Webster's Online Dictionary
with Multilingual Thesaurus Translation

 
Earth's largest dictionary with more than 1226 modern languages and Eve!

Definition: HERAPATHITE

Part of Speech Definition
Noun 1. The sulphate of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

 Top

Date "Herapathite" was first used in popular English literature: sometime before 1914. (references)

Note: Herapathite \Her"a*path*ite\, noun. [Named after Dr. Herapath, the discoverer.]. (references)


Extended Definition: HERAPATHITE

Herapathite

Herapathite, or iodoquinine sulfate, is a chemical compound whose crystals are dichroic and thus can be used for polarizing light.

According to Edwin H. Land, it was discovered in 1852 by William Herapath, a doctor in Bristol. One of his pupils found that adding iodine to the urine of a dog that had been fed quinine produced unusual green crystals. Herapath noticed while studying the crystals under a microscope that they appeared to polarize light.

Herapathite's dichroic properties came to the attention of Sir David Brewster, and were later used by Land in 1929 to construct the first type of Polaroid sheet polarizer.

References

  • Land, E.H. (1951). "Some aspects on the development of sheet polarizers". J. Optical Society of America 41 (12), 957-963.


External links


Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Herapathite". Image Credit.
 bookmark   email   print   tweet   facebook  



Topics by Level of Interest: HERAPATHITE

Topics sorted by level of Interest Level (1=low, 600=high)     Topics sorted Alphabetically Level (1=low, 600=high)
Herapathite 3     Herapathite 3

Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).