Agriciilhtral Education — Examination Papers, 1887. xxi 
7. Explain the policj^ of crop rotations — tlie advantage of taking 
grain and green crops after one another in rotation, instead of each 
in succession, always on its own plot of ground. 
III.— LIVE-STOCK. 
8. Explain the fertilising influence of the sheep-fold. 
9. In what respects do milk selling, butter dairying, and the 
cheese manufacture, ditfer in their influence on the fertility of the 
farm 1 
10. Considering all England as a farm, carrying an immense 
head of stock, and receiving annually enormous quantities of im- 
ported food and manure, why is it not continually increasing in 
fertility 1 
B. ELEMENTARY CHEMISTRY. 
November 8, 1887. 
{Three hours allowed.) 
1. What features does water exhibit at the following tempera- 
tures— 0° C, 4° C, 100° C. 1 What is meant by the latent heat of 
steam ? 
2. What are the principal characteristics which distinguish the 
so-called metallic and non-metallic bodies ? Is the distinction au 
absolute one ? 
3. What do you understand by the term chemical action 1 Illus- 
trate your reply by examples. 
4. Describe the preparation of Chlorine. What are its principal 
uses in commerce ? 
5. The following four salts are given you, viz. Sulphate of Am- 
monia ; Sulphate of Soda ; Sulphate of Potash ; Sulphate of Mag- 
nesia : how would you distinguish between them ? 
6. Describe the structure of the flame of a candle. Point out the 
special features of each portion of the flame. 
7. Explain the separation of chemical substances by the mode 
termed dialysis. Give an example, 
