Agricultural Education — Examination Papers, 1872. Ixxxvii 
5. What is the amount of Nitrogen in 
100 lbs. of Nitrate of Soda. 
„ Nitrate of Potash. 
„ Sulphate of Ammonia. 
„ Chloride of Ammonia. 
6. How do you best prevent the loss of fertilizing matters in 
making farm-yard manure ? Mention in general terms the differences 
in the composition of fresh and rotten dung. 
7. What is the composition of Peruvian Guano? How can you 
ascertain whether it is genuine or adulterated? How should it be 
applied to the land, and for what crops is it most suitable ? 
8. What is the composition and feeding value of malt-dust, rice- 
meal, bran, and brewer's grains ? 
9. Write a short paper on the principles which ought to guide the 
farmer in the selection of food for calves, store cattle, fattening beasts 
and milk-cows. 
EXAMINATION IN MECHANICS AND NATURAL 
PHILOSOPHY. 
Maximum Numbeb op Marks 200. Pass Number 100. j 
Thursday, April 18/7i, from 10 a.m. till 1 p.m. 
1. If two given forces act on a point, what is the method of finding 
the single force that would balance them ? 
Suppose the forces to be of 5 and 7 urji*:s i-espectively, and to act iu 
directions at right angles to each other ; show by a figure how the 
force acts which exactly balances them, and determine in any way its 
magnitude and direction. 
2. In the case of a single fixed pulley the power is said to equal the 
weight ; on what suppositions would this be strictly true ? 
Given, two pulleys in separate blocks : show by diagrams various 
ways of combining them, and mention the advantage obtained in each 
way. 
3. A rectangular block of stone 2 feet square and 4 feet high weighs 
a ton : if it stands upright on a horizontal plane what is the smallest 
force necessary to overthrow it ? If it were lying lengthwise on the 
horizontal plane, what would be the smallest force needed to bring it 
into an upright position ? Why is it that in raising the block, its 
tendency to slide does not ordiuarily show itself till it has been raised 
through a considerable angle ? 
4. A horse is known to do 10 million units of work in a day ; it is 
found that by means of certain machinery he raises 70 loa Is of lOOO lbs. 
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