1. A farmer has two cubical stacks of hay. The side of one is 3 yards longer than the side of the other, and the difference of their contents is 117 solid yards. Required the side of each. (7) 2. The sum of three numbers in geometrical progression is 13, and the product of the mean and the sum of the extremes is 30. Required the numbers. (7) 3. Two square buildings are paved with stones a foot square each. The side of one building exceeds that of the other by 12 feet, and both pavements taken together contain 2,120 stones. What is the length of the side of each building i (7)

If two sides of a parallelogram be bisected and two lines be drawn from the points of bisection to the opposite angles, these two lines trisect the diagonal.

(5)

LABORATORY STUDENTS.

Final Examination in Chemistry, held 15th June, 1883.

MORNING PAPER. MINERAL CHEMISTRY.

General Instructions.

Three hours are allowed for this examination. You are only permitted to answer four questions. The value attached to the correct answer of each question is indicated by a number placed at the end of the question. Formulæ and equations are to be given wherever possible.

N.B. A full and exact answer will in all cases gain more marks than an inexact or incomplete answer; though in the former case, the question may be the more easy of the two, and have less marks attached to it.

1. If a number of electrolytic cells each containing the solution of a salt of a different metal be arranged in the same voltaic circuit so that the same current passes through all the cells; what is the law regulating the relative quantity of metal deposited in each cell ? Illustrate by examples. (13)

2. What reactions, if any, occur when chlorine is passed into solutions of (1) ammonia, (2) ammonic chloride, (3) cold dilute solution of potassic hydrate, (4) hot concentrated solution of potassic hydrate, (5) sulphuretted hydrogen, (6) arsenious chloride ? (14) 3. Describe the preparation, properties, and reactions of silicic hydride and silicic fluoride. How does the former behave in contact with potassic

hydrate ?

(10) 4. Describe the preparation and properties of carbonic disulphide. How does it behave (1) with solutions of alkaline sulphides, (2) with solutions of alkaline hydrates, and (3) when its vapour is passed over heated calcic hydrate ? (11)

5. Give a general method for obtaining the chlorides of elements from their oxides, especially applicable in the case of those chlorides which are decomposed by water.

(10)

(12)

6. What are the various modifications of phosphoric acid and how are the salts corresponding to these modifications prepared?

7. Describe two processes by which sodic carbonate is prepared on a large scale from sodic chloride.

(11)

(10)

8. Describe the preparation and properties of the oxides of lead.

AFTERNOON PAPER. ORGANIC CHEMISTRY.

[Instructions similar to those for morning paper.]

1. 0-3573 gram of the chloroplatinate of a monacid organic base yielded on ignition 0.1167 gram of platinum. What is the molecular weight of the base? (Atomic weight of Pt.

194.5.)

(10) 2. What are the chief reactions in which the aldehydes and ketones of the fatty series are obtained ? What are the relations of these two classes of

compounds to the alcohols ?

(11)

3. How could you convert ethylene into malic and tartaric acids ? 4. Describe the reactions in which (1) formic acid and (2) allylic alcohol can be obtained from oxalic acid and glycerin.

(11)

(10)

5. Give examples of the action of nitrous acid upon primary, secondary, and tertiary amines of the aromatic series.

6. What is a hydrazine? How are primary and secondary hydrazines obtained?

(12) (11) 7. How may a phenol be converted into (1) a hydroxyaldehyde and (2) a hydroxyacid. This last by a method independent of the oxidation of the aldehyde. (13) 8. Describe a method by which the positions of the substituting atoms or groups in one standard set of 3 disubstitution compounds of benzene may be determined. (14)

DIVISION OFFICERS' EXAMINATION.--FIRST SET.

28th April.

1. What is the duty on a cask of British spirits at 60 o.p., weighing net 11.cwt. 2 qrs. 8lbs., the weight per gallon being 8.286 lbs.

