76 REPORTS OX INVESTIGATIONS AND PROJECTS. 



PUBLICATIONS. 



The publications of the Solar Observatory will include : (i) Con- 

 tributions from the Solar Observatory, consisting of octavo papers 

 printed also in the Astrophysical Journal (Nos. i and 2 have been 

 distributed) ; (2) quarto volumes, forming part of the regular series 

 of publications of the Carnegie Institution ; (3) annual report of the 

 director, from the Year Book of the Carnegie Institution, and (4) a 

 series of reproductions of photographs, issued separately from time 

 to time. 



PASADENA OFFICE AND SHOP. 



The Solar Observatory has no department more important than its 

 instrument and optical shop in Pasadena, of which Mr. Ritchey is 

 superintendent. When instruments of special design are needed in 

 astrophysical research they are best constructed under the immediate 

 observation of those whose ideas they embody. This fact, together 

 with the saving of time and the facility of improvement or repair also 

 afforded, has made a well-equipped instrument shop an essential part 

 of a modern astrophysical observatory. Since the successful per- 

 formance of the instruments constructed depends in large measure 

 on the qualit)' of the machine tools with which they are made, I have 

 thought it wise to equip the shop with the best tools obtainable. 

 These are enumerated in Contribution No. 2. 



The shop, when first established in connection with the expedition 

 for solar research (September, 1904), occupied rented quarters in 

 Pasadena. The danger from fire and the necessity of having more 

 space and special arrangements for optical work led to the construc- 

 tion of a substantial brick building in the spring of 1905. I wish to 

 express our great obligations to the Board of Trade of Pasadena, 

 which secured through public subscription funds sufficient to pay for 

 two of the three adjoining lots (each 50 feet wide and 208 feet deep) 

 occupied by the shop. I wish also to thank each of the contributors 

 to the fund raised by the Board of Trade. The hearty interest shown 

 by the citizens of Pasadena and Los Angeles in the Solar Observatory 

 has helped us very materially. We hope that the observatory may 

 ultimately prove of considerable public benefit. The space still avail- 

 able on the shop site (Santa Barbara street, near L,ake avenue) will 

 give ample room for the temporary erection of the 5-foot reflector 

 mounting, the construction of a small building for the staff of com- 

 puters, etc. 



The new shop building, which is briefly described in Contribution 

 No. 2, was first occupied in May, 1905. The machine and pattern 



