Calendar: 1887-1888 Page 693

APPLIED SCIENCES 697 Name the chief ores of iron give their formulae and point out the richest and purest In providing water supply for dwelling what particulars as to its chemical composition require especial attention If Ca 40 Ρ 31 Ο 16 what is the percentage cf phosphorus in bone phosphate Ca3 P04 How would you proceed to test for arsenic in wall- paper What is the difference in the chemical composition of the chief varieties of coal What is the general chemical process involved in the development of the latent image Describe fully the chemical changes taking place in de- velopment by ferrous oxalate Mention what circumstances retard development by alkaline pyrogallol or ferrous oxalate How may they be rectified Describe the chemical changes taking place during the intensification of gelatine plate by mercuric chloride Describe the characters of print after toning and fixing which has been taken from weak negative iHetallurgi What are the principal inorganic substances you would expect to find in coal Explain the effect of each on the practical value of coal In comparing good fireclay with bad fireclay what differences in composition would you expect to find In what ways would those differences have originated What is tool steel How is it ordinarily made and tempered