Front Matter
pp 0
Article description | Article Full Text PDF (994KB)

The Interdependence of Chemical Purity and Scientific Advancement
Woolfolk, E. Oscar pp 193-199
Article description | Article Full Text PDF (784KB)

Seasonal and Daily Chirping Cycles in the Northern Spring and Fall Field Crickets, Gryllus Veletis and G. Pennsylvanicus
Alexander, Richard D.; Meral, Gerald H. pp 200-209
Article description | Article Full Text PDF (822KB)

The First Appearance in Ohio of the Theory of Continental Glaciation
White, George W. pp 210-217
Article description | Article Full Text PDF (2775KB)

Book Review
pp 217-217
Article description | Article Full Text PDF (94KB)

Two New Species of Water Mites from Ohio
Cook, David R. pp 218-222
Article description | Article Full Text PDF (364KB)

New Records of Water Mites from Ohio
Weaver, Andrew A. pp 222-223
Article description | Article Full Text PDF (146KB)

Effect of Light and Carbon Dioxide on the Loss of Manganese from Chlorella Cells
Eyster, Clyde; Woodruff, Marjorie Nix pp 224-227
Article description | Article Full Text PDF (290KB)

Remarkable Sympatry in the Winter Stoneflies Allocapnia Indianae and A. Ohioensis, a Pair of Sister Species
Ross, Herbert H.; Freytag, Paul H. pp 228-232
Article description | Article Full Text PDF (530KB)

The Occurrence of the Coral Genera Pseudozaphrentoides and Lophamplexus in the Pennsylvanian of Ohio
Colson, Calvin T. pp 232-237
Article description | Article Full Text PDF (1278KB)

The Adsorption of a Cationic Surfactant on TiO2 from Aqueous Solutions
Corsaro, Gerald pp 237-239
Article description | Article Full Text PDF (208KB)

A Study of Two Plumage Aberrations in the Male Redwinged Blackbird (Agelaius Phoeniceus)
Schodorf, Robert pp 240-241
Article description | Article Full Text PDF (185KB)

Spatial and Energy Requirements of Beavers
Brenner, Fred J. pp 242-246
Article description | Article Full Text PDF (453KB)

Book Review
pp 246-246
Article description | Article Full Text PDF (75KB)

The Ohio Academy of Science 1967-68
pp 247-248
Article description | Article Full Text PDF (123KB)

Necrology
pp 249-254
Article description | Article Full Text PDF (715KB)

Book Reviews
pp 255-255
Article description | Article Full Text PDF (117KB)

Preparation of Manuscripts for Publication in the Ohio Journal of Science
pp 256-256
Article description | Article Full Text PDF (164KB)

Back Matter
pp 999
Article description | Article Full Text PDF (763KB)