102 
BULLETIN 1330, U. S. DEPARTMENT OF AGRICULTURE 
Ohio Dept. Pub, Instr. Bui. 
Ohio Engin. Soc. Proc. 
Ohio Farmer. 
Ohio Forestry. 
Ohio Geol. Survey Bui. 
Ohio Highway Dept. 
Bui. 
Specif. 
Ohio Jour. Sci. 
Ohio Pub. Health Jour. 
Ohio State Bd. Health Mo. 
Bui. 
Now Ohio Pub. Health 
Jour. 
Ohio State Hort. Soc. Ann. Rpt. 
For continuation see below. 
Ohio State Hort. Soc. Proc. 
Ohio State Univ. Engin. Expt. 
Sta. Bui. 
Ohio State Univ., Timely Soil 
Topics. 
Ohio Teacher. 
Ohio Vet. Med. Assoc. Proc. 
Oil Field Engin. 
Oil, Paint, and Drug Reporter. 
Okla. Acad. Sci. Proc. [Okla. 
Univ.]. 
Okla. Agr. 
Okla. Agr. Col. Ext. Circ. 
Okla. Bd. Vocat. Ed. 
Bui. 
Form. 
Okla. Commr. Highways Ann. 
Rpt. 
Okla. Farmer. 
Okla. Geol. Survey 
Bui. 
Circ. 
Okla. State Bd. Agr. Bien. Rpt. 
Okla. State Pub. Health Dept. 
Bien. Rpt. 
Olympia Agr. Co. Ltd., Re- 
search Dept. Ann. Rpt. 
Olympia Agr. Co. Ltd., Re- 
search Dept. Bui. 
State of Ohio. Department of Public Instruc- 
tion. Bulletin. Columbus. 
Proceedings of the Ohio Engineering Society. 
Norwalk. 
The Ohio Farmer. Cleveland. 
Ohio Forestry. Wooster. 
Geological Survey of Ohio. Bulletin. Co- 
lumbus. 
State of Ohio. Highway Department. 
Bulletin. Springfield. 
Material Specifications. Columbus. 
Ohio Journal of Science. Columbus. 
The Ohio Public Health Journal, of the Ohio 
State Department of Health. Columbus. 
Monthly Bulletin. Ohio State Board of 
Health. 
Ohio State Horticultural Society Annual 
Report. 
Proceedings of the Annual Meeting of the 
Ohio State Horticultural Society. Colum- 
bus. 
The Ohio State University. Bulletin. En- 
gineering Experiment Station. Columbus. 
Timely Soil Topics. Department of Soils. 
The Ohio State University. Columbus. 
The Ohio Teacher. Columbus. 
Proceedings of the Ohio State Veterinary 
Medical Association. Columbus. 
Oil Field Engineering. Chicago. 
Oil, Paint and Drug Reporter. New York. 
Proceedings of the Oklahoma Academy of 
Science. (University of Oklahoma Bulle- 
tin.) Norman. 
The Oklahoma Agriculturist. Stillwater. 
Oklahoma Agricultural and Mechanical Col- 
lege. Extension Service. Circular. Still- 
water. *\>^ 
Oklahoma State Board of Vocational Eduv " 
tion. Oklahoma City. 
Bulletin. 
Form. 
Annual Report of the Commissioner of High- 
ways. Oklahoma City. 
Oklahoma Farmer. Oklahoma City. 
Oklahoma Geological Survey. Norman. 
Bulletin. 
Circular. 
Biennial Report of the Oklahoma State Board 
of Agriculture. Guthrie. 
Biennial Report of the Oklahoma State Public 
Health Department. Oklahoma City. 
Olympia Agricultural Company, Ltd. Re- 
search Department Annual Report. Off- 
church, Leamington, England. 
Bulletin. Olympia Agricultural Company, 
Ltd. Research Department. Off church, 
Leamington, England. 
