The engineer's common-place book of practical reference

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Page 11 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Page 39 - RULE. — Multiply the difference between the root of the integer part of the given number, and the root of the next higher integer number, by the decimal part of the given number, and add the product to the root of the integer number given, the sum is the root required.
Page 52 - To compute the power of an Engine from the Indicator Diagram- — Divide the diagram in the direction of its length into any convenient number of equal parts, through which draw lines at right angles to the atmospheric line, add together the lengths of all the spaces taken in measurements corresponding with the scale on the indicator, divide the sum by the number of spaces, and the quotient is the mean effective pressure on the piston in Ibs. per square inch. Let the result of the preceding diagram...
Page 40 - Again ; let the greatest elastic force of steam in the cylinder of an engine equal 48 Ibs. per square inch, and let it be cut off from entering the cylinder when the piston has moved 4i inches, the whole stroke being 18 ; required an equivalent force of the steam throughout the whole stroke.
Page 61 - The throw of an eccentric, and the travel of the valve in a steam-engine, also the length of one lever for communicating motion to the valve, being given, to determine the proper length for the other. On any right line, as AB, describe a circle AD equal to the throw of eccentric and travel of valve; then from C as a centre, with a radius equal to the length of lever given, cut the line AB, as at d, on which describe a circle, equal to the throw of eccentric or travel of valve, as may be required...
Page 36 - Some of the properties of a circle. 1. It is the most capacious of all plane figures, or contains the greatest area within the same perimeter or outline. 2. The areas of circles are to each other as the squares of their diameters, or of their radii. 3. Any circle whose diameter is double that of another, contains four times the area of the other. 4. The area of a circle is equal to the area of a triangle whose base is equal to the circumference, and perpendicular...
Page 15 - ... conducted in this manner, goes on tranquilly, and is attended with a yellowish blue flame and a very feeble light. The phenomena are different when the hydrogen is previously mixed with a due quantity of atmospheric air. The approach of flame not only sets fire to the gas near it, but the whole is kindled at the same instant ; a flash of light passes through the mixture, which is followed by a violent explosion. The best proportion for the experiment is two measures of hydrogen, to five or six...
Page 22 - Divide the length of the stroke by the distance or space into which the dense steam is admitted, and find the hyperbolic logarithm of the quotient, to which add 1 ; and the sum is the ratio of the gain.
Page 11 - The old ale gallon contained 282 cubic inches ; and The old wine gallon 231. The French litre, or standard measure of capacity for liquids, contains 61.028 cubic inches, or about .453 of our imperial gallon.
Page 65 - Divide 1400 times the number of horses' power the engine is equal to by the diameter of the wheel in feet, multiplied by the number of revolutions per minute, and the quotient is the weight of the ring or rim of the wheel, in cwts. EXAMPLE. — Required the...

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