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SMITHSONIAN INSTITUTION  482
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MADE BY BAKER-VAWTER CO. 
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It is highly probable that this lost race which constructed a large special building for their fire cult must have practiced most elaborate fire ceremonies far more complicated than the rites of their few descendants, the Hopi Indians, among whom, however, the New Fire rites still survive as the most elaborate ceremony in their ritual.

[[underlined]] Astrophysical Observatory [[/underlined]].

[[underlined]]Research Work[[/underlined]]. A new observing station has been established by Dr. C. G. Abbot, Assistant Secretary of the Institution and Director of the Astrophysical Observatory, on Mt. Harqua Hala, in Arizona, for the purpose of carrying on solar constant measurements, the instruments used in the work having been taken from the old station on Mt. Wilson, California.

The instruments were restandardized with the result that the secondary instruments in daily use were shown to have not altered appreciably in the many years during which they have been employed on Mt. Wilson.

A re-determination was made of the losses which occur in the special spectroscope used in the work, and highly satisfactory results were obtained.

A new instrument called the "honeycomb pyranometer" was used for measurements of nocturnal radiation. It derives its name from the fact that it is composed of 200 deep, narrow cells, like a honeycomb, so that rays which enter the cells, although they may not be completely absorbed at first, yet by repeated reflections as they go deeper and deeper within the cells, at length attain to complete absorption and conversion into heat.  These preliminary results give promise of much advance in the measurement of rays such as the earth sends out into space at all times, which as a whole balance in their energy the energy of the sun's rays by which the temperature of the earth's surface is maintained.

Through the interest and generosity of Mr. John A. Roebling, of New Jersey, who gave the Institution $11,000 for this purpose, and through the energy displayed by the several observers concerned, the solar radiation
[[initiated]] CDW [[/initiated]]