194 CARNEGIE INSTITUTION OF WASHINGTON. 



cylinder in water after a partial vacuum had been established, thus 

 drawing water through all points of leakage. These points were 

 marked and in sealing especial care was given them, though every 

 joint was carefully gone over with several coats of cement. Three 

 cements received trial, but in each case a gradual leakage took place. 

 The attempt at sealing was consequently given up and it was deemed 

 necessary to secure another clock, which has the additional advantage 

 of assuring the continuity of observation in case one clock breaks 

 down. 



Steps have been taken toward obtaining a temperature control 

 for the clock-room, in order to secure as nearly as possible a constant 

 temperature. 



Upon the termination of the photometric expedition to San Luis, 

 the buildings were turned over to the Argentine government. 



STAFF. 



Mr. A. J. Roy has continued as observer in charge of the meridian 

 circle and has also had charge of part of the work of reduction of 

 observations. He is also responsible for the preparation of the 

 observations of the zone catalogue of 1896-1900 for the printer. 



Mr. W. B. Varnum, besides his duties as observer, has had charge 

 of the reductions of the San Luis right ascensions. 



Mr. H. Raymond has been employed as observer and microscope 

 reader. He has aided the acting director in his investigations and 

 has been otherwise employed upon important parts of the work. 



Mr. Heroy Jenkins returned to Albany from San Luis in March 

 1913. At San Luis he was engaged in the observation and reduction 

 of the photometric work. Upon his return to Albany he resumed his 

 duties as microscope reader. 



Mr. S. B. Grant has continued as microscope reader, being vari- 

 ously employed upon the computations. 



Mr. Meade L. Zimmer, who w^as in charge of the photometric 

 expedition to San Luis, resigned from the department at the expira- 

 tion of the work in March, to accept the position of chief assistant 

 at the Cordoba National Observatory. 



Dr. Sebastian Albrecht, who has been junior professor of astronomy 

 in Detroit Observatory, has accepted the position of astronomer, 

 commencing his duties October 1, 1913. 



In addition, there are 9 computers and a varying number of piece- 

 work computers. 



