Senior Examination Papers, 1890. 
427 
B. Agricultural Chemistry. 
Thursday, May loth, from 2 p.m. to 5 p.m. 
1. Write a paper on the humus of soil. Describe (1) its origin and nature ; 
(2) the conditions which favour its increase, and diminution ; (3) the part which 
it plays in the soil. 
2. Describe the special characteristics of the manure yielded by horses, 
cattle, sheep, and pigs. What are the conditions which determine the produc- 
tion of (1) a valuable, and (2) a poor, manure? What losses is farmyard 
manure liable to, and how are they best prevented? 
3. Write a paper on the agricultural chemistry of the mangel crop. To 
what extent is it an exhaustive crop ? What are its natural capacities for 
drawing food from the soil ? What should be the characteristics of the manure 
when a full crop is desired ? How is the composition of the root affected by 
(1) thick or thin planting ; (2) character of manure ; (3) character of season ? 
4. What do you understand by the following terms ? 
Monocalcic phosphate. Amide. 
Reduced phosphate. Lignin. 
Meat guano. Malt dust. 
Cinereal. Peptone. 
5. A horse is fed with hay containing in ICO parts — albuminoids 103, fat 
2 - 6, soluble carbohydrates 416, fibre 25 0. The digestion coefficients are for 
albuminoids 57, fat 24, carbohydrates 55, fibre 36. Calculate the albuminoid 
ratio of the diet. 
6. What is the nature of rennet ? How is it prepared ? Describe its action 
on milk, and the influence of external conditions upon this action. 
EXAMINATION IN MENSURATION AND LAND SURVEYING. 
Maximum Number op Marks, 200. Pass Number, 100. 
Tuesday, May 13th, from 10 a.m. till 1 p.m. 
1. What is the length of a chain in yards, and of a link in inches ? What 
is the advantage of using a chain for making the measurements from which 
areas of land are to be obtained ? 
A rectangular piece of land is 42 chains 15 links long, and 13 chains 73 links 
wide ; find its area (a) in acres, (h) in square yards. 
2. Draw a straight line A C, and in it take two points, N and M; AN = 
107 ft,, A M = 230ft, ; AC = 412 ft.; N D and MB are perpendiculars to AC, 
drawn to the right and left respectively of a man looking from A to C ; N D = 
184 ft., M B = 155 ft, ; draw A B C D to a scale of 75 ft. to an inch, and note the 
length of B C, and the number of degrees in the angle ADC. 
3. A hundredweight of seven-strand straining wire is 650 ft. long ; find the 
diameter of each wire, assuming the specific gravity to be 8. 
N.B. — You may take 7ir = 22 ; the calculation will be simplified by the use 
of logarithms. 
4. State the common practical rule for finding the volume of a piece of round 
timber. Apply it to find the volume of the trunk of a tree, which is 45 ft, long 
and 1 56 in. round in the middle. 
For what reasons would you expect the result to be inexact ? On which 
side would the error commonly be ? 
5. A hole is dug in level ground ; its top is a rectangle 100 ft. long and 
50 ft. wide ; its bottom is an horizontal rectangle, with its sides parallel to the 
sides of the top, 80 ft. long and 40 ft. wide ; its depth is 8 ft. ; find the number 
of cubic yards moved in digging it. 
Draw a plan of the hole, assuming that two of the adjacent sides of the 
hole are vertical. State whether in this case the volume would differ from 
