BOLLEY, HENRY LUKE (1865— ), American bota nist, was born in Dearborn county, Ind., on Feb. 1, 1865. He graduated at Purdue university in 1888 and was assistant botanist at the Indiana State experiment station from 1889-9o, when he was named botanist and zoologist in the North Dakota agricul tural college and experiment station. From 1909 he was dean of biology in the college, botanist and plant pathologist in the experiment station and State seed commissioner. He devoted him self chiefly to plant pathology, and originated various methods of disinfection for grains and also several new varieties of flax. In i9o8 he published The North Dakota Pure Seed Law in explana tion of legislation which he had originated. He also proposed a system of crop rotation based upon "the planting in series of genetically non-related crops, so distantly non-related that they do not bear each other's disease factors." He published a List of Seed-bearing Plants of North Dakota (19oo), Seed Disinfection and Crop Production (I 9i o) and numerous bulletins on potato scab, wheat rust, grain smuts, flax wilt, weed control and similar subjects.