Calendar: 1873-1874 Page 561

APPLIED SCIENCES 561 are adopted for determining the specific gravity of liquids solid weighs in air 14 oz in water oz and in certain liquid oz find the specific gravity of the liquid piece of wood weighing ό lb floats in the liquid so that ths of its volume is immersed find the specific gravity of the wood What is the average pressure of the atmosphere per square inch Describe two methods of determining the exact amount of the atmospheric pressure Explain the variations of anno- spheric pressure Describe the construction and explain the action of the fire-engine cylindrical vessel 16 inches long is plunged mouth down- wards into water so that the water in the vessel is 10 feet below the surface to what height in the vessel will the water rise and what will be the elastic force of the air in the vessel Assuming mercury to be taken instead of water to what height would the liquid rise Describe Lavoisier's and Laplace's method of determining the expansion of metal bar What defects are there in this method Find the length of bar of cast iron at temperature of 100 whose length at 18 is feet The coefficient of expansion of cast iron is 00001125 Would solid liquid or gas form the best thermometer for accurate research Give reason for your answer Describe Rutherford's maximum and minimum thermometers Define the terms specific and latent heat substance weighing lb at temperature of 100 is plunged into 20 lb of water at temperature of 20 contained in copper vessel the specific heat of which is 09515 and whose weight is 81b The temperature of the mixture is found to he 25 Find the specific heat of the substance Find also the temperature of the mixture when Jib of ice at is added Describe Regnault's Hygrometer State the advantage which this instrument possesses over Daniell's Hygrometer Κ Ν