June 1941] Agricultural Research in New Hampshire 13 



At the time of his death Dr. Butler was engaged in several re- 

 search projects, one of which, "Control of Apple Scab," is now being 

 prepared for publication. Other investigations included effect of 

 temperature and other environmental factors on symptoms of potato 

 mosaic; spray injury by lime sulphur; effect of temperature on stor- 

 age of potatoes; control of bitter pit of apple; peony diseases; and 

 control of poison ivy. 



Dr. Butler's published works comprise many technical papers, 

 including significant contributions to the series of technical bulletins 

 of the University of New Hampshire and many other scientific papers. 



A list of his published works follows : 



Technical Bulletin 



8— Bordeaux Mixture, 1914. O. Butler. 



13— Physiology of the Apple, 1917. O. Butler, T. O. Smith, B. C. Curry. 

 21 — Bordeaux Mixture. II. Stimulatory Action, June, 1922. O. Butler. 

 22 — Experiments on the Field Control of Snapdragon Rust Together With a 



Description of a Method for the Control of the Disease in Greenhouses, 



May, 1923. O. Butler. 

 36 — Spray Solutions and the Control of Apple Scab, June, 1928. O. Butler 



and W. L. Doran. 

 56 — Burgundy Mixture, September, 1933. O. Butler. 



Scientific Contribution 



9— Methods of Preparation and Relative Value of Bordeaux Mixtures, 



1915. O. Butler. 

 10 — The Cuprammonium Washes, 1917. O. Butler. 

 12 — The Effect of the Environment on the Loss of Weight and Germination 



of Seed Potatoes During Storage, 1918. O. Butler. 

 14 — Relative Adhesiveness of the Copper Fungicides, 1919. O. Butler and 



T. O. Smith. 

 !5_Effect of Wounds on Loss of Weight of Potatoes, October, 1919. O. 



Butler. 

 16 — On the Amount of Copper Required for the Control of Phytophthora 



Infestans on Potatoes, June, 1920. O. Butler. 

 18— Relation of Potassium to Growth of Plants, April 1921. O. Butler and 



T. O. Smith. 

 20 — On the Use of the Acetates of Copper as Fungicides, January 1922. O. 



Butler and T. O. Smith. 

 22— Spraying for Late Blight of Potatoes, April 1920. O. Butler. 

 24 — Effect of Size of Seed Used in Commercial Planting on the Incidence of 



Leaf-Roll and Mosaic in Potatoes, June 1929. O. Butler. 

 25 — Experiments on the Control of Mustard, R. Bissey and O. Butler. 

 27 — Effect on Plants of Cyanide Fumigation Following Spraying with Bor- 

 deaux Mixture, May 1930. O. Butler and R. R. Jenkins. 

 38 — Effect of Nitrate of Potash on the Vigor and Productivity of Healthy 



and Leaf-Roll Green Mountain Potato Plants and Their Progenies, 



November 1932. O. Butler and H. L. Murray. 

 39— The Use of Kainite for the Control of Poison Ivy, December 1932. O. 



Butler. 

 41_Effect on the Growth of Oats of Copper Sprays Used for the Control 



of Mustard, August 1934. O. Butler and R. Bissey. 

 45 Effect of Applications of Sodium Chlorate and Ammonium Thiocyanate 



on Subsequent Sowings of Wheat, October 1934. R. Bissey and O. 



Butler. 



