Select mechanical exercises: shewing how to construct different clocks, orreries, and sun-dials. On plain and easy principles. With several miscellaneous articles, and new tables. I, for expeditiously computing the time of any new or full moon within ... 6,000 years before and after the 18th century ... II. For graduating and examining the usual lines ... To which is prefixed, a short account of the life of the author / by James Ferguson.

  • Ferguson, James, 1710-1776.
Date:
1778
Catalogue details

Licence: Public Domain Mark

Credit: Select mechanical exercises: shewing how to construct different clocks, orreries, and sun-dials. On plain and easy principles. With several miscellaneous articles, and new tables. I, for expeditiously computing the time of any new or full moon within ... 6,000 years before and after the 18th century ... II. For graduating and examining the usual lines ... To which is prefixed, a short account of the life of the author / by James Ferguson. Source: Wellcome Collection.

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    figned number; and we are told by Dr. Wallis, in the 2d volume of his mathematical works, that an antilo- garithmic Canon, or one to find as readily the number correfponding to every logarithm, was begun by Mr. Harriot the algebraift'(who died in 1621) and completed by Mr. Walter Warner, the editor of Harriot’s works, before 1640; which ingenious per- | formance it feems was loft, for want of encouragement to publith it. A {mall fpecimen of fuch numbers ° was publifhed in the Philofophical Tranfactions, for the year 1714, by Mr. Long of Oxford ; but it was not till 1742 that a complete antilogarith- mic Canon was, publifhed, by Mr. James Dodfon, wherein he has com- | puted the numbers correfponding to every logarithm from 1 to 100000, tQ - eleven places of figurrs. | The logarithmic numbers were dif. pofed on ftraight lines by Gunter in, 1623, and hence the Gunter’s Scale, by ek si 1627;.0n two rulers fliding again{i