Calendar: 1860-1861 Page 492

APPLIED SCIENCES 493 What minerals yield the chief supply of potash From what sources is it obtained for use in the arts How are the salts of potash distinguished from those of soda Mention the materials employed in the manufacture of flint glass Describe the chemical changes which occur By what agent3 is glass most readily corroded Describe the manufacture and purification of sal ammoniac What is plaster of Paris How is it obtained Specify the peculiar effect produced by different degrees of heat upon it What saline bodies are practically applied to modify these effects and what influence on its properties do they exhibit What are the principal materials used as building stones State their chemical composition How may some estimate of the power of building stone to resist weathering be obtained Describe the properties of cast iron both physical and chemical Sketch the theory of the blast furnace What are the essential conditions for ensuring the con- sumption of smoke Give the tests for lime zinc alumina and magnesia when in solution together IX -fMtneralogi antt rologo Make list of the stratified fossiliferous Rocks found in the British Isles and give the names of some of the most im- portant of their Fossils Give list of the different Minerals obtained from the Carboniferous Rocks of Great Britain and state the annual value of the most important Arrange the following Rocks-Basalt Chalk Clay-slate Gneiss Granite Greenstone Mica-slate Obsidian Oolite Porphyry Serpentine Syenite Sandstone Trachyte-into the