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Filtering by: Creator Trotzky, Arthur Seth Degree Field General Science

A study of the deterioration of X-ray fluoroscopic screens

Creator:

Properzio, William Stuart, 1940-

Abstract:

From the time when fluoroscopic screens were first used there have been scattered references to reduction in their light output due to age, use, etc. References are scarce and usually devoid of quantitative data. A long-range program has been set up in an effort to arrive at some meaningful information....

Resource Type:

Masters Thesis

Full Text:

fluoroscopic screens. An interesting development prior to Levy and West's work was reported by I. Seth
The Development of Astronomy in the United States Prior to 1900

Creator:

Harburg, William A.

Abstract:

From the earliest English colonization to the present day, there has been interest in astronomy in this country. The purpose of this thesis is to show how the science of astronomy developed in America from the earliest observations by educated colonists using imported instruments and publishing in European journals, to...

Resource Type:

Masters Thesis
J.H. Woodger and the emergence of supra-empirical orders of discussion in early twentieth century biology

Creator:

Allen, Marshall William

Abstract:

This investigation attempts to demonstrate that the development of the early 20th century biological enterprise involved a striving for a unifying theoretical perspective. A skeletal substantiation of this is given by an overview of early 20th century biology in which some biologists began recognizing a multiplicity of different orders of...

Resource Type:

Masters Thesis

Full Text:

. Arthur Thomson (1861-1933) in his article "Biology" in the Encyclopedia B ritannica, Biology may be