University of Maryland
Optics Highlights: The Telescope
Part of an anecdotal history of optics and the study of light. Extremely thorough treatment of the invention of the telescope. Includes a short biographical sketch and discusses the work of Isaac Newton which focuses on his contribution...
Careers New Zealand
Kiwicareer: Usher
This site contains detailed information about the usher career field. While this site is based out of New Zealand and contain information for that country, there is valuable data that is useful about this career.