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He stopped before a little glass door at the end, tapped lightly, and entered. Grace Galt, copy-writer, looked up, frowning a little. Then she smiled. Miss Galt had a complete layout on the desk before her scrap books, cuts, copy, magazines. There was a little smudge on the end of her nose. Grace Galt was writing about magnetos.

Back of him stood shining shapes that reflected his glory in enamel, and brass, and glass. His language was floral, but choice; his talk was of gearings and bearings and cylinders and magnetos; his method differed from that of him who went before as the method of a skilled aëronaut differs from that of the man who goes over Niagara in a barrel.

Ignition of the engine is by means of two Bosch ZH6 magnetos, driven at a speed of 2,175 revolutions per minute when the engine is running at its normal speed of 1,450 revolutions. The maximum advance of spark is 12 mm., or 32 degrees before the top dead centre, and the firing order of the cylinders is 1,5,3,6,2,4.

Let us take all the worry and responsibility," she interviewed the firm, and by writing out a cheque disembarrassed herself at a stroke of every anxiety incident to defective magnetos, bad petrol, bad rubber, punctures, driving licences, bursts, collisions, damages, and human chauffeurs. She had all the satisfactions of owning a car without any of the cares.

In general construction this Benz engine was somewhat similar to the Green engine already described; the overhead valves, fitted in the tops of the cylinders, were similarly arranged, as was the cam-shaft; two springs were fitted to each of the valves to guard against the possibility of the engine being put out of action by breakage of one of the springs, and ignition was obtained by two high-tension magnetos giving simultaneous sparks in each cylinder by means of two sparking plugs this dual ignition reduced the possibility of ignition troubles.

Everybody rushed into the squadron, and the trips around the district became reliability runs, with a lone orator addressing the freeborn citizens upon the tariff at each stop, and said freeborn citizens discussing magnetos, springs, and tires with great earnestness and vehemence during the speech. Business always suspends for half a day whenever a new automobile comes to town.

Your exclusive "scientist" and such are most of them to-day may be competent to deal with circles and triangles, with wheels and levers with cells and glands, with germs and bacilli and micro-organisms generally, with magnetos and dynamos, with all the heavenly host if you like, but he has no equipment to deal with man!

"In aeroplane construction," the speaker continued, "where an undetected flaw in her work might mean an aviator's life, woman is doing the carpentry work, building the frame work, making the propellers. They are welding metals, drilling, boring, grinding, milling, even working on the engines and magnetos " A quiver ran up and down Mary's back and her eyes felt wet.

With a motor speed of 1,450 r.p.m., the vertical shaft at the forward end of the motor turns at 2,175 r.p.m., this being the speed of the two magnetos and the water pump. The lower vertical shaft bevel gear and the magneto driving gear are made integral with the vertical driving shaft, which is carried in plain bearings in an aluminium housing.

There are two suction and one pressure type oil pumps driven through gears at half-engine speed, and two 12 spark magnetos, giving 2 sparks in each cylinder.