soda, 1 lb. of glue, 10 gallons of oil, and 10 gallons of water. Dissolve the soda and glue in the water by heat, then add the oil, and lastly the caoutchouc, stirring them until perfectly incorporated. 5. The following is the ordinary kind of axle-grease in common use:-1 part of fine black lead, ground perfectly smooth, with 4 parts of lard. Some recipes add a little camphor. TABLE Containing the Quantities of Water, in cubic feet, that will be discharged over a Weir per minute, for every inch in its breadth, when the depths of the Water from the surface to the top edge of the wasteboard do not exceed eighteen inches. Cubic feet per TABLE Of the Speed and Force of Wind, at different velocities. Note. The following rule is used to find the force of wind acting perpendicularly upon a surface Multiply the surface in feet by the square of the velocity in feet, and the product by '002288. The result is the force in pounds avoirdupois. TABLE showing the Height of the Boiling Point, Fah., at different. Heights of the Barometer. In a vacuum water boils at 98° to 100°, according as the vacuum is more or less perfect. |