Geology and Natural History. 409 
American Chemical Jour set edited, with the aid of Chem- 
te = home and abroad, by Ira Remsen, Professor of Chemistry 
in the Johns Hopkins ebveniay. Vol. yn O. p- 8vo. 
Baltimore, April, 1879.—The ctubliohian of this beanies 
Chemical Journal is an event of great importance to the science 
not be i tte 
are para ba b dies, ts C. S. Hastings; a New Volumetric 
method of determining Poste ‘by ae Penfield ; on the Oxida- 
ti 
ra 
Remsen and M. W. Iles. The Journal is to be —— — other 
month; the subscription price is ‘tees dollars a yea 
IL GroLtocy AND Naturat History. 
Fossil Forests of the Volcanic Tertiary ~ siggy ve es 
elloumsbets National Park; by jen H. Hot (Bull 
Geol. and Geogr. Survey, Vol. ¥ . 1.)—The rae Tertiary 
deposits (tufas, “ete. ) of the Yelirweona region have a thickness of 
more than 5,000 feet. They contain silicified trunks of trees in 
many places. Mr. Holmes describes particularly a section on the 
north face of Amethyst Mountain, in which upright trunks occur 
at many levels, along with o thers oe from near the foot 
to the highest stratum. On the steeper part “rows of upright 
trunks stand out like the columns of a ruined temple,” and on the 
slopes lower down, the petrified trunks fairly cover the surface. 
Some of the prostrate trunks are fifty to sixty feet long and many 
are five to six feet in diameter. The upright trunks are occasion- 
diameter, and its baie was four inches in thickness. There are 
also leaves and stems, and Lesquereux has identified among them 
Aralia Whitneyi, Magnolia lanceolata, Laurus Canariensis, 
and new species of Tilia, Fraxinus, Diospyros, Cornus, Pteris 
and Alnus. 
2. Fruit-bearing branch dees Cordaites from Cannelton, Penn- 
sylvania.—In the Proceed of - American Philosophical 
eaters It is a bent or pendent es one centimeters 
long and nearly one and a halt broad, having the fruit arranged 
spirally in a loose strobile-like way. e winged nut or fruit is 
