Calendar: 1865-1866 Page 548

550 APPLIED SCIENCES Show how the ink is fed to and distributed over the types in the cylinder printing machine Describe the construction and action of the compensating balance used in chronometers Describe the construction of the dead beat and anchor 'scapements Compare their action Describe the method of making stained glass for windows How are glass tubes made Describe the process of making hollow bricks and drain pipes III -Cf a1uiitrg solution of 71 grains of sulphate of sodium is mixed with one of chloride of barium in excess Represent in symbols the change which occurs and give the quantities of each of the new products supposing all the compounds to be anhydrous The specific gravity of lead is ll-34 lump of the metal weighs in water 830 grains What will it weigh in air Give an account of the mode in which the proportion of oxygen nitrogen carbonic anhydride and aqueous vapour may be determined in atmospheric air What volume of oxygen would he contained in 000 cubic feet of air What are the principal forms in which carbon is known give some account of each of them How is the exact composi- tion of carbonic anhydride determined In what forms is sulphur met with in nature How is it purified for use Describe its two most important oxides and the acids which they form give the formulae of the other acid oxides of sulphur Describe the preparation of hydrochloric acid and give in symbols the effects produced by heating it with metallic iron sesquioxide of iron protosulphide of iron and binoxide of manganese IV -CijcmtStrp Give the composition of ammonia by weight and by volume What is its specific gravity State in symbols the action of sul- phuretted hydrogen hydrochloric acid and ferric chloride upon