546 
Cone Eruptions.’ The discussion is devoted 
principally to the formation of the cone Leahi, 
or Diamond Head, in Honolulu, which the 
author claims, and attempts to prove, was 
formed by an extremely rapid projection aloft 
of its material for a few hours, ceasing sud- 
denly and finally. The article is accompanied 
by a plate. ‘ Possible new Coal-Plants, etc., in 
Coal,’ Part III., by W. 8. Grisley, Erie, Pa. 
The writer describes and figures about fifty 
fossils which he thinks may be coal plants- 
hitherto undescribed. Most of the forms de- 
scribed come from a coal bed in Iowa. Mr. 
John Dresser discussed the ‘ Petography of 
Mount Oxford,’a large igneous mass in the 
Green Mountains of Vermont. The main 
part of the mountain consists of graywacke, 
serpentine, ophicalcite and sandstone. A paper 
follows ‘On Some Newly Discovered Areas 
of Nepheline Syenite in Central Canada,’ by 
Willet G. Miller. In a very interesting paper 
on ‘Peneplains of the Ozark Highlands, ’ 
Oscar H. Hershey discusses the life histories 
of certain parts of the Ozark region. The 
changes may be briefly put as follows: (1) The 
entire region was reduced to base level form- 
ing cretaceous peneplain. (2) A great dome- 
shaped uplift occurred in the southern two- 
thirds of the region, and it was base-leveled 
again during the Tertiary. (3) A general up- 
lift throughout the Ozarks, which was again 
eroded and base-leveled in some places during 
the Pliocene. (4) Another general uplift, great- 
est in southern Missouri. (5) A local uplift of 
the Boston Mountains during the modern epoch. 
Following are the ‘ Reviewsof Recent Geological 
Literature’ and ‘ Personal and Scientific News.’ 
In Popular Astronomy for April Herbert A. 
Howe continues his discussion of astronomical 
books for the use of students, taking up general 
popular works, descriptive text-books and hand- 
books. Professor Harold Jacoby, of the Astro- 
nomical Observatory of Columbia University, 
writes under the title of ‘The Astronomer’s 
Pole,’ of the work to be done at the new Hels- 
ingfors Observatory. Illustrations of the instru- 
ments and building accompany the article. 
Anderson’s ‘ New Star in Perseus’ is the sub- 
ject of several articles, and notes. Circular 
No. 56, from the Harvard Observatory, by E. 
SCIENCE. 
[N.S. Vou. XIII. No. 327. 
C. Pickering, with reference to the Nova is 
printed in full; the first chart and catalogue for 
observing it is given by J. G. Hagen, S.J., of the 
Georgetown College Observatory, Washington, 
and Dr. H. C. Wilson, of Goodsell Observatory, 
adds much to the general information of the 
Nova, and includes a chart of its light curve. 
Shorter articles are by R. W. McFarland, on 
‘Ancient Eclipses and Chronology’; by Dr. 
George Bruce Halsted on ‘ Astral Geometry,’ 
and by A. E. Douglass, on ‘ Photographs of the 
Zodiacal Light ’; the latter is accompanied by an 
excellent plate. Eclipse cyclones are discussed, - 
and thereisatranslation of H. Arctowski’s article 
on ‘ Northern and Southern Lights illuminating 
the Heavens at the Same Time,’ which recently 
appeared in Ciel et Terre. Planet, spectroscopic, 
comet and asteroid notes occupy the usual 
space. Among the ‘General Notes’ are the 
following: Board of Visitors at the Naval Ob- 
servatory, Trouble at the Naval Observatory, 
Naval Observatory Legislation, Observations of 
Nova Persei at Seagrave Observatory, At Yerkes 
Observatory, At Ladd Observatory, At Vassar 
College Observatory, At Pomona College, Nota- 
tion of New Variables, Nomenclature of Vari- 
able Stars, Crocker Eclipse Expedition to Suma- 
tra, Spectrum of ¢ Puppis, Evanescent Star Pho- 
tographs. 
In Italy has just appeared a new mathemat- 
ical journal, issued at Citta di Castello, by the 
publisher, S. Lapi, to whom the annual sub- 
scription, 12 francs, should be sent. It is a 
monthly magazine, called Le Matematiche, un- 
der the direction of Professor C. Alasia, with a 
board of collaborators, among whom the Eng- 
lish language is represented by G. B. Halsted, 
of Austin, Texas, to whom communications 
may be sent, which will appear in Italian. On 
the editorial board may also be noted the Rus- 
sian, Vasiliev, and the greatest of living mathe- 
maticians, Poincaré. The first number, Febru- 
ary, 1901, contains the last thing written for 
publication by the illustrious Hermite, dated 
January, 1901, on the 14th of which month he 
died. The magazine has a suggestive new de- 
partment, headed ‘Subjects for Research.’ 
WE have received with pleasure the first 
number of School Science, a monthly journal 
