Calendar: 1865-1866 Page 549

APPLIED SCIENCES 551 its solution in water How is ammonia obtained in the gaseous form Describe the extraction of phosphorus from bone earth Give an account of the extraction of iodine from kelp and state how the iodides are recognized when in solution How are the sulphates nitrates and chlorides distinguished from each other in solution State what is meant by the oxidizing and reducing flame of the blowpipe giving an explanation of the mode of action of each What is Marsh gas Mention its mode of preparation its composition and the results of the detonation of cubic inch of the gas with oxygen with the quantity of oxygen required for complete combustion Practical tontetrg Construct triangle from any two of the following con- ditions Equilateral and of inches area Its sides as and of inches area Its sides at its altitude 2" inches and its vertical angle 40 Draw quadrilateral from the following conditions -sides Α Β Β CD 33 5" diagonal make square and an equilateral triangle equal to this polygon Divide line 375 inches long into two segments such that either The rectangle contained by them may be inches in area- or So that the rectangle under the whole line and the less segment may be equal to the square on the greater Draw two circles of 75 and 1'5 inches radii touching each other and third of inches radius touching them both and containing them within it Prove generally that if be the area of any figure lying in plane inclined at θ to the paper the area of its plan will be equal to cos Θ