unds and called powers. of the arms. in regard to mine La Motte, he says the “Granite is every- An even length lever divides or multiplies by two. where near the surface,” and therefore intimates that the The excess which gives motion is the same in all; and mo- mines there are about exhausted.… … Explanation Wanted. represented by 1, and the 100 is moved in a radius repre- Above isadiagram of the “ Vertical Multiplier ;” the arrow Messrs. Epitors :— I would likesome one of your nu- heads show the direction in which the levers are moving sented by 3 merous correspondents to give some…
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