Calendar: 1881-1882 Page 682

AND ENTRANCE EXHIBITIONS 683 volume the coefficient of linear expansion being 000012 for cubic litre of dry air at temperature of 10 and under pressure equal to 760 millimetres of mercury is heated to 100 and the pressure diminished to 700 milli- metres Determine the increase of volume in cubic centi- metres Describe Regnault's hygrometer and explain how it is used for determining the hygrometric state of the air Define specific heat substance weighing 500 grammes is heated to 90 and plunged into 500 grammes of water at 10 Find the temperature after immersion assuming the mean specific heat of the substance between and 100 to be 113 Give an account of one of Joule's determinations of th mechanical equivalent of heat and state the result arrived at Explain the action of Leyden Jar What elements are contained in glass Which of them do you regard as an indispensable constituent Point out the chemical changes which take place when carbon sulphur and phosphorus are heated in air Give the composition of the gas which is obtained by heating oxalic acid with sulphuric acid Mention the substances which are most commonly used as bleaching agents Under what chemical conditions does an explosion occur Illustrate by an example Write the chemical formula of chalk What would be the weight of pound of chalk after being thoroughly calcined in kiln What are the characteristic properties of alkalies and acids respectively Name the gases which are produced by the action of steam upon red-hot charcoal