Talk:Andrew Pritchard

Biography Start‑class

	Biography portal This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography articles
Start	This article has been given a rating which conflicts with the project-independent quality rating in the banner shell. Please resolve this conflict if possible.

Christianity: Unitarian Universalism Low‑importance

	Christianity portal This article is within the scope of WikiProject Christianity, a collaborative effort to improve the coverage of Christianity on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ChristianityWikipedia:WikiProject ChristianityTemplate:WikiProject ChristianityChristianity articles
Low	This article has been rated as Low-importance on the project's importance scale.
	This article is supported by Unitarian Universalism work group (assessed as Mid-importance).

Science Low‑importance

	Science portal This article is within the scope of WikiProject Science, a collaborative effort to improve the coverage of Science on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ScienceWikipedia:WikiProject ScienceTemplate:WikiProject Sciencescience articles
Low	This article has been rated as Low-importance on the project's importance scale.

Potential source

Microscopy. 1968 Nov;31:85-94.

The rise and fall of the jewel microscope, 1824-1837.

Turner GL.

Source

Museum of the History of Science, Oxford

Abstract

To increase the resolution of the microscope Sir David Brewster proposed that lenses should be made from materials of high refractive index. In 1824 Dr C.R. Goring commissioned Andrew Pritchard to make a diamond lens, which was delivered at the end of that year. Pritchard made other jewel lenses and devised a stand for use with them. Inhomogeneities in the gem stones and the improvements in the design of objectives published in 1830 by J.J. Lister, led to the abandonment of jewel lenses for microscopy. The properties of twelve jewel and two fused quartz lenses have been measured and are tabulated.

PMID 19938379 [PubMed - indexed for MEDLINE]

Clarification

Who was Andrew Goring Pritchard's father - 'their son' does not make it clear. Jackiespeel (talk) 16:16, 28 August 2014 (UTC)[reply]