Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . ts is the same as if we had multiplied by .7854 in the ordinary manner. The process may be rendered clearer if the reason for the method is explained. If we put down the number 7, then one place to the right put it down 7 again; then multiply it by 2 and put product one 7 place to the right, then put this down again one place 14 to the right, and add them all up, we clearly get the 14 number 7854, therefore if we multiply in this order we get the same result as if .7854
Hand book of calculations for engineers and firemen : Relating to the steam engine, the steam boiler, pumps, shafting, etc. . ts is the same as if we had multiplied by .7854 in the ordinary manner. The process may be rendered clearer if the reason for the method is explained. If we put down the number 7, then one place to the right put it down 7 again; then multiply it by 2 and put product one 7 place to the right, then put this down again one place 14 to the right, and add them all up, we clearly get the 14 number 7854, therefore if we multiply in this order we get the same result as if .7854 had been used full 7854 out. Examples. 7 25989712259897125197942451979424 7 323539104323539104 647078208647078208 for Exercise. 1. The diameter of a circle is 5 inches, find its area. Answer, square inches. 2. of a circle is inches, find its area. Answer, square inches. 3. u of a circle is 6J inches, find the area. Answer, square inches. <p6 Hand Book of Calculations. find the Circumference of an Multiply by half the sum of the two diameters; theproduct will be the circumference nearly. Example. What is the circumference of an ellipse whose diameters are9 and 7 feet? 9 7 8 2)16 feet, Answer. 8 Example. What is the circumference of an ellipse whose diameters are5J and 4£ respectively? 5 2) Hand Book of Calculations. 97 find the Area of an Ellipse.
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