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" ADD the logarithms of the SECOND and THIRD terms, and .from the sum SUBTRACT the logarithm of the FIRST term. "
Rudimentary Treatise on Logarithms - Page 46
by Henry Law - 1853 - 68 pages
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The New Practical Navigator: Being a Complete Epitome of Navigation: to ...

John Hamilton Moore - Nautical astronomy - 1807 - 676 pages
...logarithms of the fécond and third terms together, and from their fum fubtrait the logarithm of the firft term, the remainder will be the logarithm of the fourth term. Or to the complement arithmetic of the logarithm of the firft term, add the logarithms of the fécond...
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The New Practical Navigator: Being a Complete Epitome of Navigation: to ...

John Hamilton Moore - Nautical astronomy - 1810 - 662 pages
...numbers, "Und subtraction that of division, add the logarithms of the second and third terms together, and from their sum subtract the logarithm of the first...remainder will be the logarithm of the fourth term. Or to the complement arithmetic of the logarithm of the first term, add the logarithms of the second and...
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An Introduction to the Theory and Practice of Plane and Spherical ...

Thomas Keith - Navigation - 1810 - 478 pages
...three by logarithms. ROLE. Add the logarithms of the second and third terms together, and from the sum subtract the logarithm of the first term, the...remainder will be the logarithm of the fourth term. What is the 'fourth proportional to '7 '5; 36; W'OOS? Logarithm of 36 = 1-55630 Logarithm of -008 =...
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The Modern Preceptor ; Or, a General Course of Education, Volume 1

John Dougall - 1810 - 734 pages
...then, agreeably to what was said of the nature of logarithms, add the second and third terms together, and from their sum subtract the logarithm of the first term. The remainder being a logarithmic- tangent, we search in the tables of tangents for the number equal or nearest to...
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A Treatise of Plane Trigonometry: To which is Prefixed, a Summary View of ...

Jeremiah Day - Logarithms - 1815 - 172 pages
...logarithms, the fourth term :in a proportion, ADD the logarithms of the SECOND and THIRD terms, and .from the sum SUBTRACT the logarithm of the FIRST term. The remainder will be the logarithm of the term required. Ex. 1. Find a fourth proportional to 7964, 378, and 27960. Numbers. Logarithms. Second...
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Logarithmick Arithmetick: Containing a New and Correct Table of Logarithms ...

Arithmetic - 1818 - 264 pages
...LOGARITHMS. RULE. If the proportion be direct, add the logarithms of the second and third terms, and from the sum subtract the logarithm of the first term. The remainder will be the logarithm of the term required. If the proportion be inrerse, add the logarithms of the first and second terms, and...
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An Introduction to the Theory and Practice of Plain and Spherical ...

Thomas Keith - Navigation - 1826 - 504 pages
...three by logarithms. RULE. Add the logarithms of the second and third terms together, and from the sum subtract the logarithm of the first term, the...remainder will be the logarithm of the fourth term. What is the fourth proportional to '75 ; 36 ; and -008 ? Logarithm of 36= 1-55630 Logarithm of -008...
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Mathematical and Astronomical Tables: For the Use of Students of Mathematics ...

William Galbraith - Astronomy - 1827 - 412 pages
...perform Proportion by Logarithms. RULE.— From the sum of the logarithms of the second and third terms, subtract the logarithm of the first term ; the remainder will be .the logarithm of the answer. Or, instead of subtracting the logarithm of the first term, its arithmetical complement may...
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A System of Geometry and Trigonometry: With a Treatise on Surveying ... in ...

Abel Flint - Surveying - 1830 - 322 pages
...the logarithmic sine, tangent or secant. ADD TOGETHER THE LOGARITHMS OF THE SECOND AND THIRD TEEMS, AND FROM THEIR SUM SUBTRACT THE LOGARITHM OF THE FIRST...THE REMAINDER WILL BE THE LOGARITHM OF THE FOURTH TEEM, WHICH SEEK IN THE TABLES, AND FIND ITS CORRESPONDING NUMBER, OR DECREES AND MINUTES. See the...
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The Edinburgh encyclopaedia, conducted by D. Brewster, Volume 13

Edinburgh encyclopaedia - 1830 - 842 pages
...PROPORTION BY LOGARITHMS. Rulf. — Add together the logarithms of the second and third term, and from the sum subtract the logarithm of the first term, the...remainder will be the logarithm of the fourth term, or answer; or in any compound proportion, add together the logarithms of all the terms to be multiplied,...
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