NOTE.—Special articles are—
Atmospheric transparency, Variations in, during 1902-04; by H. H. Kimball.
Diurnal periods in lower strata of atmosphere, studies on, 2. diurnal periods of barometric pressure; by F. H. Bigelow.
Earthquake of Mar. 21, 1905; by C. F. Marvin.
Eclipse, Solar, of Aug. 30, 1905, as visible in United States; by W. F. Rigge.
Meteorology, Application of mathematics in; by F. H. Bigelow.
Meteorology, Recent papers bearing on; by H. H. Kimball.
Snowfall and water equivalent; by H. C. Frankenfield.
Tornado in eastern Alabama, Mar. 20, 1905; by F. P. Chaffee.
Twilight glows and connected phenomena observed in 1902-04 in Pyrenees; by E. Man-hand, translated by R. A. Edwards.
Weather Bureau library. Recent additions to; by H. H. Kimball.