Calendar: 1888-1889 Page 792

784 CLOTHWORKERS' AND SAMBROOKE EXHIBITIONS find what would be the volume of the same quantity of air it were measured at 10 and under pressure of 74 centimetres of mercury Describe Regnault's apparatus for determining the specific heat of solids by the method of mixtures An ounce of platinum is heated to the temperature of furnace and then plunged into fourteen ounces of water at 0י the platinum and the water together acquire tern- perature of find the temperature of the furnace taking the specific heat of platinum at 035 Explain fully one of the methods employed by Joule for determining the mechanical equivalent of heat The air on high mountain may be intensely cold although the sun is shining and no cloud exists explain this Part III Describe method of determining the velocity of sound in water shot is fired before cliff and the echo is heard in six seconds find the distance of the cliff Explain clearly the difference between musical sound and noise Describe the construction and explain the action of the Siren How may the instrument be used for determining the pitch of tuning-fork stick is partly immersed in water and inclined to the surface draw the image of the part immersed and trace the course of the pencil from any point of it to the eye Illustrate by means of examples method of deter- mining experimentally the focal length of convex lens of concave lens Explain fully the action of Leyden jar battery is connected with tangent galvanometer and is found to produce deflection of 60 resistance of ohms is then introduced into the circuit and the deflection falls to 45 Determine the combined resistance of battery and galvanometer