Negative - unidentified man leading class

Negative - unidentified man at desk

Negative - unidentified men at desks

Negative - greenhouses

Negative - men threshing grain

Negative - woman in field

Negative - Baldur Stefansson in greenhouse

Negative - man milking pig

Negative - unidentified man at desk

Negative - laboratory

Negative - grain in greenhouse

Negative - people working in laboratory

Negative - people working in laboratory

Negative - man working with grain and tweezers

Negative - Baldur Stefansson in greenhouse

Negative - Baldur Stefansson in greenhouse

Negative - Baldur Stefansson in greenhouse

Negative - Baldur Stefansson in greenhouse

Negative - Baldur Stefansson in greenhouse

Negative - men in field

Negative - man working with milk

Negative - botanist working on grain

Negative - people working in laboratory

Negative - men in field

Negative - men in field

Negative - men in field

Negative - people working in laboratory

Negative - man demonstrating mower

Negative - man demonstrating mower

Negative - man demonstrating mower

Negative - dandelion with seeds

Negative - grain in greenhouse

Negative - person drawing map

Negative - women in field

Negative - women in field

Negative - stalk of grain

Negative - Department of Agriculture faculty advisory committee

Negative - Department of Agriculture faculty advisory committee

Negative - Clark Hopper

Negative - Alvin Mitchener

Negative - Edward Atkins with hemp field

Negative - unidentified president or dean

Negative - J. R. Weir

Negative - Department of Agriculture faculty advisory committee

Negative - Department of Agriculture faculty advisory committee

Negative - Department of Agriculture faculty advisory committee

Negative - W. C. McKillican

Negative - Department of Agriculture faculty advisory committee