Annals of the Astrophysical Observatory of the Smithsonian Institution (1900)
Washington : Government printing office · leaf 152
102 ANNALS OF ASTKOPHYSICAL OBSERVATORY. Experiments on the Thermal Conductivity of Rock Salt. To obtain a rough idea of the thermal conductivity of salt and how far the Allegheny observations just cited might be in error from imperfect temperature determinations the following experiment was tried: … The temperature prism, which is a 60° prism 18 cm. on each edge and 16 cm. high, was car¬ ried from a warm room to the cold basement and readings made at intervals until its temperature
Infrared spectra · Solar radiation
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