76 HANDBOOK FOR BIO-CIIEMICAL LABORATORY. 



the above reagent to the liquid to be tested in a porcelain dish 

 and evaporate the mixture on the water-bath. In the pres- 

 ence of HC1 a delicate rose-red coloration is observed in the 

 residue in the porcelain dish. 



See Teichmann. 

 HAEMOGLOBIN. See Kobert. 



HAINES'S Solution (Glucose). Dissolve 30 grains pure cop- 

 per sulphate in -J- ounce distilled water and add ounce pure 

 glycerin, mix thoroughly and add 5 ounces liquor of potassae. 



HAMMARSTEN'S Test (Globulin). Add powdered magne- 

 sium sulphate to the neutral solution until no more of the 

 salt dissolves. The globulin will be thus precipitated and 

 separated by filtration and washed with a saturated solution 

 of magnesium sulphate. 



HAYEM'S Solution (Blood). This solution is prepared by 

 dissolving 1 grm. sodium chloride, 5 grms. sodium sulphate, 

 0.5 grm. mercuric chloride, in 200 c.c. distilled water. It is 

 used in the microscopical examination of the form elements 

 of the blood. 



HELLER'S Test (Albumin). Float the liquid to be tested 

 on the surface of nitric acid. The presence of albumin is 

 shown by a well-defined white ring between the two liquids. 

 With this test even 0.02 p.m. albumin may be detected with- 

 out difficulty. 



HERZBERG'S Eeagent (Free Inorganic Acids). Paper 

 moistened with a solution of Congo red and dried turns bluish. 

 black or blue when moistened with hydrochloric acid. The 

 delicacy of. this reaction is diminished by the presence of pro- 

 teids or salts in large quantities. 