2. If the actual deficiency be three-fourths of the ordinary rate of allowance in each cask, make up the charge of 4 casks of British spirits taken out on 4th November, 1882, viz., 115 6, 884 and 95.3 proof gallons, warehoused 10th May, 1879, 14th November, 1880, and 6th March, 1882, respectively, ordinary 6 o.p. on one year, and 2 per cent. additional for each year after.

3. The total quantity of material used in brewing in the month is 458 quarters 2 bushels and 6 gallons of malt or grain, 8,996 lbs. of sugar, 51,496 lbs. of syrup, 41 lbs. of which equals 28 lbs. of sugar. The total product is 88,100 gallons. Make up the account for duty, also show the product per barrel, or equivalent, and the percentage above or below the deemed produce of 18 gallons per barrel.

4. The quantity of spirits in a cylindrical vessel is 1254-3 proof gallons, the depth 18.5, and the strength 35 6 o.p. What is the area of the vessel ?

5. The encumbrance in a fermenting vessel is a temperating pipe of 35 inches in diameter, extending from the bottom of the second to the top of the fifth frustum of 10 inches; the pipe is 88 feet in length, and is so placed that the lengths in each frustum are in the ratio of 4, 5, 6, and 7. Taking the

circumference of the circle at 3:1416, what is the amount of displacement in each frustum, correct to the hundredth of a gallon?

6. Find the obscuration of a blend of spirits to which two-fifths of its bulk of water has been added, the quantity being 353-4, 271·6, and 450·5, and obscuration 34, 28, and nil respectively.

7. The feints and spirits produced in a period are 8716 5 proof gallons, and the percentage above the attenuation charge is 12.5. Find the attenuation charge and the degrees attenuated for every gallon of spirits and feints produced.

8. The quantity of water necessary to reduce a mixture of 279.5 gallons of spirits at 454 o.p., and 1866 gallons at 11.6 o.p. to a strength of 253 o.p.

9. Find the amount in money and the percentage to the fourth decimal place of the loss sustained on the whole by the Revenue practice of disregarding the decimals beyond the first in bulk and proof of the three full casks of British spirits, contents 65, 72, and 531, and the strengths are 113 o.p., 25.1 o.p. and 247 o.p., respectively.

Oral Questions, 26th April, 1883.

1. Why must the depth of a spirit receiver be at least 15 inches ?

2. What persons may make methylated spirit without taking out a licence ? 3. What is a sale by auction ?

4. From whom may a tobacco manufacturer receive unmanufactured tobacco ?

5. What is the smallest quantity of methylated spirit that may be sent out at one time by a maker, and to what extent may the quantity vary from the requisition ?

6. What would you do if a person offered you tobacco or cigars for sale in the streets?

7. What is the definition of sweets, and finish?

8. Can one game dealer sell to another game dealer?

9. What is the highest rate of spirit licence for a theatre ?

10. Define proof spirits.

11. May a spirit retailer sell spirits in bond?

12. Is a person found removing wash liable to arrest? If so, state your authority.

13. May sugar or molasses be removed from a distillery ?

14. Who may arrest a hawker?

15. Is there any restriction on a game licence granted for a whole year? 16. What persons are liable to a plate licence at the higher rate?

April 27th, 1883.

Give a general account of what is required of a Supervisor in regard to the charging of the duty on spirits, indicating in your opinion the periods when he may most usefully visit the distillery to check operations. Then supposing you, as Supervisor, have found that spirits were being abstracted before reaching the spirit receiver, report the circumstances fully, stating the grounds of your opinion that the distiller was cognizant of the fraud.

April 28th, 1883.

1. Having received an application from a person desirous of commencing business as a maker of methylated spirit and of finish, reply to him giving full information as to the regulations with which he must comply.

2. Report, as Supervisor, a detection, made at your instance by a person not in the Service, of the sale of spirits without licence. State the steps to be taken on receipt of an order to prosecute and, in the event of conviction, to recover the penalty.