Calendar: 1855-1856 Page 377

APPLIED SCIENCES 373 Describe the Mercurial and Gridiron Compensation Pen- dulums The ratio of the expansion of Iron to Brass being seven to ten find the number of bars in the Compensation Pendulum What is an Escapement What are the defects of the Recoil Escapement How are they obviated in the Dead Beat Escapement Describe the moving parts of common Clock How is motion given to the hands Enumerate the parts in Lever Movement and describe the Lever Escapement Enumerate the parts in Chronometer Escapement Ex- plain the action of this escapement and give some reason for its correct performance What is Jewelling in Watches Show how the Stones are fitted and shaped Where are they placed Describe the process of cleaning watch Describe the Geneva Stop Distinguish between the two methods adopted for causing clock to strike 10 Describe the Compensation Balance Wheel of Chrono- meter How is it made and fitted What are Mean Time Screws 11 Describe the Going Fusee 12 Describe Mr Denison's Escapement and state some of its advantages VII -ConStnicttbc comctin St Draw diagonal scale of to show furlongs poles and yards Divide line 25 inches long into three segments so that four lines being drawn from any point through the extremities and points of division any line drawn parallel to either of the four will be cut in equal segments by the other three Draw circle and an ellipse of equal areas of 2832 square inches the axes of the ellipse being as