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AND METEOROLOGY. 
BY EL WOOD MEAD, B. S., C. E., 
Professor of Physics and Engineering. 
INTRODUCTORY. 
The object of this bulletin is to give an account of the experi¬ 
mental work for the present year of the department of Physics 
and Engineering, with tlio results obtained up to August 1. This 
work embraces meteorological observations, and experiments and 
investigations in subjects connected with irrigation. An increased 
knowledge of both subjects possesses for this state an exceptional 
interest and importance. The rapidity of the development of our 
irrigation interests by a people ignorant of the practice is without 
a counterpart, and has opened up many problems whose solution 
i5 urgently required, but which will require years of painstaking 
investigation. The study of our climate has both a commercial 
and scientific value. Greater attention is everywhere being jiaid 
to meteorological observations in connection with agricultural 
experiment work, but in this state the following facts lend addi¬ 
tional importance to the work: We have a light rainfall and 
atmosphere of unusual dryness, solar and terrestrial radiation are 
very active, resulting in a considerable difference in temperature 
between day and night, while the number of hours of sunshine are 
nearly double that of some jm-ts of the United States. The part 
