ugh a and not to be found in every institution of learning. concave reflector is illustrated. The reflector. A, is ad- hole in which the food and water were passed to Mes- To perform most of the experiments possible with con- justed to the trumpet, B, by means of the light of a senger as if he were… … showing that, of the three metals, copper is the best Fig, 5.-TEEVELYAN'S EOCKEE. Fig. l.-BEFLECTION OF LIGHT AND SOVND. conductor of heat and iron the poorest. lamps answer exceedingly well. The projection of im- EASILY MADE TREVELYAN ROCKER. well remembered whistle. The horse raced around the…
