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At the further end of the saloon the president, assisted by four secretaries, occupied a large platform. His chair, supported by a carved gun-carriage, was modeled upon the ponderous proportions of a 32-inch mortar.
On the outside of both scribe circles of the size of the bearing tubes, and other circles at the proper radius for the bolt hole centres. On the outside of D scribe two circles of 2-inch and 1-11/16-inch radius, between which the steam pipe will lie. On the inside of D scribe a circle of 1-27/32-inch radius for the steam ports. On the outside of E mark a 7/8-inch circle for the exhaust pipe.
Barbicane, wishing to know the effect of the shock at the moment of the projectile's departure, sent for a 32-inch mortar from Pensacola Arsenal. It was installed upon the quay of Hillisboro Harbour, in order that the bomb might fall into the sea, and the shock of its fall be deadened. He only wished to experiment upon the shock of its departure, not that of its arrival.
Put the ends and flue temporarily in place, mark off the position of y, and drill half a dozen 5/32-inch screw holes through y and the flue. Also drill screw holes to hold the collar to the boiler top. The steam-pipe is a circle of 5/16-inch copper tube, having one end closed, and a number of small holes bored in the upper side to collect the steam from many points at once.
His chair, placed on a carved gun-carriage, was modelled upon the powerful proportions of a 32-inch mortar; it was pointed at an angle of 90 degs., and hung upon trunnions so that the president could use it as a rocking-chair, very agreeable in great heat.
He'd have towed Cecil to his club, fed him Martinis and vintage stuff until he couldn't have told a 32-inch shell from an ashcan; handed him a smooth spiel about capacity, strain tests, shipping facilities, and so on, and dumped him at his hotel entirely satisfied that all was well, without having been off Fifth Avenue.
File and rub the sides until no projections are visible. Then drill twelve 3/32-inch holes right through the three parts. After separating them, the holes in the walls and what will be the cover must be enlarged to an easy fit for 1/8-inch bolts, and the valve plate tapped. Now drill 3/16-inch holes centrally through the ends of the walls for the valve rod.
Crank shaft, 5 inches long; 1/2 inch diameter. Centre line of piston rod, 1-1/4 inches laterally from near edge of bed; 1-5/8 inches from valve-rod centre line; 1-5/8 inches vertically above bed. Centre line of crank shaft, 10-3/8 inches from cross centre line of cylinder. Bearings, 1 inch long. Eccentric, 9/32-inch throw. Fly wheel, diameter, 7-1/2 inches; width, 1 inch; weight, 6 lbs.
Solder must be run well into the joints, as these will have to stand all the longitudinal working strain. The next step is the fitting of the cylinder covers. If you can obtain two stout brass discs 2-1/8 inches in diameter, some trouble will be saved; otherwise you must cut them out of 3/32-inch plate.
Make matching marks on the edges. Unsolder the covers, enlarge the holes in them to take 5/32-inch screws; and tap the holes in the standards. This method will ensure the holes being in line, besides avoiding the trouble of marking off the standards separately. Bore a 1/4-inch hole in the centre of one cover be sure that it is the right one for the piston rod.
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