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102
CALIFORNIA INSTITUTE OF TECHNOLOGY
personnel of its Advisory Committee are shown on page 46 of
this Catalogue.
The Observatory Council, supported by the unanimous opinion
of the Advisory Committee and of others consulted, decided to
use fused silica for the 200-inch mirror and other mirrors of the
large telescope. President Gerard Swope and Dr. Elihu Thomson
of the General Electric Company promised the full cooperation
of that company in this undertaking; and much progress has
already been made in the preliminary work.
The extensive investigation of primary and auxiliary instruments,
which forms such a vital part of the general scheme, has
also made marked progress, through the active cooperation of
the Warner & Swasey Company, Dr. Frank E. Ross, the Bausch
& Lomb Optical Company, Sir Herbert Jackson, Sir Charles
Parsons, the Philips Lamp Works, Professor Joel Stebbins, and
others. The Research Laboratory of the Eastman Kodak Company
has generously agreed to deal with many of the special
photographic problems. A Zeiss recording microphotometer has
been ordered, and will be used in a comparative study of various
forms of this instrument. The radiometer recently used very successfully
by Dr. C. G. Abbot, of the Smithsonian Institution, in
measuring the distribution of energy in the spectra of stars of
several types has been developed and improved. A comparative
study of possible sites for the 200-inch telescope has been undertaken
by Dr. Anderson, aided by a dozen trained observers.
It is expected that, as soon as the Astrophysical Laboratory on
tbe campus has been built and equipped, the Institute will offer
to competent students the opportunity of pursuing advanced
courses of study and research in astrophysics, leading to the
degrees of Master of Science and Doctor of Philosophy. Undergraduate
students who desire to prepare themselves for such
graduate work should take the Physics Option of the Course in
Science, in which electives in astronomy will be offered in the
senior year.