Scientific Intelligence. 509 



8. Astronomical Observatory of Harvard College, Edward 

 C. Pickering, Director. — Recent publications from the Harvard 

 College Observatory are included in the following list (continued 

 from vol. xxiii, 323) : 



Annals. — Volume XL VII, Part I. A photographic Study of 

 Variable Stars, forming a part of The Henry Draper Memorial ; 

 prepared by Williamina V. Fleming under the direction of 

 Edward C. Pickering. Pp. 113, with 5 tables. Volume LVII, 

 Part I. Observations of Seventy-five Variable Stars of Long 

 Period during the years 1902-1905 ; prepared for publication by 

 Leon Campbell under the direction of Edward C. Pickering. 

 Pp. iv, 210, with 2 plates and 13 tables. Vol. LX, No. IV. 

 1777 Variables in the Magellanic Clouds ; by Henrietta S. 

 Leavitt. Pp. 87-108, with 2 plates and 6 tables. No. V. Ten 

 Variable Stars of the Algol Type ; by Henrietta S. Leavitt. 

 Pp. 109-146, with 3 plates and 15 figures. 



Volume LXII, Part I. Determination of Constants for the 

 Reduction of Zones Observed with the Meridian Circle during the 

 years 1888 1898 ; by Arthur Searle. Pp. 145, with 9 tables. 



Circulars — No. 125. Stellar Magnitudes; by Edward C. 

 Pickering. Pp. 3, with one table. 



No. 126. Two Variables discovered by M. Baillaud ; by 

 Edward C. Pickering. Pp. 3, with two tables. 



No. 127. New Variable Stars in Harvard Map, Nos. 3 and 6 ; 

 by Edward C. Pickering. Pp. 4, with three tables. 



No. 128. Missing Durchmusterung Stars; by Edward C. 

 Pickering. Pj>. 4, with one table. 



No. 129. 15 New Variable Stars in Harvard Maps Nos. 31 and 

 62 ; by Edward C. Pickering. Pp. 4, with two tables. 



No. 130. 71 New Variable Stars in Harvard Maps, Nos. 9, 12, 

 21, 48, and 51; by Edward C. Pickering. Pp. 4, with two 

 tables. 



9. New York State Museum, Albany, JV. Y. JohnM. Clarke, 

 Director. — The following publications have recently been issued : 



Third Report of the Director of the Science Division, 1906, 

 including the 60th Report of the State Museum, the 26th Report 

 of the State Geologist, and the Report of the State Paleontol- 

 ogist for 1906. Pp. 182. 



Bulletin 111, Geology 13. Drumlins of Central Western New 

 York ; by H. L. Fairchild. Pp. 391-443. 



Bulletin 112, Economic Geology 16. The Mining and Quarry 

 Industry of New York State : Report of Operations and Produc- 

 tion during 1906 ; by D. H. Newland. Pp. 80. 



10. Dew -ponds ; by Edward A. Martin, F.G.S. Reprinted 

 from "Knowledge and Scientific News," Maryland, June 1907. — 

 These ponds are shallow artificial hollows, without inlet or outlet, 

 made on the English downs. The writer discusses their construc- 

 tion and the theories accounting for their filling. He regards it 

 as certain that mists contribute largely to these ponds, and points 

 out that if dews contribute also it may be necessary to revise 

 somewhat the theory that dew is really formed from moisture 

 which rises out of the soil Bather than from moisture condensed 

 from the air. j. b. 



