SCHEDULE TWO.

The cell consists of zinc and mercury in a saturated solution of zinc sulphate and mercurous sulphate in water, prepared with mercurous sulphate in excess, and is conveniently contained in a cylindrical glass vessel.

The mercury.-To secure purity it should be first treated with acid in the usual manner, and subsequently distilled in

vacuo.

The zinc.-Take a portion of a rod of pure re-distilled zinc, solder to one end a piece of copper wire, clean the whole with glass paper, carefully removing any loose pieces of the zinc. Just before making up the cell, dip the zinc into dilute sulphuric acid, wash with distilled water, and dry with a clean cloth or filter paper.

The zinc sulphate solution.-Prepare a saturated solution of pure ("pure re-crystallized") zinc sulphate by mixing in a flask distilled water with nearly twice its weight of crystals of pure zinc sulphate, and adding zinc oxide in the proportion of about 2 per cent by weight of the zinc sulphate crystals to neutralise any free acid. The crystals should be dissolved with the aid of gentle heat, but the temperature to which the solution is raised should not exceed 30° C. Mercurous sulphate treated as hereinafter described, should be added in the proportion of about 12 per cent by weight of the zinc sulphate crystals, and the solution filtered, while still warm, into a stock bottle. Crystals should form as it cools.

The mercurous sulphate.—Take mercurous sulphate, purchased as pure, and wash it thoroughly with cold distilled water by agitation in a bottle; drain off the water, and repeat the process at least twice. After the last washing, drain off as much of the water as possible.

Mix the washed mercurous sulphate with the zinc sulphate solution, adding sufficient crystals of zinc sulphate from the stock bottle to ensure saturation, and a small quantity of pure mercury. Shake these up well together to form a paste of the consistence of cream. Heat the paste, but not above a temperature of 30° C. Keep the paste for an hour at this temperature, agitating it from time to time; then allow it to cool, continuing to shake it occasionally while cooling. Crystals of zinc sulphate should then be distinctly visible, and should be distributed throughout the mass. If this is not the case, add more crystals from the stock bottle, and repeat the whole process. This method ensures the formation of a saturated solution of zinc and mercurous sulphates in water.

Contact is made with the mercury by means of a platinum wire about No. 22 gauge. This is protected from contact with the other materials of the cell by being sealed in a glass tube. The ends of the wire project from the ends of the tube; one end forms the terminal; the other end and a portion of the glass tube dip into the mercury.

OTTAWA: Printed by SAMUEL EDWARD DAWSON, Law Printer to the Queen's most Excellent Majesty.

CHAP. 39.

An Act respecting the Inspection of Electric Light.

[Assented to 23rd July, 1894.]

HER Majesty, by and with the advice and consent of the

Senate and House of Commons of Canada, enacts as follows:

1. This Act may be cited as The Electric Light Inspection Short title. Act.

Interpreta

2. In this Act, unless the context otherwise requires,(a.) The expression "contractors" means any person under- tion. taking to furnish electricity to any purchaser for lighting pur

poses.

"Contrac

tors."

(b.) The expression "purchaser" means any person to whom "Purchaser." electricity is furnished for lighting purposes.

(c.) The expression "meter" means electric light meter, "Meter." and includes every kind of machine, apparatus, or instrument used for measuring the quantity of electrical energy furnished

to the purchaser.

(d.) The expression "purchaser's terminals " means the "Purchaser's ends of the electric lines or conductors situate upon the pur- terminals.' chaser's premises at which the supply of electricity is delivered from the service lines.

(e.) The expression "department department" means the Department "Departof Inland Revenue.

ment.

(f.) The expression "controller" "controller" means the controller of "Controller."

inland revenue.

3. The commercial unit of supply of electrical energy shall Unit of supbe one thousand watt-hours, or the equivalent thereof in Ply. ampere-hours.

4. Before commencing to give a supply of electrical energy Pressure to be for illuminating purposes to any purchaser, the contractors declared. shall declare to such purchaser the constant pressure at which they propose to supply energy at his terminals.

2. The variation of pressure at any purchaser's terminals Percentage of shall not under any conditions of the supply which the pur- allowed.

variation

Accidental variation.

Responsibility of contractors

of lines.

chaser is entitled to receive, nor at any time, exceed three per cent from the declared constant pressure, whether such variation is due to the resistance of the service lines or apparatus belonging to the contractors, or to any action or effect produced by such apparatus, for which the purchaser cannot be shown to be responsible, or partly to a variation of pressure in the distributing mains from which the supply is taken.

