REPORT OF COMMITTEE ON OBSERVATORIES 69 



equipped for work. This building might be constructed of wood or 

 possibly of rough fragments of granite. In any event, provision 

 should be made for storing the photographs and other records in a 

 small fire proof room. 



In view of the isolation of the observatory and the important pur- 

 pose of developing new methods and apparatus in connection with 

 its work, provision has been made in the estimates for a very com- 

 plete equipment of the instrument shop. It is understood that this 

 machinery would be purchased and immediately installed in a shop 

 if the Carnegie Institution were to decide to establish the observa- 

 tory. The tools would therefore be used from the outset in the con- 

 struction of a large part of the equipment. 



D. Dwellings for Members of Staff, etc. — Simple cottages and bach- 

 elors' quarters should be provided at the observatory site. 



Other items of expense of a general nature would include a tele- 

 phone line and a line for transmitting electric power to the summit 

 of the mountain, sewer and water systems, etc. 



Stations B and C, for Solar Observations at High Altitudes and Studibs of 



Atmospheric Absorption. 



No recommendation is made at present as to the site of these sta- 

 tions, although it is possible that Mount Whitney and Lone Pine 

 would prove to be suitable. The estimates of expense are based on 

 the assumption that sites similar to these would be selected. 



The plan of work at these stations would include simultaneous 

 observations for the measurement of the solar constant and the de- 

 termination of the atmospheric absorption. The buildings of the 

 two stations should be alike, except for the addition of a few rooms 

 required at the lower station. They contain, in addition to shelter 

 for the instruments, small dwelling rooms for the four men — two at 

 each station — who would occupy them throughout the summer 

 months. The instrumental equipment of the two stations would be 

 similar, consisting of a 16-inch ccelostat and spectro-bolometer for 

 the solar constant work, together with a small miscellaneous equip- 

 ment of instruments required in connection with this investigation. 



General items of expense in connection with stations B and C 

 would include means of communication between the stations, simple 

 devices to maintain the constancy of temperature needed for bolo- 

 metric work, provision for water supply and fuel, improvement of 

 trails, shelter for laborers and pack animals, etc. 



