Volume XVI. 1915 Number 2.

The Ohio

Journal of Science

(Continuation of The Ohio Naturalist)

Official Organ of the

OHIO STATE UNIVERSITY SCIENTIFIC SOCIETY

and of the

OHIO ACADEMY OF SCIENCE

COLUMBUS, OHIO

Annual Subscription Price, $2.00 Single Number, 30 Cents

Entered at the Post-Office at Columbus, Ohio, as Second-Class Matter.

THE OHIO JOURNAL OF SCIENCE

PUBLISHED BY THE

Ohio State University Scientific Society

Issued Monthly during the Academic Year, from November to June (eight numbers).

OFFICIAL ORGAN OF THE OHIO ACADEMY OF SCIENCE

Subscription Price: $2.00 per Year, payable in advance; to Foreign Countries, $2.50. Single Copies, 30 Cents.

Editor, JOHN H. SCHAFFNER Associate Editor, JAMES S. HINE Associate Editor, FREDERICK W. IVES

EDITORIAL BOARD

J. F. LYMAN Agricultural Chemistry F. W. IVES Agricultural Engineering A. G. MCCALL Agronomy F. L. LANDACRE Anatomy J. H. SCHAFFNER Botany CARL B. HARROP Ceramic Engineering JAS. R. WITHROW Chemistry F. H. ENO Civil Engineering MINNA C. DENTON Home Economics N. W. SCHERER Forestry C. S. PROSSER Geology V. H. DAVIS Horticulture W. A. KNIGHT Industrial Arts C. J. WEST Mathematics HORACE JUDD Mechanical Engineering JONATHAN FORMAN Pathology F. C. BLAKE Physics R. J. SEYMOUR Physiology (General) CLAYTON MCPEEK Physiology (Medical) E. R. HAYHURST Public Health & Sanitation J. S. HINE Zoology and Entomology

THE OHIO JOURNAL OF SCIENCE is owned and controlled by the Ohio State University Scientific Society. By a special arrangement with the Ohio Academy of Science, the OHIO JOURNAL OF SCIENCE is sent without additional expense to all members of the Academy who are not in arrears for annual dues.

The first fifteen volumes of the old OHIO NATURALIST may be obtained at $1.00 per volume.

Remittances of all kinds should be made payable to the Business Manager, J. S. HINE.

Address The Ohio Journal of Science Ohio State University, Columbus

=Ohio Academy of Science Publications.=

First and Second Annual Reports Price 30 cts. each Third and Fourth Annual Reports Price 25 cts. each Fifth to Sixteenth Annual Reports Price 20 cts. each Seventeenth to Twenty-fourth Annual Report Price 40 cts. each

SPECIAL PAPERS.

1. Sandusky Flora. pp. 167. E. L. MOSELEY 60 cts. 2. The Odonata of Ohio. pp. 110. DAVID S. KELLICOTT 60 cts. 3. The Preglacial Drainage of Ohio. pp. 76. W. G. TIGHT, J. A. BOWNOCKER, J. H. TODD and GERARD FOWKE 50 cts. 4. The Fishes of Ohio. pp. 105. RAYMOND C. OSBURN 60 cts. 5. Tabanidæ of Ohio. pp. 63. JAMES S. HINE 50 cts. 6. The Birds of Ohio. pp. 241. LYNDS JONES 75 cts. 7. Ecological Study of Big Spring Prairie. pp. 96. THOMAS A. BONSER 50 cts. 8. The Coccidæ of Ohio, i. pp. 66. JAMES G. SANDERS 50 cts. 9. Batrachians and Reptiles of Ohio. pp. 54. MAX MORSE 50 cts. 10. Ecological Study of Brush Lake. pp. 20. J. H. SCHAFFNER, OTTO E. JENNINGS, FRED J. TYLER 35 cts. 11. The Willows of Ohio. pp. 60. ROBERT F. GRIGGS 50 cts. 12. Land and Fresh-water Mollusca of Ohio. pp. 35. V. STERKI 50 cts. 13. The Protozoa of Sandusky Bay and Vicinity. F. L. LANDACRE 60 cts. 14. Discomycetes in the Vicinity of Oxford, Ohio. pp. 54. FREDA M. BACHMAN 50 cts. 15. Trees of Ohio and Surrounding Territory. pp. 122. JOHN H. SCHAFFNER 75 cts. 16. The Pteridophytes of Ohio. pp. 41. JOHN H. SCHAFFNER 50 cts. 17. Fauna of the Maxville Limestone. pp. 65. W. C. MORSE 60 cts. 18. The Agaricaceæ of Ohio. pp. 116. W. G. STOVER 75 cts. 19. An Ecological Study of Buckeye Lake. pp. 138. FREDERICA DETMERS 75 cts.

Address: C. W. REEDER, Librarian, Ohio Academy of Science. Library, Ohio State University, Columbus, Ohio.

THE OHIO JOURNAL OF SCIENCE

PUBLISHED BY THE OHIO STATE UNIVERSITY SCIENTIFIC SOCIETY