ERRATA AND AUTHORS' EMENDATIONS 



Page 54, line i. should read "Fj or Fi" instead of "Fa or F." 



Page s8. Table V, under last column the first number should read 33 instead of 23. 



Page 68, line 24, should read "with a nutrient solution" rather than "with an nutrient solution." 



Page 69, lines 9 and 11, should read "O. A. Pratt" instead of "A. C. Pratt." 



Page 76, line 3, should read "Plate 11, A" instead of "Plate 11, B." 



Page 80 and following, in Plates 10 and 11, fis^res A and C of Plate 10 should be interchanged with figures 

 A and C of Plate 11. 



Page 174, line i, should read "causal" not "casual." 



Pages 175 and 177, and Plates 2a and 24, running head should read, "Transmissible Mosaic Disease of 

 Chinese Cabbage " instead of " Transmissible Mosaic Disease of Cabbage." 



Page 178, colored plate is by J. Marion Shull. 



Page 242, line 8, should read "Humphrey, as reported by Jones (5)," not "Humphrey (4) states . . . ." 



Page 282, line 32, should read "at each treatment" instead of "to each treatment." 



Page 283, line 17, should read "nitric acid," not ''nitri acid." 



