The Omega Chapter of the Society of Sigma Xi cordially invites the members of the Biological Club to be present at the final meeting of the Chapter, in the Physical Lecture Room, Saturday June 8th, at 11 o’clock a. m. to hear a lecture by Professor Charles F. Mabery on the subject: “The Petroleum Industry: Its Rapid Expansion and Future Promise.” Dr. Bownocker delivered an instructive paper on “Oil and Gas in Southeastern Ohio.” The first oil well in that region was drilled about 1860 at Maxburg in Washington County. The wells in this region when first put down oftentimes yield 500 barrels or more daily but they soon decrease until the product of the same well may be only a few barrels each day. They are long-lived however and wells drilled in the Sixties are still producing. The oil in Southeastern Ohio has its origin in the various sands and therefore differs from that of Northwestern Ohio where all the oil is of limestone origin. The speaker explained the nature of the country, especially in reference to the arches where practically all the oil is located. H. S. Houghton not being present, Professor Landacre gave a short outline of the subject “A Study of the Muscular and Skeletal Structures in the Head of a 14 mm. Salamander.” A. F. Conradi read a short paper on the subject “A Study of the Cecidomyidae and their effects upon Vegetation.” The motion was made and carried that when we adjourn we adjourn to meet in the Zoological Lecture Room Friday evening, June 7th, at 4 o’clock, for the purpose of considering matters connected with the THE OHIO NATURALIST. JAMES S. HINE, Secretary. * * * * * With this issue THE OHIO NATURALIST completes its first year. The Editors to be chosen for 1901-2 will continue the Journal along the same lines and we trust that those interested in the natural history of Ohio, as well as others, will continue to give their encouragement and financial support. A table of contents and a title-page of Vol. 1 will be sent out with the first number of Vol. 2. JOHN H. SCHAFFNER. 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=.