Yazar
Allegheny Observatory
3 cilt bulundu.
Cilt sonuçları
Atmospheric radiation
Frank W. Very, Allegheny Observatory, United States. Weather Bureau · Govt. print. off.
134 sayfa · 1900
Radiation and absorption / Heat / Air
A proposal is herewith submitted to you for regulating, from this Observatory, the clocks of the Pennsylvania Central, and other railroads associated with it
S. P. Langley, Allegheny Observatory · Allegheny Observatory
Sayfa sayısı yok · 1869
Clocks and watches / Railroads
On the cheapest form of light
S. P. Langley, Frank W. Very, Allegheny Observatory · Yayınevi bilinmiyor
17 sayfa · 1890
Kategori yok