Calendar: 1857-1858 Page 403

APPLIED SCIENCES 405 specimens in order to render them useful to more experienced geologists at home Give the crystalline form hardness and specific gravity of the following gems -Diamond Sapphire Topaz Spinel-Ruby Emerald and Tourmaline What are the principal Minerals which enter into the com- position of crystalline rocks How would you readily distinguish Sandstone from Lime- stone Name the Minerals and Fossils on the accompanying tray give the crystalline form of the specimens numbered and III -C&tmustrg What forces are concerned in the production of Capillary action What is the law of its operation Give examples of Capillary action What are the fixed points by which thermometer is graduated Explain why thermometer is less easily rendered correct in its indications at very high and very low temperatures Upon what principle is the specific heat of body ascer- tained Explain the construction and action of Wollaston's Cryo- phorus What is the cause that liquids assume the spheroidal form when thrown on heated surfaces State the Electrical Hypotheses of Franklin and of Dufay Explain the action of the Cylinder Electrical Machine Illustrate the theory of Electrical induction by the process of charging Leyden jar Explain the mode in which the balance is applied to the measurement of Electricity