Calendar: 1869-1870 Page 525

APPLIED SCIENCES 527 How is oxalic acid obtained describe the effect of sul- phuric acid upon it By what teats may it be distinguished What is the composition of hydrocyanic acid how is it obtained and by what tests is its presence recognized How are the alkalies discriminated as class from other bases Ρ Describe the preparation of caustic potash and of potassic carbonate Enumerate the alkaline earths and state how each may be distinguished from the others What is the chemical difference between hydraulic lime and ordinary lime How may hydraulic lime be prepared artificially VII -&rti of Construction Describe and compare superior pit sand and inferior Thames sand How to form river wall of concrete How does exposed timber-work usually decay and how is this usually prevented Explain in precise detail tbe formula -j and distinguish Β from SW What is the principle of mixing in iron Sketch and explain the section of cast-iron girder Distinguish between sandstone and an oolite in substance and wear Sketch and explain in principle the section of main sewer Design plate iron girder 20 feet long to break with 2Γ tons on the middle 10 Sketch foot-bridge of timber on stone abutments 40 feet apart 11 Sketch the section of the front of dwelling-house of fcur stories and basement to show the support of floors and roof 12 Design roof of 30 feet span with timber principals