William Oughtred (1574 - 1660) was an English mathematician and scholar. He used previous work by Napier, Gunter, and Delamain design a circular slide rule. This made approximate calculations much easier and faster than other methods of the time. The slide rule was reinvented in a sliding bar format in the 1650s. In addition to making calculations easier, the slide rule made teaching of logarithms more understandable.
William Ougthered invent Slide Rule in 1622!
AnswerThe slide rule was invented by William Oughtred in 1625. AnswerWe do not know the precise year. A circular slide rule was invented by William Oughtred some time about 1620, and a design of a similar slide rule by Delamain was printed in about 1630. The straight slide rule seems to have been invented later, some time around 1650.
Before the invention of the pocket or handheld calculator, the slide rule was a popular tool for calculations. William Oughtred made the first slide rule by inscribing logarithms on wood or ivory. The use of slide rules continued until about 1974, after which electronic calculators became more popular.
John Jesse Clark has written: 'The slide rule and logarithmic tables, including a ten-place table of logarithms' -- subject(s): Logarithms, Slide-rule 'The slide rule' -- subject(s): Slide-rule
Yes, it is a point on the slide rule. It is exact and not a decimal number.
The slide rule was invented by William Oughtred some time about 1620 or 1625.
the 7x7 rule means theres no more then 7 bullets on a slide and no more then 7 sentences on a slide
Stefan Rudolf has written: 'The modern slide rule' -- subject(s): Slide-rule
The slide rule was invented during the period of 1620-1650 by William Oughtred, based on the earlier invention of the Gunter scale by Edmund Gunter. The original slide rule is said to have been circular, and come about 1620 or 1625. The straight slide rule is said to have been invented around 1650.
Gunter
Slide rules were replaced by pocket calculators. This happened very suddenly as soon as the price of the calculator became comparable with the slide rule. The market for the slide rule dried up almost completely, in much of the world, in less than a year. Some specialty slide rules have survived, however.