84 BLOOD. 



Determine its quantity by washing, extracting with 

 boiling alcohol, and weighing the dried precipitate. 

 It will probably amount to between 7 9 and 9 '8 % 

 of the serum. 



19. Evaporate the filtrate from the albumen pre- 

 cipitate to a low bulk, and test for tyrosine, leucine, 

 kreatinine, urea, glukose, and extractive acids. 



20. Burn the residue and examine the white ash, 

 which should amount to about 0'7 to 0*8 % of 

 the serum. Study the prevalence of sodium over 

 potassium salts ; of chlorides over sulphates ; of 

 alkalies over earths ; prove the presence of phosphoric 

 acid. 



2.1. Dry a weighed quantity of serum, and determine 

 total quantity of dry residue. 



22. Dilute clear serum with ten volumes of water, 

 and pass a current of carbonic anhydride through the 

 solution. Let stand and allow the fibrino ^plastic 

 substance (also termed paraglobuline) to deposit. 



23. Dilute the solution, from which fibrino -plastic 

 matter has been deposited, by an addition of ten 

 volumes of water, and neutralise most cautiously with 

 very dilute acetic acid. A milky turbidity and a 

 subsequent adhesive deposit are formed and constitute 

 fibrinogenous matter. 



24. Add to hydrocele fluid, or to the fluid of peri- 

 cardial, pleural or peritoneal exudations, a small 

 quantity of fibrino -plastic substance, and observe that 

 they immediately deposit fibrine. 



25. Shake some defibrinated blood in a' stoppered 

 bottle with much air or oxygen, and observe that it 



