Calendar: 1870-1871 Page 538

538 APPLIED SCIENCES SECOND EAR Give the methods of lessening the shock on the suction and delivery valves of pumps delivering water from considerable distance to given height Sketch and describe the Cataract י' motion in the single- acting Cornish engine Show what effect the equilibrium passage has on the indicator figure of single-acting Cornish engine Sketch and describe the double-cylinder engine and state its advantages over the single-acting engine What are the laws which regulate the point of cut off in the steam cylinder of an engine By what mechanical contrivances is the point of cut off varied Sketch and describe the various contrivances for "reversing" in the steam engine Sketch and describe the various methods usually adopted in the construction of marine engines with view to economize space Sketch and describe Morgan's paddle wheel 10 Sketch and describe the thrust block and the stern bearing for screw propeller shaft What is the shape of the earth and how was the shape produced State the shape of the orbit described by the earth round the sun and the direction in which the earth moves around the sun State the causes of the alterations in the size of the orbit which constitute eccentricity What is meant by perihelion Were the globe perfect sphere would there be any pre- cession of the equinoxes