1894.] Proceedings of Scientific Societies. 1069 
super-families. |. S. F. Clark, “The breeding habits of Alligator." H. 
F. Osborn, * The skull structure of Titanotheres." 
Basprorp DEAN, Ree. Sec. 
National Academy of Sciences.—The following papers were 
read at the meeting in New Haven, Oct. 30., Nov. 1.—4An indirect ex- 
perimental Determination of the Energy of Obscure Heat, William 
A. Rogers; Determination of the Errors of the Circles of an electro- 
type copy of Tycho Brahe's Altitude Azimuth Instrument now in pos- 
session of the Smithsonian Institution, William A. Rogers; The Win- 
nebago County, Iowa, Meteorites and the Meteor, Hubert A. Newton ; 
Literal Expression for the Motion of the Moon's Perigee, George W. 
Hill; Atmospheric Dust and Aqueous Precipitation in Arctic Regions, 
William H. Brewer; Further Researches on the Polar Motion, Seth 
C. Chandler; The Relation of Gravity to Continental Elevation, 
Thomas C. Mendenhall; The Legal Units of Electrical Measure, 
Thomas C. Mendenhall; On derived Equations in Optics, Charles S. 
Hastings; On a method of eliminating Secondary Dispersion, using 
ordinary silicate Glasses only, Charles S. Hastings; The Chemical 
Nature of Diastase, Thomas B. Osborne, (Introduced by S. W. John- 
son); Some Features in the Development of Brachiopods, Charles E. 
Beecher, (Introduced by O. €. Marsh); On the Presence of Devonian 
Fossils in Strata of Carboniferous Age, Henry S. Williams, (Intro- 
duced by O. C. Marsh); On the influence of Insolation upon Culture 
Media, and of Desiccation upon the Vitality of the Bacillus of Ty- 
phoid, of the Colon Bacillus, and of the Staphylococcus aureus, John 
S. Billings; Report on Photographing Meteors, William L. Elkin, 
(Introduced by H. A. Newton); Biographical Memoir of F. V. Hay- 
den, Charles A. White; Geographical and Bathymetrical Distribution 
of the Deep Sea Echinoderms, discovered off the American Coast, 
north of Cape Hatteras, A. E. Verrill; On the effect of Pressure in 
broadening Spectral Lines, A. A. Michelson; Remarks upon the pro- 
gress of work upon a Handbook of the Brachiopoda, James Hall ; 
Note upon the Occurrence and Distribution of the Dictyospongids in 
the Devonian and Carboniferous Formations, James Hall; Infra red 
Spectrum, S. P. Langley; On a certain Theorem in Theoretical 
Mechanies, J. W. Gibbs. 
The Biological Society of Washington, December 1st.—The 
following communications were read: Mr. B. T. Galloway, “The 
Physiological Significance of the Transpiration of Plants" Mr. F. 
