Calendar: 1883-1884 Page 671

CLOTHWORKERS' SCIENCE EXHIBITION 677 What effect will an increase of temperature have on the reading of barometer supposing the atmospheric pressure to remain constant 10 Describe method of measuring the coefficient of expansion of metal rod solid at when immersed in water displaces 500 cubic inches at 30 it displaces 503 cubic inches Find its mean coefficient of linear expansion between and Point out the difference between wave of pound wave of light and wave traversing stretched string What circumstances affect the velocity of sound in air and in what way do they affect it candle is placed at short distance in front of thick plate glass mirror silvered at the back Describe and explain what is seen on looking obliquely into the mirror Explain the action of convex lens held close to tho eye and employed to view small object placed within the ו -C---- principal focus 10 The image of lamp flame is to be formed upon screen at distance of feet by means of convex lens What is the greatest focal length admissible With lens of such focal length what relation will the size of the image bear to the size of the flame VI 00I0Q£ Dissect out the digestive organs of the cockroach separate off and display the mouth-organs Name and briefly describe specimens to Give short account of the microscopic specimens to