Agricultural Education — Examination Papers, 1879. cxlvii 
2. Mention some of the products of the dry Distillation of Peat, 
their composition, properties, and uses. 
3. How do you distinguish Wood Cliarcoal from Animal Charcoal ? 
How do you analyse Animal Charcoal? 
4. What is the cora2)osition of Ammoniacal liquor of gas-works ? 
How do you determine its strength ? How much Sulphate of Ammonia 
can you obtain from 100 gallons of a liquor which contains 12 ounces 
of Carbonate of Ammonia in the gallon ? 
5. What is the composition of Kainite, and how do you determine 
the percentage of Potash which it contains ? 
6. Explain the action of the following substances as disinfectants : — 
Iiinie, Charcoal, Hypochlorite of Lime, Sulphurous Acid, Carbolic 
Acid, Permanganate of Potash. 
7. Explain the chemical changes, if any, that occur in the following 
solutions in the act of percolating cultivated soils : — Nitrate of Soda, 
Sulphate of Ammonia, Chloride of Sodium, Sulphate of Potash, Soluble 
Phosphate of Lime. 
8. What is the composition of Decorticated and Undecorticatcd. 
Cotton Cake, and their comparative feeding and manurial value ? 
9. Write a short paper on the composition of Town-sewage, and its 
application for agricultural purposes. 
II. General Chemistry. 
Wednesday, April dth, from 2 p.m. till 5 p.m. 
1. Describe the chief chemical characters of sulphur, chlorine, and 
zinc, respectively. Name other elements which resemble them 
respectively, and state the points of resenblance. 
2. State the composition of ammonia by weight, and by volume. 
Describe and explain the preparation of ammonia from sal-ammoniac 
(1) in the gaseous condition, (2) in the state in which it is usually 
sold ; and explain the change of temperature which occurs in the latter 
case. 
3. Given a solution of ammonia of which it is required to determine 
the strength, show how to do it, and exjjlain the principles of your 
method. 
4. Describe some one hydro-carbon ; state how it is to be obtained ; 
and calculate the quantity of oxygen required for its complete com- 
bination. 
5. Explain the action of chlorine with (1) sulphuretted hydrogen, 
(2) metallic iron, (3) ferrous sulphate, (4) caustic soda. 
6. State the laws of gaseous diffusion and illustrate them by some 
examples. Show why a fire burning in an ordinary open fireplace- 
serves to keep the atmosphere of the room sweet, and why a fire in a 
close iron st,ove does not produce such an effect. 
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