The elements of that mathematical art commonly called algebra, expounded in two books / By John Kersey ... To which is added lectures read in the School of Geometry in Oxford, concerning the geometrical construction of algebraical equations; and the numerical resolution of the same by the compendium of logarithms. By Dr. Edmund Halley.

  • John Kersey the elder
Date:
1717
Catalogue details

Licence: Public Domain Mark

Credit: The elements of that mathematical art commonly called algebra, expounded in two books / By John Kersey ... To which is added lectures read in the School of Geometry in Oxford, concerning the geometrical construction of algebraical equations; and the numerical resolution of the same by the compendium of logarithms. By Dr. Edmund Halley. Source: Wellcome Collection.

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    Multiplication in indifferent to begin the work either at the right Hand or the left, it will be eafier to write forward than backward. And as to the plating of the particular Produfts, there is iorwara tnan . Order lherein . for whether they be written upon one, no neceffity thev regain the fame values, and mull: by Algebraical Addition ircoSd nfoR neS fo mate [he total Product An/therefore you may ei- 1 ,!rirP fhe mrricular Produfts all upon one Line when there is room, or elfe up- rl'er write t p uhi particular Multipliers, fetting like Products ( whefothey ££ ) under one another to facilitate their Addition , or otherwife, as you fliall find it molt convenient. More samples of Multiplication in Compound Algelraic Integers, according to SeCt. IV. Multiplicand, » Multiplicator, ProduCt, a\e 2 b—id 1 5^—8 d f J 6 da-\-de 2 bf—zfd 1 log—48 Multiplicand, Multiplicator, 504-3c 30-2C 2H? 4 b—6 ►/»■ . ^• 4-1 ^aa-\-^ca —ioc0—6cc M-\-12 b —12b—18 ProduCt, ProduCt > contracted,3 15 a a4- $ca—1 oca—6 w 1500— ca—6cc %bb-\- 12&—12 b—18 8 bb—18 Multiplicand, Multiplicator, 3<&?4*4^e-Wfi 3 dd—ee i] 4- $dddd-\-12dddc\ 3 ddee _-2, ddee— 4 deee — eeee ProduCt, Product \ contracted, 3 $dddd-\-1 lidded 3ddee— 3ddee—^deee—eeee 9^44-12 d*e—4 del—g4 Multiplicand, Multiplicator, ProduCt., Multiplicand, Multiplicator, 4 0004- 300—204*1 act—5 a 4*6 04 0 04” e 04-e a—e aa-\-ac aa\ae -\-ae-\-ee —ae—ee 004- 2 0tf+ ee j aa—ee 4000004* 30000— 2aaa-\- aa —200000— 150004 loaa—5a 4- 240004* 1 800—1204* 6 ProduCt, 400000—1700004* 700*4*2900—1704*6 Again, •