422 PHYSIOLOGICAL CHEMISTRY. 



ume of a saturated solution of sodium sulphate or a 10 per cent 

 solution of sodium chloride. Keep the mixture in the cold room 

 for about 24 hours. 



Schiff s Reagent. 1 This reagent consists of a mixture of three 

 volumes of concentrated sulphuric acid and one volume of 10 per 

 cent ferric chloride. 



Schweitzer's Reagent. 2 Add potassium hydroxide to a solution 

 of cupric sulphate which contains some ammonium chloride. Fil- 

 ter off the precipitate of cupric hydroxide, wash it and bring 3 

 grams of the moist cupric hydroxide into solution in a liter of 20 

 per cent ammonium hydroxide. 



Seliwanoff's Reagent. 3 Dissolve 0.05 gram of resorcin in 100 

 c.c. of dilute (1:2) hydrochloric acid. 



Sherrington's Solution. 4 This solution possesses the follow- 

 ing formula : 



Methylene-blue o.i gram. 



Sodium chloride 1.2 gram. 



Neutral potassium oxalate 1.2 gram. 



Distilled water 300.0 grams. 



Sodium Acetate Solution. 5 Dissolve 100 grams of sodium 

 acetate in 800 c.c. of distilled wtaer, add 100 c.c. of 30 per cent 

 acetic acid to the solution and make the volume of the mixture up 

 to i liter with distilled water. 



Sodium Alizarin Sulphonate. 6 Dissolve i gram of sodium aliz- 

 arin sulphonate in 100 c.c. of water. 



Sodium Sulphide Solution. 7 Saturate a one per cent solution 

 of sodium hydroxide with hydrogen sulphide gas and add an equal 

 volume of one per cent sodium hydroxide. 



Solera's Test Paper. 8 Saturate a good quality of filter paper 

 with 0.5 per cent starch paste to which has been added sufficient 

 iodic acid to make a I per cent solution of iodic acid and allow the 

 paper to dry in the air. Cut it in strips of suitable size and pre- 

 serve for use. 



1 Schiff's reaction, pages 159 and 252. 

 " Schweitzer's solubility test, page 50. 



3 Seliwanoff's reaction, pages 35 and 339. 



4 " Blood counting," page 212. 



5 Uranium acetate method, page 389. 

 6 T6pfer's method, page 413. 



7 Kriiger and Schmidt's method, pages 374 and 406. 



8 Solera's reaction, page 57. 



