Palmer's Pocket Scale Circular Slide Rule. Here is a very rare Palmer's Pocket Scale book with circular slide rule. The title page states, PALMER'S POCKET SCALE WITH RULES FOR ITS USE IN SOLVING ARITHMETICAL AND GEOMETRICAL PROBLEMS. The date on the inside is 1845. It is in fair condition showing the signs of age, including a loose binding, spotting, discoloration, bumps, tears, loss to the cover and to some of the pages.
None of the page loss affects the printing, which appears complete on a quick look through. The book measures just under 6 inches tall by just under 4 inches wide. The sliderule has a diameter of approximately 2.5 inches. I think there was a a metal knob on it originally which is missing. Some of the printing from inside of the book: Entered according to Act of Congress, in the year 1844, by AARON PALMER, In the Clerk's Office of the District Court of Massachusetts.
PALMER'S ENDLESS SELF-COMPUTING SCALE. The proprietors of this invaluable work, beg leave to present the public with the following notice: This Scale (the result of three years' incessant labor) is designed as an assistant in all arithmetical calculations. The simplicity, rapidity, and accuracy of its results have astonished our best mathematicians.
It consists of a logarithmic combination of numbers, arranged in two or more circles, one of which is made to revolve within the other; which process constantly changes the relation of the figures to each other, and solves an infinite variety of problems. A complete saving of mental labor; for, by the use of this Scale, the most intricate calculations are but a pleasurable exercise of the mind. A great saving of time. Computations requiring from three to four days, are wrought out by this Scale in the incredible short space of one minute.The results of the computations on this Scale are infallible. Error are entirely out of the question, except through sheer carelessness 4th. Mental improvement By the Scale, a knowledge of the philosophy of numbers, and their relation to each other, is soon obtained. So that, in a little time, many of the common calculations are wrought out by the mere exercise of the mind. Please check my other listings for more slide rules and related items. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules".
The seller is "baja_ron" and is located in this country: US. This item can be shipped worldwide.