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|Material Type:||Government publication, National government publication|
|All Authors / Contributors:||
S P Langley; Frank W Very
From studies at the Allegheny observatory.
"Reprinted, with additional note, from the American journal of science, third series, vol. XL, no. 236, August, 1890."
|Description:||20 pages III plates (including diagrams) 24 cm.|
|Series Title:||Smithsonian miscellaneous collections, v. 41, no. 4|
|Other Titles:||Light, On the cheapest form of.|
|Responsibility:||By S.P. Langley and F.W. Very.|