Calendar: 1882-1883 Page 694

WARNEFORD SCHOLARSHIPS 691 degrees it was ripened into pearl which falling into the hands of diver after long series of adventures is at present the famous pearl which is fixed on the top of the Persian diadem XII -CJjntttettj How can it be proved by experiment that the material of candle is not destroyed in the act of combustion Express in chemical equation the change which takes place when steam is passed over red-hot iron Describe the process adopted in the laboratory for preparing nitric acid State the composition of ammonia gas by weight and by volume What is the difference in chemical composition between potassic chlorate and potassic chloride Why is sodic hyposulphite so much used by photo- graphers Name the chief constituent of the ash obtained by burning bones Explain the construction and action of Bunsen's gas- burner Give the names and chemical formulae of the principal ores of iron 10 How much air is required for the complete combustion of litre of hydrogen Ί 11 For Sambrooke Exhibition only Ascertain the com- position of the salts marked each containing one metal and one acid-radical ΧΙΠ -$i £tcg vessel 200 centimetres deep 50 centimetres wide and 400 centimetres long is filled with water determine the pres- sure on the base and on each of the four sides Determine also the proportion of the pressure on the lower and upper halves of each side χ