Calendar: 1852-1853 Page 342

338 APPLIED SCIENCES State the principle upon which the Leyden jar is con- structed Explain the process of charging it Define the term Chemical Equivalent and exemplify its meaning Specify and explain the principal laws of Chemical Com bination rv -Cfjemfettg Give proofs that Water is compound body How may its components be obtained in state of purity Describe the characters of each What compounds does Nitrogen form with Hydrogen Describe the chemical properties of the most important of them and the method of preparing it Describe the process by which Chlorine is obtained What are its leading properties How is Sulphuretted Hydrogen procured What is the usual test of its presence Mention its chief natural sources Give the tests for Sulphuric Nitric Carbonic and Phos- phoric acids when in combination What is the composition of Cyanogen What is Prussic acid How is it procured and how recognised Describe the properties of Sulphur and in particular the effects of heat upon it Mention the compounds it forms witli Oxygen How is Phosphuretted Hydrogen obtained What is the cause of its occasional spontaneous inflammability in contact with air -natural $ϊ ί10£ίορϊ If three forces keep point at rest show that they are pro- 0rtional to the sides of certain triangle and state how that triangle is described