ASTRONOMY — RUSSEIX.SCHLESINGER — BIBLIOGRAPHY — EAMES.FLETCHKR. I75 



Seventeen series of plates have been completely discussed and least-square 

 solutions made for the parallax of 23 stars shown thereon. The results for 

 II of these stars have been published in the Monthly Notices of the Royal 

 Astronomical Society for June, 1905, and December, 1906. Besides these, 

 the approximate parallaxes of the 140 comparison stars employed have been 

 determined, the results showing that these are in general less than the errors 

 of determination (which are themselves satisfactorily small). 



The completion of the 14 series now in progress will raise the number of 

 "parallax stars" to 44 and of comparison stars to about 240. To this total 

 may be added 8 stars observed at two epochs with the color-screen, for which 

 approximate determinations can be made. 



Dr. Russell hopes that the results for all the above may be presented to the 

 Institution before the close of the coming academic year, thus completing his 

 work. 



Schlesinger, Frank, Allegheny, Pennsylvania. Grant No. 422. Completion 

 of parallax computations begun under direction of Dr- G. B. Hale. $300. 



The calculations for the parallaxes of all of the 24 stars under consideration 

 have been completed. It remains to make the computations for the general 

 discussion of these results and to prepare them for publication. This work 

 will probably proceed somewhat slowly on account of the small amount of 

 time that Dr. Schlesinger is enabled to spare for this work from other and 

 more pressing duties. 



BIBLIOGRAPHY. 



Eames, Wilberforce, Lenox Library, New York, New York. Grant No. 

 343. Completion of Sahin's "Dictionary of Books Relating to America," 

 from "Smith to Z." (For previous report see Year Book No. 5, p. 90.) 



$3,600. 



The work of completing the manuscript copy for the remaining part of the 

 alphabet (S to Z) of Sabin's Dictionary of Books Relating to America has 

 progressed steadily since January i, 1907, having been carried on, under Mr. 

 Eames's supervision, by Mr. Frederick C. Bursch. The printing will prob- 

 ably be deferred until the completion of the manuscript, probably next June. 



Fletcher, Robert, Army Medical Museum, Washington, District of Columbia. 

 Grant No. 410. Preparation and publication of the Index Medicus. 

 (For previous reports see Year Book No. 2, p. 23; Year Book No. 3, 

 p. 95 ; Year Book No. 4, p- 85, and Year Book No. 5, p. 91.) $12,500. 

 The volume of the Index Medicus for 1906 illustrates still further than at 

 last report the remarkable growth of periodical medical literature through- 

 out the world. The first volume of the first series of the Index Medicus, 



12 — YB 