3. The contractors shall not be liable for any variation of pressure caused by unavoidable accident to the generating plant or apparatus, or by the uncontrollable condition of the ele

ments.

5. The contractors shall be responsible for all electric lines, for condition fittings and apparatus, belonging to them or under their control upon the purchaser's premises, being maintained in a proper condition and in all respects fit for supplying energy; but they shall not be responsible for any damages arising from the use of the electric current in lines, fittings and apparatus not belonging to them or under their control.

Inspection on purchaser's premises in

ous connection with earth.

6. If the contractors are reasonably satisfied, after making all proper examination by testing or otherwise, that at some case of danger part of a circuit a connection with the earth exists of such resistance as to be a source of danger, and that such connection does not exist at any part of the circuit belonging to the contractors, any officer of the contractors duly authorized by them in writing, may, for the purpose of discovering whether such connection with the earth exists at any part of the wires. upon any purchaser's premises, at all reasonable times, after giving one hour's notice of his intention to do so, enter such premises and disconnect the purchaser's wires from the service lines, and may require the purchaser to permit him to inspect and test the wires and fittings belonging to the purchaser and forming part of the circuit.

Discontinu

in such case.

7. If on such testing the officer discovers that a connection ance of supply exists between the purchaser's wires and the earth, and that such connection has an electrical resistance not exceeding five thousand ohms, or if the purchaser does not give all due facilities for such inspection and testing, the contractors shall forthwith discontinue the supply of energy to his premises, giving immediate notice of such discontinuance to the purchaser, and shall not recommence such supply until they are satisfied that such connection with the earth has been removed.

Testing by in

chaser is dis

satisfied.

S. If any purchaser is dissatisfied with the action of the spector if pur contractors, either as to the mode of making the test or in discontinuing the supply of electricity to his premises, the wires and fittings of such purchaser may, on his application to the department, be tested for the existence of such connection with the earth by an electric light inspector.

default as to

9. If the contractors make default in complying with the Penalty for requirements of any of the foregoing sections as to supply, supply. they shall be liable for every such default to a penalty not exceeding twenty dollars for every day during which such default continues.

10. Any person who maliciously or fraudulently abstracts, Theft of eleccauses to be wasted or diverted, consumes or uses any electri- tricity. city shall be deemed guilty of theft and punishable accordingly.

premises.

11. Any officer of the contractors authorized in writing by Power to enthe inspector may, at all reasonable times, enter any premises ter purchaser's to which electricity is or has been supplied by the contractors, in order to inspect their electric wires, meters, accumulators, fittings, works and apparatus for the supply of electricity, or for the purpose of ascertaining the quantity of electricity consumed or supplied, or, where a supply of electricity is no longer required or the contractors are authorized to take away and cut off the supply of electricity from any premises, for the purpose of removing any electric lines, accumulators, fittings, works and apparatus belonging to the contractors, repairing all damage caused by such entry, inspection or removal.

12. Inspectors of weights and measures, or of gas, or other Electric light officers of inland revenue, may, after examination as to their inspectors. qualification, be appointed and may act as electric light inspectors under this Act; but no such inspector shall be a seller of electricity or electric meters, or be employed by any person or company supplying electricity or meters; and no electric inspector shall repair or adjust any meter inspected or verified by him.

13. The amount of electrical energy supplied by contractors Meters to be to any purchaser under this Act for lighting purposes, or the certified. electrical quantity contained in such supply, shall, if the purchaser so desires, be ascertained by means of a suitable meter, duly certified in accordance with regulations established under the authority of this Act.

left with pur

2. Whenever a reading of a meter is taken by the contrac- Duplicate of tors for the purpose of establishing a charge upon the purchaser, reading to be the contractors shall cause a duplicate of such reading to be left chaser. with the purchaser.

14. No electric light meter shall be fixed for use which has Meters to be not been verified and stamped as hereinafter provided.

verified and stamped.

dials.

15. No meter shall be fixed for use unless it plainly indi- Recording cates by means of suitable dials the amount of current or energy passing to the purchaser's wires.

2. Electrolytic meters at present in use may be continued Description of unless objected to by the purchaser; but the number of such meter. meters shall not be added to, and all renewals of meters shall

be made by the substitution of the direct-reading types.