"brass copper

Thickness in centre

10

the dia. of cyl. Air-pump rod iron the dia. of air-p. Side-rods full of piston-rods.

cross-head ends=

TABLE

Of the Revolutions per Mile of Driving Wheels, and Consumption of Steam and Water for each sized Wheel; taking the

the steam admitted to each cylinder as exactly one cube foot, ut a gross pressure of 98lbs. or 85lbs, on the & the spring balance.

Circumference.

Revolutions
per Mile.

taking Cylinder at

one Cube Foot.

Note. As there are two cylinders at work in a locomotive, consequently there are four cylinders of steam for each revolution.

MODELLING WAX. This is made of white wax, which is melted and mixed with lard to make it malleable. In working it, the tools and the board or stone are moistened with water, to prevent its adhering; it may be colored to any desirable tint with dry color.ama ondot allow udt

TABLE

Of Pressure of Steam, exclusive of that of the Atmosphere.

LINSEED OIL, CLARIFIED, FOR VARNISHES.Heat in a copper boiler 50 gallons of linseed oil to 280° Fah.; add 21 lbs of calcined white vitriol, and keep the oil at the above temperature for half an hour; then remove it from the fire, and in twenty-four hours decant the clear oil, which should stand for a few weeks before it is used for varnish.

TABLE 2MIOTAMA

Of the Pressure on a square and circular Inch, respectively, exerted by the elastic force of Steam at various degrees of Temperature, with Wothe Height of the column of Mercury it will support,fasts us bolise diameld air

1. PRESSURE ON A SQUARE INCH 28 ordersquot e wel zo de at 1: tod shom vitu