civ Agricultural Education — Examination Papers^ 1885. 
the bank ; the slopes of the inclined faces are 1 vertical to 1 horizontal; 
draw to scale a plan of the heap, and find its volume. 
5. A B is a line, marked on a level piece of ground by two pegs 
A and B ; P is a third peg, not in the line A B ; explain a method 
by which you could drive a fourth peg Q into the ground, so that 
the line P Q should be parallel to A B, supposing that you are pro- 
vided with nothing more than a measuring tape, pegs, and a mallet. 
G. What is a contour or contour-line ? 
On a piece of an ordnance map a stream is denoted by a line, 
which we will call A B ; a contour line crosses it at a point C between 
A and B, and runs along not far from the stream and on both sides 
of it, from C to points near B. Would you infer from this that the 
stream flows from A to B, or would you infer that it flows from B to 
A ? Give a reason for the inference which you draw. 
7. Draw to a scale of 500 feet to the inch a quadrilateral A B C D, 
Laving given A B = 2520 feet, B C = 1950 feet, C D = 1555 feet, 
D A = 2745 feet, and the diagonal D B = 3155 feet, and find its area 
from the diagram. 
8. In the last question suppose the diagram to represent the plan 
of a piece of ground, and that A B on the ground is level, that the 
line represented in plan by B C has a slope upward from B of 1 
vertical to 15 horizontal, and that the line represented in plan by 
C D has a slope downward from C of 1 vertical to 20 horizontal ; 
find the slopes of the lines (assuming that they have a uniform slope) 
wliose plans are A D and the diagonal A C. 
9. Calculate, as accurately as your tables allow, the number of 
degrees, minutes, and seconds in the angle of inclination of a line to 
the horizon which has a slope of 1 vertical to 15 horizontal. 
10. B and C are two points not visible from each other, whose 
distances from a third point A are known, viz., A B = 743 yards, 
AC = 857 yards; the angle BAG is measured and found to equal 
105° 18' ; calculate the distance B C. 
EXAMINATION IN MECHANICS AND NATURAL 
PHILOSOPHY. 
Maximum Number of Maekb, 200. Pass Numbeb, 100. 
Thursday, May lith,from 10 a.m. till 1p.m. 
1. If a body is suspended by one point, without other support, 
and is allowed to come to rest, what will be the position of the centre 
of gravity ? In that position will the body be in stable or unstable 
equilibrium, and why ? 
2. A piece of wire of uniform density is bent so as to form three 
sides of a square, where is its centre of gravity ? If the wire in this 
