218 
“Report on recent progress in the theory of 
linear groups,’ L. E. Dickson, University of 
California, Berkeley, Cal. 
“Recent advances in the application of mathe- 
matics to physical problems,’ A. 8. Hathaway, 
Rose Polytechnic Institute, Terre Haute, Ind. 
‘Recent progress in theoretical meteorology,’ 
Cleveland Abbe, Weather Bureau, Washing- 
ton, D. C. 
‘Recent progress in positional astronomy,’ J. 
R. Eastman, Andover, N. H. 
‘Practical astronomy during the first half of 
the present century,’ T. H. Safford, Williams- 
town, Mass. 
‘Internal forces that generate stellar atmo- 
spheres,’ J. Woodbridge Davis, New York City. 
“The determination of the nature of elec- 
tricity and magnetism, including a determina- 
tion of the density of the ether,’ R. A. Fessen- 
den, Western University, Allegheny, Pa. 
“Ancient eclipses and chronology,’ R. W. 
McFarland, Oxford, Ohio. 
‘Some points in the design of a spectroscope,’ 
H. C. Lord, Ohio State University, Columbus. 
‘The relation between point and vector 
analysis,’ J. V. Collins, Stevens Point, Wis. 
‘William Hamilton, Hermann Grassmann und 
deren Widersacher,’ Ferdinand Kraft, Zurich. 
‘The theory of mathematical inference,’ G. 
J. Stokes, Queen’s College, Cork, Ireland. 
“The magnetic work of the Coast and 
Geodetic Survey,’ L. A. Bauer, Coast and 
Geodetic Survey, Washington, D. C. 
SECTION G, BOTANY. 
Vice-Presidential Address, Charles R. Barnes. 
‘Division of the megaspore of Erythronium,’ 
John H. Schaffner. 
‘The embryo-sac of Leucocrinum montanum,’ 
Francis Ramaley. 
‘The occurrence of Lignum and Calcium 
Oxalate during differentiation of the buds of 
Prunus americana,’ H. C. Bolley. 
‘The flora of Franklin Couuty, Ohio,’ A. D. 
Selby. : 
‘Studies of the vegetation of the high plains 
of western Nebraska,’ C. E. Bessey. 
‘The geotropism of the Hypocotyl of Cucur- 
bita,’ Edwin Bingham Copeland. 
SCIENCE, 
[N. S. Vou. X. No. 242. 
‘Notos on the long-leaved (Longifoliz) Wil- 
lows,’ W. W. Rowlee. 
Sullivant Day—Papers on bryological sub- 
jects, especially relating to the work of Sulli- 
vant and the progress in bryology since his 
time. Exhibition of his type specimens, collec- 
tions, publications, portraits and other memen- 
tos. 
‘On the occurrence of the black rot of cab- 
bage in Europe,’ H. A. Harding. 
‘Duration of bacterial existence under trial 
environments,’ H. C. Bolley. 
‘Cultures of Uredinez in 1899,’ J. C. Arthur. 
‘Field experiments with ‘ Nitragin ’ and other 
germ fertilizers,’ Byron D. Halsted. 
‘Some notes on subterranean organs,’ A. S. 
Hitchcock. 
‘The Tamarack Swamps in Ohio,’ A. D. Selby. 
‘Some monstrosities in spikelets of Eragrostis 
and Setaria with their meaning, W. J. Beal.’ 
‘Botanical Teaching in the Secondary Schools,’ 
W. C. Stevens, Ida Clendenin. 
‘Suggestions looking toward a more rational 
basis for the classification of the Pleurocarpous 
Mosses,’ A. J. Grout. 
‘Basis for generic and specific characters in 
the Uredinee,’ J. C. Arthur. 
‘Two diseases of Juniperus caused by 
Trametes pini and Polyporus carneus,’ Her- 
man Von Schrenk. 
‘The effect of hydrocyanic acid gas upon the 
germination of seeds,’ C. O. Townsend. 
‘ Physiological effect of hydrocyanic acid gas 
upon young fruit trees,’ W. G. Johnson. 
‘Are the trees advancing or retreating upon 
the Nebraska plains ?’ C. E. Bessey. 
‘Etiolative Reactions,’ Wm. B. Stuart. 
‘The Mycorhiza of Tipularia,’ Julia B. Clif- 
ford. 
‘Cytological studies in the Hepatic,’ Brad_ 
ley M. Davis. 
‘A thousand miles for a fern,’ C. E. Bessey. 
‘The distribution of lichensin the Mississippi 
Valley,’ B. E. Fink. 
DISCUSSION AND CORRESPONDENCE. 
THE FOEHN WINDS OF SWITZERLAND. 
Mr. WARD’s review, in SCIENCE of July 21st, 
of Billwiller’s classification of the Foehn winds 
