Senior Examination Papers, 1876. 
cxv 
6. State which of the ordinary compounds of calcium are soluble 
and which insoluble in water ; give the chemical composition of each ; 
and explain how they may be distinguished from the corresponding 
compounds of magnesium. 
7. Give an explanation of the effects of air and water iipon lead, 
showing in what cases water stored in lead tanks is liable to become 
contaniiaated with lead ; and also how small quantities of lead in 
solution may be detected. 
8. State the composition of the two principal varieties of sugar, 
and explain how they may be distinguished. Explain also the chemi- 
cal changes which occur when an infusion of malt is made in cold or 
tepid water, and how the result is modified by the use of boiling water. 
9. How could you demonstrate the presence of nitrogen in gelatine V 
Of what other elements does it consist ? How may it be distinguished 
from albumen ? 
10. What is the composition of urea ? Explain how it is related to 
ammonia, and how it may be made to yield ammonia. 
II. Agricultural Chemistry. 
Wednesday, April 19th, from 2 p.m. till 5 p.m. 
1. How can you detect the presence of iron-pyrites and of green- 
vitriol in a soil, and counteract the injui'ious effects which these con- 
stituents sometimes produce in soils ? 
2. Mention in general terms the composition of Clay-Marls and 
Chalk-Marls. How do you distinguish a phosphatic fi'om a common 
Chalk-Marl? 
3. How do you distinguish Suffolk from Cambridge Coprolites? 
Describe the various steps in analysing Coprolites and the best way 
of converting Coprolites into Superphosphate. 
4. How do you effect the analysis of a Compound Artificial Manure 
and determine its commercial value. 
5. What are the guarantees which you should require of a Manure- 
dealer in buying : — Nitrate of soda, sulphate of ammonia, shoddy, 
mineral superphosphate, dissolved bones, raw bone-dust and boiled 
bones ? 
6. Mention the principal constituents of barley-meal, beans, wheat? 
and linseed. Describe their chemical properties and functions in 
the animal economy. 
7. What is the general composition of urine, and what changes do 
the compoimds in it severally undergo by keeping? 
8. Write a short paper on the most suitable artificial manures for 
roots on light and on heavy land. 
9. What are the best means of preventing boiler incrustations, 
resulting from the use of hard waters ? 
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