48 BULLETIN NO. 161 



19. Marvin, Charles Frederick, Papers on Frost and Frost Protection in 



the Unitd States, U. S. D. A. Weather Bureau, No. 542, pp. 583-585. 



20. Mitchell, Alexander J., Papers on Frost and Frost Protection in the 



United States, U. S. D. A. Weather Bureau, No. 542, pp. 588-589. 



21. O'Gara, P. J., Bulletin No. 6 of the Office of the Pathologist and 



Local U. S. Weather Bureau Station for Rogue River Valley. 



22. Reed, Wm. G., and Cora L. Feldkamp, Seleceted Bibliography of 



Frost in the United States, Monthly Weather Review, October, 

 1915, 43, 512-517. 



23. Smith, J. Warren, Papers on Frost and Frost Protection in the 

 United States, U. S. D. A. Weather Bureau, No. 542, pp. 573-583. 



24. Sprague, Malcolm, Papers on Frost and Frost Protection in the 



United States, U. S. D. A. Weather Bureau, No. 542, p. 590. 



25. Sandsten, E. P., Conditions which Effect the Annual Time of 



Flowering of Fruit Trees, Wisconsin Experiment Station Bulletin 

 137, April, 1906. 



:^6. Thiessen, A. H., Probability of Success in Smudging Proceedings 

 of the Eighth Annual Convention of the Utah State Horticultural 

 Society, January, 1912, pp. 40-48. 



27. Thiessen, A. H., Papers on Frost and Frost Protection in the 



United States, U. S. D. A. Weather Bureau, No. 542, p. 586. 



28. Vorhees, J. T., Papers on Frost and Frost Protection in the 



United States, U. S. D. A. Weather Bureau, No. 542, p. 587. 



29. West, F. L., and Edlefsen, N. E., The Freezing of Fruit Buds, 



Utah Experiment Station Bulletin 151. 



0. Whipple, O. B., Winter Injury to the Fruit Buds of the Apple and 

 Pear, Montana Experiment Station Bulletin 91. 



31. Whitten, J. C., Winter Protection of Peach Buds of the Peach, 

 Missouri Experiment Station Bulletin 38, 1897. 



(College Series No. 57) 



