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It must be observed that in order to reduce the size of the reservoirs, which are carried on the locomotive, the air inside them must be very highly compressed; and that in going from the reservoir into the cylinder it passes through a reducing valve or expander, which keeps the pressure of admission at a definite figure, so that the locomotive can continue working so long as the supply of air contained in the reservoir has not come down to this limiting pressure.
He always came into the shop at the same time half-past two; he always sat in the seat next the window; and three days out of six, he would order the same dinner: a fourpenny beef-steak pudding we called it beef-steak, and, for all practical purposes, it was beef-steak a penny plate of potatoes, and a penny slice of roly-poly pudding 'chest expander' was the name our customers gave it to follow.
As the pressures on the machine are high, the construction must be solid throughout. The lever frame, A, and pivot piece, C, should be of one-inch oak, and the two last be screwed very securely to the baseboard. The inside is cut out with a pad saw, a square notch being formed at the back for the lever to move in. The handles of an old rubber chest expander come in useful for the grips.
This was his book of fairies, his Aesop; his book of wanderings and story, of character and mystery; his revelations, the source of his ideality, the great expander of limitations; his book of love and adventure and war; the book unjudgable and the bed-rock of all literary judgment.
The air does not pass the expander until after it has gone through the boiler already mentioned. Therefore, if the temperature which it assumes in the boiler is 100 deg. Cent. Cent.; and of its total pressure the vapor of water will contribute I atm. and the air 4 atm.
Augustine, and would have delighted that ex-sophist hugely; for, great as he was, and self-denying as he was, he always had a hankering after the dialectic flesh-pots. How he would have rubbed his hands, when Clarian wanted to persuade us that the herb Pantagruelion was no other than Haschish, the expander of souls! Hollo! yonder goes the lad now. I wonder what he is up to.
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