Present Names. Proposed Names. Upper Barren Coal Measures Dunkard formation Upper Productive Coal Measures Monongahela formation Lower Barren Coal Measures Conemaugh formation Lower Productive Coal Measures Allegheny formation The Philadelphia Fleabane (Erigeron philadelphicus L.) is one of our interesting spring plants and will repay careful study. The leaves of the stem in most individuals have a decided polarity and for the most part are twisted so as to stand in a single plane. In this respect the plant is as striking as any of the so-called compass plants, although the plane in which the leaves lie may be in any direction. Another interesting adaptation is the drooping of the top of the young plant. The entire inflorescence nods at first and finally the individual heads, but one by one these assume the upright position as the flowers begin to open. J. H. S. WINTER ADAPTATION OF OPUNTIA.—The Ohio species of cactus, Opuntia humifusa Raf., has an interesting habit which seems to be a protective measure against cold. At the approach of Winter the flattened stems lose their upright position and press themselves closely to the surface of the ground. The stems lose considerable of their moisture at the same time, becoming wrinkled but not at all flaccid. By the end of April they are again upright and distended. F. J. T. ------------------------------------------------------------------------ Ohio State University Six distinct and independent Colleges, each with a Dean and Faculty of its own. THIRTY SEVEN DEPARTMENTS. THIRTY DISTINCT COURSES. AGRICULTURE, ARTS, LAW, ENGINEERING, PHARMACY, VETERINARY MEDICINE. Superior facilities for education in Applied Science. Short or special courses for mature students not candidates for degrees. One hundred and twenty one instructors. Over thirteen hundred students. FINEST GYMNASIUM IN THE WEST. _For further information address the President_, DR. W. O. THOMPSON, STATE UNIVERSITY, COLUMBUS. Ohio Forest Trees Identified by Leaves and Fruit. By W. A. KELLERMAN, PH. D., Ohio State University. A neat pamphlet for every one who wishes to learn our native forest trees. Keys simple. Description plain. Can learn the names of the trees easily. Price reduced from 25 cents to =10 cents=. Also, =The Fourth State Catalogue of Ohio Plants=. Bound copies at cost of binding, namely =20 cents=. Gives list of scientific and common names; distribution by counties.