Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 328
ses, cooking, heating electric cars,etc. Rods of metal are welded by pressing them togetherwith sufficient force while a strong current of electricityis passed through them. Heat is developed at the pointof junction, where the resistance is the greatest, and themetals are softened and become welded… … Fio. 259. of gunpowder, being careful that no more powder is near by.Stand away from the gunpowder and close the circuit. What is the result? 320 PHYSICAL SCIENCE. IV.—Lighting Effects. 11. Incandescent Lamp-Experiment 1, page 318, illustrates the principle of theincandescent lamp. It consists…
Physics
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