408 The American GeolqgUt. December, 1*94 
former great extent of the glaciers is thought by Dr. Gregory 
to have been a greater altitude of the country including this 
mountain ; and he thinks that this epeirogenic uplift may have 
extended westward across Africa to the Cameroons mountains 
and to the mouth of the Congo river, which has a submerged 
continuation of its valley to the depth of 6,000 feet beneath 
the sea level. The alpine flora found on the mountains of 
Abyssinia, on Kenya, Kilima Njaro, and the Cameroons, fur- 
nishes additional evidence that during a late geologic epoch 
this extensive continental area was a much higher plateau 
than now, having consequently a cooler and moister climate, 
with a continuous flora similar to that which now survives 
only upon the mountains. 
National Academy of Sciences. The following papers 
were read at the Autumn meeting, Oct. 30, 31 and Nov. 1, 1894, 
at New Haven : An indirect experimental Determination of 
the Energy of Obscure Heat, William A. Rogers ; Determina- 
tion of the Errors of the Circles of an electrotype copy of 
T} 7 cho Brahe's Altitude Azimuth instrument now in possession 
of the Smithsonian Institution, William A. Rogers ; TheWinne- 
bago 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 Re- 
lation of Gravity to Continental Elevation, Thomas C. Men- 
denhall ; The Legal Units of Electrical Measure, Thomas C. 
Mendenhall ; On derived Equations in Optics, Charles S. Hast- 
ings ; On a method of eliminating Secondary Disperson, using 
ordinary silicate Glasses only, Charles S. Hastings ; The 
Chemical Nature of Diastase, Thomas B. Osborne ; Some 
Features in the Development of Brachiopods, Charles E. 
Beecher; On the Presence of Devonian Fossils in Strata of 
Carboniferous Age, Henry S. Williams ; On the influence of 
Insolation upon Culture Media, and of Desiccation upon the 
Vitality of the Bacillus of Typhoid, of the Colon Bacillus, and 
of the Staph}dococcus aureus, John S.Billings; Report on 
Photographing Meteors, William L. Elkin ; Biographical Me- 
moir of F. V. Hayden, Charles A. White; Geographical and 
Bathymetrical Distribution of the Deep Sea Echinoderms, dis- 
covered off the American Coast, north of Cape Hatteras, AE. 
Verrill; On the effect of Pressure in broadening Spectral 
Lines, A. A. Michelson ; Remarks upon the progress of work 
upon a Handbook of the Brachiopoda, James Hall; Note upon 
the Occurrence and Distribution of the Dictyospongid;e in the 
Devonian and Carboniferous Formations, James Hall ; Infra- 
red Spectrum, S. P. Langley; On a certain Theorem in Theo- 
retical Mechanics, J. W. Gibbs. 
