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Earth and its Chief Motions and the Tangent Index

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Title	Earth and its Chief Motions and the Tangent Index
Subject	Science and Technology Astronomy Inventors Inventions
Place	Westerville (Ohio) Franklin County (Ohio)
Description	Early Otterbein professor and amateur astronomer John Haywood invented the tangent index. "By the aid of this new instrument, the phenomena of the day and night corresponding to the apparent diurnal motion of the sun, can be exhibited to a class in all their variations." He also wrote the Earth and its Chief Motions and the Tangent Index in 1888. The pamphlet is 28 pages and measures 5.2" by 7.7" (13.34 by 19.7 cm). John Haywood (1825-1906) graduated from Oberlin College in 1850 and began teaching mathematics and natural sciences at Otterbein University in 1851. He surveyed the streets of Westerville and became the first mayor when the village was incorporated in 1858, but only served until the spring election of 1858. Haywood kept the official records on the weather conditions in the Westerville vicinity including temperature, rainfall, barometric pressure, wind velocity, and humidity. He also introduced the metric system to the area and provided meters for measuring cloth to local merchants to encourage its adoption. Haywood was also a keen amateur astronomer and the inventor of the tangent index. "By the aid of this new instrument, the phenomena of the day and night corresponding to the apparent diurnal motion of the sun, can be exhibited to a class in all their variations." He was a beloved local figure and after his retirement, he was known as the "Grand Old Man of Otterbein."
Creator	Haywood, John
Date of Original	1888
Collection	John Haywood Collection
Source	Published material
Submitting Institution	Otterbein College
Type	Text

Title	Om2057_1874967_001
Rights	For rights and reproduction requests, go to the Ohio Historical Society's Audiovisual and Graphic Reproduction Services page at http://www.ohiohistory.org/resource/audiovis/photodup.html; Online access is provided for research purposes only. For rights and reproduction requests or more information, go to http://www.ohiohistory.org/images/information
File Name	Om2057_1874967_001.tif
Image Height	2316
Image Width	1561
File Size	1028.467 KB
Full Text	THE EARTH AND ITS CHIEF MOTIONS, THE TANGENT INDEX. JOHN HAYWOOD, Professor of Mathematics, Otterbein UniversUy, Westerville, Ohio. DAYTON, OHIO: Prkss op U. B. Publishing House. 1888.

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Earth and its Chief Motions and the Tangent Index

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Earth and its Chief Motions and the Tangent Index

Earth and its Chief Motions and the Tangent Index

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