398 



SCIENCE 



[N. S. Vol. XLIV. No. 1133 



In August, 1913, 1 I described such a device 

 in which the fan was moved by clock-work. 

 This I used with satisfaction for a year, but 

 replaced it (see figs.) by an apparatus in 

 which the fan was driven by a toy motor. The 

 latter is practically noiseless and has been 

 used in experimental work for two years. 



Eugene C. Howe 



Depaktment of Hygiene, 

 Welleslet College 



SOCIETIES AND ACADEMIES 



THE ASTRONOMICAL SOCIETY OF THE 

 PACIFIC 



A meeting of the Astronomical Society of 

 the Pacific was held at San Diego on Thurs- 

 day and Friday, August 10 and 11, in conjunc- 

 tion with the first meeting of the Pacific Di- 

 vision of the American Association for the 

 Advancement of Science. In the absence of 

 the president and vice-presidents of the so- 

 ciety, the meeting was opened by Dr. R. G. 

 Aitken, chairman of the program committee. 

 Dr. W. S. Adams, of the Mount "Wilson Solar 

 Observatory; Dr. W. W. Campbell, of the Lick 

 Observatory, and Professor Charles Burck- 

 halter, of the Cabot Observatory, presided at 

 the three sessions held. 



The papers at the first session related en- 

 tirely to the nebulas, those at the second ses- 

 sion principally to spectrographic investiga- 

 tions. All of the papers were fully discussed. 

 Abstracts of the papers are given in the Au- 

 gust-October number of the Publications of 

 the Astronomical Society of the Pacific, hence 

 only the titles are printed here. 



"Spectrographic Observations of Eelative Mo- 

 tions within the Planetary Nebulae." (Illustrated 

 with stereopticon.) By W. W. Campbell and J. H. 

 Moore, Lick Observatory. 



' ' The Eotation and Radial Velocity of the Spiral 

 Nebula, N. 6. C. 4594." (Illustrated with stere- 

 opticon.) By Francis G. Pease, Mount Wilson 

 Solar Observatory. 



"Forms of Planetary Nebulae. " (Illustrated 

 with stereopticon.) By H. D. Curtis, Lick Ob- 

 servatory. 



"Color-photographs of Nebulas." (Illustrated 

 with stereopticon.) "A Simple Method for De- 



i-Amer. Jour, of Pub. Health, III., 8, August, 

 1913. 



termining the Color of a Star," by Frederick H. 

 Seares, Mount Wilson Solar Observatory. 



"Spectrographic Observations of Nebula? and 

 Star Clusters," by V. M. Slipher, Lowell Observ- 

 atory. 



"On the Motion of Nebulous Filaments in N. 

 G. C. 6992; Variable Stars in the Lagoon Nebula, 

 N. G. C. 6523," by C. O. Lampland, Lowell Observ- 

 atory. 



"Notes on Stellar Clusters," by Harlow Shap- 

 ley, Mount Wilson Solar Observatory. 



"A Relation between the Convergence Wave- 

 lengths in Spectral Series and the Badii of their 

 Kespeetive Atoms as Computed from Einstein's 

 Photo-electric Equation and by other Methods," 

 by Fernando Sanford, Stanford University. 



"Kecent Stellar Spectroscopic Results." (Il- 

 lustrated with stereopticon.) By Walter S. Adams, 

 Mount Wilson Solar Observatory. 



"The Measurement of Close Pairs of Solar 

 Lines," by Charles E. St. John and L. W. Ware, 

 Mount Wilson Solar Observatory. 



' ' The Suggested Mutual Influence of Fraun- 

 hofer Lines," by Charles E. St. John, Mount Wil- 

 son Solar Observatory. 



"Observations with High Dispersion of the 

 Line 6708 in Laboratory and Sun-spot Spectra." 

 (Illustrated with stereopticon.) By Arthur S. 

 King, Mount Wilson Solar Observatory. 



"Recent Observations of the Diurnal Change of 

 Refraction at Lick Observatory, " by R. H. Tucker, 

 Lick Observatory. 



"Preliminary Note on the Determination of the 

 Longitude of the Students' Observatory by Wire- 

 less Signals from Arlington," by R. T. Crawford, 

 University of California. 



"John Winthrop (1714-1779), America's First 

 Astronomer, and the Science of His Period, ' ' by 

 Frederick E. Brasch, Stanford University. 



"The Chabot Observatory," by Charles Burck- 

 halter, Chabot Observatory. 



"Notes on Certain Double Star Orbits." (Illus- 

 trated with stereopticon.) "Note on Barnard's 

 Proper Motion Star," by R. G. Aitken, Lick Ob- 

 servatory. 



' ' Note on Aethra, ' ' by Dinsmore Alter, Univer- 

 sity of California. 



"Comet b 1916 (Wolf)." (Illustrated with 

 stereopticon.) By R. T. Crawford and Dinsmore 

 Alter, University of California. 



"A Luminous Object Seen on May 4, 1916," by 

 C. D. Perrine, Argentine National Observatory. 



' ' A Luminous Object Suspected to be a Comet, ' ' 

 by A. Estelle Glancy, Argentine National Observ- 

 atory. 



