Calendar: 1884-1885 Page 678

6 72 TENNANT PRIZE Give the proportions of length thickness and width of wheel teeth for 3-inch pitch What is the breaking strain of piece of yellow deal inches square feet long supported at both ends and loaded in the middle £ettmtttt $νίμ What are tetragonal and right rhombic prisms To what systems do they belong Mention the cleavages which have been observed in galena calcite and selenite Take the specific gravity of the specimen placed before you and show the process Enumerate the steps by which you would attempt the determination of an unknown mineral Explain the action of the blowpipe flames Test by the blowpipe the two substances given for examination and state the methods you adopted and your opinion with regard to the nature of the two substances Find by experiment the hardness of the two minerals given for that purpose What are the chief ores of copper Mention their chemical composition