# The Practical Model Calculator: For the Engineer, Mechanic, Machinist, Manufacturer of Engine-work, Naval Architect, Miner, and Millwright

H.C. Baird, 1851 - 293 σεκΏδερ

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### Ργλοωικό αποσπήσλατα

”εκΏδα 18 - Operations with Fractions A) To change a mixed number to an improper fraction, simply multiply the whole number by the denominator of the fraction and add the numerator.
”εκΏδα 10 - Los números cardinales 0: zero 1: one 2: two 3: three 4: four 5: five 6: six 7: seven 8: eight 9: nine 10: ten 11: eleven 12: twelve 13: thirteen 14: fourteen 15: fifteen 16: sixteen 17: seventeen 18: eighteen 19: nineteen 20: twenty...
”εκΏδα 238 - Rule : Multiply the square of the diameter of the cylinder in inches by the cube root of the stroke in feet, and divide the product by 47. The quotient is the nominal horse-power of the engine.
”εκΏδα 131 - Practical, Short and Direct Method of Calculating the Logarithm of any given Number, and the Number corresponding to any given Logarithm.
”εκΏδα 19 - To reduce fractions of different denominators to equivalent fractions having a common denominator. RULE.! Multiply each numerator into all the denominators except its own for a new numerator, and all the denominators together for a common denominator.
”εκΏδα 27 - Multiply each term in the multiplicand, beginning at the lowest, by the feet in the multiplier, and write...
”εκΏδα 44 - If the errors are alike, divide the difference of the products by the difference of the errors, and the quotient will be the answer.
”εκΏδα 28 - INVOLUTION. INVOLUTION is the raising of Powers from any given number, as a root. A Power is a quantity produced by multiplying any given number, called the Root, a certain number of times continually by itself. Thus, 2 = 2 is the root, or first power of 2.
”εκΏδα 16 - When there are more than two numbers, find the greatest common measure of two of them, as before ; then...
”εκΏδα 19 - To reduce a whole number to an equivalent fraction, having a given denominator. RULE. Multiply the whole number by the given denominator, and place the product over the said denominator, and it will form the fraction required.