Agricultural Education. 221 



The examination papers set in the two special subjects are 

 appended to this Paper. 



Of the 120 candidates one was rejected for copying-. 



On the whole the examination may be reported to have been 

 a successful one, both as regards the number of candidates, and 

 the way in which the candidates have acquitted themselves. 



Examination Papers set for special Prizes offered for Mechanics 

 and Chemistry applied to Agricii/ture. 



CAMBRIDGE UNIVERSITY LOCAL EXAMINATIONS. 



S^Kciul Examination for Prizes (jiven liy the Iloyul Agricultural tiociefy of 



England. 



Thursday, Dec. 14, 1865. 2 p.m. to 1 r.M. 

 MECHANICS. 



1. Defiue the term " centre of gravity," and explain why a heavy 

 body placed on a horizontal plane will not be at rest iniless the vertical 

 line through its centre of gravity falls within the figure formed on the 

 horizontal plane by the points or lines of support. 



Why is it necessary for a man to lean forwards when carrying a 

 heavy load on his back? 



2. Exi^lain the terms " force " and " pressure," and illustrate your 

 explanation by examples. What is meant by the decomposition of a 

 force V Illustrate this by describing the action of the wind in turning 

 a windmill. 



3. Defiue a lever, and describe the different kinds of levers. 



State the positions of the power, fidcrum, and weight (or resistance) 

 in the following implements, considered as levers: — 1, a crowbar; 2, 

 a shovel ; 3, a fork ; 4, a scythe ; 5, clipping-shears for sheep-shearing ; 

 6, a common hammer when used for drawing out a nail ; 7, a chaff- 

 cutter. 



4. If two men carry a weight slung from a pole which rests on their 

 shoulders, and if one of the men be stronger than the other, where 

 should the weight be shmg? 



Would any change be necessary from the circumstance of one man 

 being taller than the other'? 



A heavy weight lies on the ground, and two ropes of equal lengths 

 are attached to it ; two men, of equal size and strength, take hold of 

 the ends of the ropes, and then step backwards in opposite directions, 

 pulling against each other ; having given the greatest pulling force 

 which each man can exert, find the greatest height above the ground 

 to which they can raise and at which they can hold up the weight. 



5. Explain the nature of friction, and describe its action, 1st, in a 

 man's walking or nmuing ; 2nd, in the starting and in the maintaining 

 of the motion of a railway train. 



Why does a man who jimips out of a carriage in rapid motion fall 



