332 Miscellaneous Intelligence. 



J. D. "Warner : Method of finding Factors. 



G. C. Comstock : Use of a floating mirror as au auxiliary to a meridian circle. 



J. R. Eastman: Relation Between Stellar Magnitudes. Distances, and Motions. 



Wm. A. Rogers: On the Proper Motions of the Stars in the Harvard College 

 Observatory Zone, between the limits 50° and 55° Declination ; Graduation of 

 Meridian circles in situ. 



J. E. Hendrick: Formula for the Probability of any fact or occurrence about 

 which any number of witnesses testify. 



W. Harkness : The Solar parallax and its related constants. 



S. W. Burnhaai: Double Star discoveries and measures at the Lick Observa- 

 tory. 



H. Farquhar: A proposed Catalogue of Declinations. 



F. H. Bigelow: The Solar Corona, a phenomenon in Spherical harmouios; 

 Automatic photographic Transits. 



D. P. Todd: The Automatic Echpsograph. 



E. Frisby : Errors in Star Catalogues. 



E. D. Preston: The Peruvian Arc. 



J. A. Brashear : New arrangement for an astigmatic Eye-piece ; The Hast- 

 ings Achromatic Objective ; The Jena optical glass. 



J. B. "Webb : A Precession model ; The Polar Tractrix ; The Centrifugal 

 Catenary. 



F. P. Leayesworth: Annual parallax of South 503. 



Section of Physics. 



Rouyn Hitchcock: Exhibition of a new Spectroscope Slit; Exhibition of a 

 Thermometer with constant Zero Point. 



W. LeConte Stevens : The Measurement of magnification in the Microscope. 



Wm. A. Rogers and R. S. Woodward: Concerning Thermometers. 



Wm. A. Rogers: Experimental proof of Newtons law of cooling; Additional 

 experimental proof of the constancy of the relative coefficient of expansion 

 between Jessop's Steel and Bronze between the limits of minus 5° and 95° F. 



H. T. Eddy : On the Partition of the mean Kinetic Energy of a perfect gas be- 

 tween the rotary and translatory motions of its molecules ; Note on the Magnetic 

 Rotation of Polarized Light according to the Electro-magnetic Theory. 



H. C. Bolton : Sonorous sand in the Peninsula of Sinai. 



T. Gray: Relative Merits of Dynamometric and Magnetic methods of obtain- 

 ing absolute measurements of Electric currents. 



H. J. Ryan: A Quadrant Electrometer. 



H. S. Carhart : Magnetic leakage in Dynamos ; An Improved Standard 

 Clark cell with low temperature-coefficient. 



T. C. Mendenhall: On Globular Lightning. 



E. L. Nichols and B. W. Snow: A Preliminary Report on the influence of 

 temperature upon the Color of pigments. 



M. A. Veeder: The Solar condition upon which the Aurora depends. 



C. Abbe: The Determination of the amount of rainfall. 



C. Barus: The Hydro-electric effect of stretching metals. 



G. F. Barker: Recent progress in Storage Batteries. 



R. B. Fulton: A mode of suspension for Foucault's Pendulum. 



A. L. Arey: A modification of the " Pascal's Vase" Experiment. 



C. E. Monroe: Experiments for demonstrating that the force of a detonating 

 explosion is exerted in all directions about the explosive center. 



T. French, Jr. : Effects of Electrostatic discharges on Photographic plates. 



C. S. Cook: A mountain study of the spectrum of Aqueous Vapor. 



Wm. A. Rogers and J. B. Webb: Experimental determination of the periodic 

 pulsations of a Thermometer made of the new " Jena " glass. 



A. M. Rosebrugh: An exhibition of Photographs taken in 1864 of the Living 

 Eye ; An exhibition of Photographs of the Fundus of the Eye of the Cat, taken 

 while under the influence of Chloroform ; Experiments in Duplex Telephony in 

 1883. 



