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Document Type

Research

Abstract

Although artificial indirect lighting dates back twenty-five years or more, it was not very extensively patronized until after 1906 when the advent of the more efficient Mazda B lamp made its commercial use possible. At once comparisons were made between the direct and the indirect systems on various points.

Publication Date

1922

Journal Title

Proceedings of the Iowa Academy of Science

Volume

29

Issue

1

First Page

141

Last Page

146

Copyright

©1922 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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