THE CROWN GALL: TRANSMISSION 471 



a few out of many instances of such transfers that have come to 

 my attention in recent years. 



LITERATURE 



Read Bulletins 213 and 255, Bureau of Plant Industry, U. S. 

 Dept. of Agriculture (to be had from Superintendent of Docu- 

 ments, Government Printing Office, Washington, D. C., price 

 40 cents and 50 cents respectively). See also " Bacteria in Rela- 

 tion to Plant Diseases," Vol. II, Figs. 24, 26, 28, 29, and Plates 

 5a, 56, 7, 8, and 10; Phytopathology, Vol. I, pp. 7-11; and Brook- 

 lyn Botanic Garden Memoirs I, 1918, p. 448. 



For suggested relations to cancer see also seven summaries 

 by the writer: (1) "Le Cancer est-il une maladie du regne 

 vegetale?" in Proceedings of the ler Congres International de 

 Pathologic Comparee, held in Paris in October, 1912 (Tome II); 

 (2) "Cancer in Plants" in Proceedings of the 17th International 

 Congress of Medicine held in London, August, 1913 (volume de- 

 voted to Section III, General Pathology and Pathological 

 Anatomy); (3) "Studies on the Crown Gall of Plants: Its rela- 

 tion to Human Cancer" (The Journal of Cancer Research, April, 

 1916); (4) "Further Evidence that Crown Gall of Plants is 

 Cancer" (Science, N. S., June 23, 1916); (5) "Mechanism of 

 Tumor Growth in Crown Gall" (Jour. Agr. Res., Jan. 29, 1917); 

 (6) "Mechanism of Overgrowth in Plants" (Proc. Am. Phil. 

 Soc., vol. 56, 1917); (7) "Embryomas in Plants: Produced by 

 Bacterial Inoculations" (The Johns Hopkins Hospital Bulletin, 

 Sept., 1917). 



Read C. O. Jensen, " Undersp'gelser vedr^rende nogle svulst- 

 lignende Dannelser hos Planter." [Investigations concerning 

 some tumor-resembling growths in plants.] Kgl. V eterinaer-og 

 LandbohfyskolesAarsskrift, Copenhagen, 1918. Serum laboratory 

 No. LIV. This paper embodies ten years' study of crown gall 

 from the animal (cancer) pathologist 's standpoint. 



Read "Crown Gall Injury in the Orchard" by Dean B. Swin- 

 gle and H. E. Morris, Bull. 121, Agr. Exp. Sta., Bozeman, 

 Mont,, Jan., 1918, pp. 124 to 139, with 6 text figures. Their 

 experimental work deals with the effect (injurious) of crown gall 

 on apple trees and covers a period of 8 years. 



