216-221] PRELIMINARY EXAMINATION FOR METALS 65 



SULPHUR (S).— Use albumen. 



2l6. Boiled with dilute hydrochloric acid (HC1) and 

 potassic chlorate (KC10 3 ) until the solution is colour- 

 less, sulphuric acid is formed, which may be tested for by 

 barium chloride, when a white precipitate will be formed 

 (i94). 



TABLES FOR QUALITATIVE ANALYSIS 



The following Tables give the order in which the tests should 

 be applied for the metals and acid-radicals treated of in 

 the preceding pages. A number of analyses should be 

 performed by the student including limestone, different 

 varieties of soils, simple and complex manures, and the 

 ashes of plants. 



TABLE I.-PRELIMINARY EXAMINATION OF 

 SOLID SUBSTANCES FOR METALS 



217. Carefully note the appearance of the solid, such as shape, 

 colour, smell, hardness, &c. 



218. If a solution is being analysed it will be necessary, before 

 proceeding with this examination, to evaporate a portion of the liquid 

 to dryness and to use the dry residue. 



219. Before applying the following tests finely powder some of 

 the substance, using an agate mortar if it should be very hard. 



