the 19th century, practical mechanical tools, called planimeters, were patented for determin-ing the area of planar regions. There is an extensive literature devoted to the mathematics of …
Planimeters | National Museum of American History
In 1854 Jacob Amsler, a Swiss teacher and mathematician, devised a planimeter that did not need the cones or wheel-and-disc constructions of earlier instruments such as 1983.0474.02 …
(PDF) Planimeters and integraphs in the 19th century. before the ...
2010年1月1日 · First invented in the beginning of the 19th century, they were essentially developed after the theoretical legitimization of the polar planimeter by Jakob Amsler (1823 …
- [PDF]
American Planimeters
While there were quite a few interesting area mea-suring inventions made during the 19th century, it is the Amsler polar planimeter design that came to dominate the marketplace. Jacob Amsler …
What are the earliest known proofs that planimeters 'work'?
2021年2月16日 · Amsler was a Swiss mathematician who invented the polar planimeter in 1854, and was likely familiar with Gauss's work on differential geometry from his studies at …
(PDF) PLANIMETERS AND INTEGRAPHS IN THE 19th CENTURY.
PLANIMETERS AND INTEGRAPHS IN THE 19th CENTURY. BEFORE THE DIFFERENTIAL ANALYSER. PLANIMETERS AND INTEGRAPHS IN THE 19th CENTURY. BEFORE THE …
of the 19th century, they were essentially developed after the theoretical legitimization of the polar planimeter by Jakob Amsler (1823-1912) after 1856. This small and practical instrument …
Online Museum Collections in the Mathematics Classroom – …
A planimeter is a 19th-century invention that measures the area inside a closed curve. The user sets up the device and traces the curve with a metal point. Moving the tracer arm displaces a …
Linear - National Museum of American History
In 1875, Danish mathematician and cavalry officer Holger Prytz came up with a final form of planimeter—the hatchet planimeter. It simply consists of a rod with a tracer point at one end …
PLANIMETERS AND INTEGRAPHS IN THE 19th CENTURY. BEFORE …
2010年1月1日 · First invented in the beginning of the 19th century, they were essentially developed after the theoretical legitimization of the polar planimeter by Jakob Amsler (1823 …
- 某些结果已被删除