid, 

 and 0-179 water. 



Carbonic acid. Water. 



II. 0-334 gramme gave 0-650 0-210 



III. 0-280 0-550 0-180 



IV. 0-352 0-688 0-214 



V. 0-288 (or without ashes 0-225) gave 0-559 chloride of 

 platina and ammonium, equivalent to 15 "8 17 per cent, of ni- 

 trogen. 



VI. 0-324 of substance gave 0-807 of the chloride of platina 

 and ammonium, or 15-763 per cent, of nitrogen. 



