Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 29 (1922) > Annual Issue
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
Recommended Citation
Kunerth, WM.
(1922)
"A Comparison of Intensities Required under Direct and under Indirect Lighting Systems,"
Proceedings of the Iowa Academy of Science, 29(1), 141-146.
Available at:
https://scholarworks.uni.edu/pias/vol29/iss1/29