Practical navigation, or, An introduction to the whole art : containing the doctrine of plain and spherical triangles : plain, mercator, great-circle sailing, and astronomical problems : the use of divers instruments ... : sundry useful tables in navigation, and a table of 10,000 logarithms, and of the logarithm-sines, tangents, and secants / by John Seller.

  • Seller, John, active 1658-1698.
Date:
1694
Catalogue details

Licence: Public Domain Mark

Credit: Practical navigation, or, An introduction to the whole art : containing the doctrine of plain and spherical triangles : plain, mercator, great-circle sailing, and astronomical problems : the use of divers instruments ... : sundry useful tables in navigation, and a table of 10,000 logarithms, and of the logarithm-sines, tangents, and secants / by John Seller. Source: Wellcome Collection.

    20/532 (page 6)
    OF Gduitiptication, SECT, y. of MULTIPLICATION. Is Uhiplication teaches how to encreafe the greater of two Num- bers given, as often as there are Units in the leffers and: ferves inftead of many Additions, 2. In Multiplication there are three Parts. 1. The Multiplicand, or Number.to be multiplied, a2. Dhe Multiplier, or Number by which it is thultiplied,. _ 3». The Produ@& made by the Multiplication... Example. 792 Multiplicand 32 Multiplier. Multiplication T, able. ©] 8 fre] a4 3a| 4/4 9 \9 118] 27 136/45 The Ufe of the foregoing Table. Note; That on:the Topand left fide.are placed the 9. Digits,- which ‘are-to-be multiplied one'by anothers and. in the common Angle of meeting, yeu-will-have the Produ, . Exar~