52 List of Chemicals. 
fully conduct all tests as given below, small glass-stop- 
pered bottles containing the following reagents and 
chemicals are required. ‘They may be procured from 
the various dealers in chemical supplies, and ordered as 
needed : 
LIST OF CHEMICALS, REAGENTS, ETC. 
(1) NH:OH—Ammonium Hydrate. 
(2) NH:Cl—Ammonic Chloride. 
(3) NaC:HsO2—Sodic Acetate. 
(4) H:S—Sulphuretted Hydrogen. (Prepared 
by adding dilute Sulphuric acid to pure iron sulphide. 
The gas thus generated should be washed by passing it 
through water before using.) 
(5) HCl—Hydrochloric Acid. 
(6) AgNO:—Silver Nitrate. 
(?7) KOH—Potassium Hydrate. 
(8) NaOH—Sodium Hydrate. 
(9) Sb:Ox—Antimony Terozide. - 
(10) Sb:Os—Antimony Pentozxide. 
(11) CuSO—Copper Sulphate. 
(12) HNO:s—WNitric Acid. 
(13) H:SO—Sulphuric Acid. 
(14) (NH:):S—Ammonium Sulphide. 
(15) SnCl—Tin Bi-chloride. 
(16). KCN—Cyanide of Potassium. 
(17) Mn0O:—Manganese Diowide. 
(18) BaCl:—Barium Dichloride. 
(19) CaCl—Calcium Dichloride. 
(20) Turmeric Paper (Indicator). 
(21) Intmus Paper (Indicator). 
(22) Metallic Zine. 
(23) PbO—(Litharge) Lead Oxide. 
(24) H(C:Hs0:)—Acetic Acid. 
' (25) H:Ox—Hydrogen Peroxide. 
