XII Journal of Agricultural Research voi. v 



Pathogenicity and Identity of Sclerotinia libertiana and Sclero- 

 tinia smilacina on ginseng 



Page 

 Plate XXVIII. Sclerotinia libertiana: Fig. i. — Root inoculated with Sc/era//)u'a 

 libertiana from lettuce. Fig. 2 . — Three roots (on left) inoculated with Sclero- 

 tinia sp. from ginseng. Healthy check root (on right). Fig. 3. — Apothecia 

 from sclerotia from celery strain. Fig. 4. — Apothecia from sclerotia from 



ginseng strain 298 



Plate XXIX. Sclerotinia smilacina: Fig. i. — Ginseng roots showing the char- 

 acteristic black color from artificial inoculation. Fig. 2. — Rhizomes of 

 Smilacina racemosa inoculated with a species of Sclerotinia isolated from 

 ginseng 298 



An Improved Respiration Calorimeter for Use in Experiments with 

 Man 



Plate XXX. General view of the respiration calorimeter 348 



Plate XXXI. Fig. i. — Structural iron framework for respiration chamber. 



Fig. 2. — Copper- walled chamber attached to inside of iron framework. . . . 348 



Plate XXXII. Fig. i. — Zinc wall attached to outside of iron framework, with 

 all but the last sections shown in place. Fig. 2. — Devices for circulating 

 and purifying air 348 



Plate XXXIII. Fig. I. — Special container for sulphuric acid, to remove 

 water vapor from air passing through it. Fig. 2. — A small absorber train 

 for removing water vapor and carbon dioxid from sample of residual air. . . 348 



Plate XXXIV. Fig. i. — Balance for weighing oxygen cylinder and end 

 view of absorber table. Fig. 2. — Method of attaching heating and cool- 

 ing systems to zinc wall 348 



Plate XXXV. Fig. i. — Interior of respiration chamber with subject as seen 

 through the window. Fig. 2. — Apparatus for regulating and measuring 

 the temperature of water 348 



Plate XXXVI. Fig. i. — Observer's table. Fig. 2. — Devices for regulating 



temperature of water for heat absorber 348 



Varietal Resistance of Plums to Brown-Rot 



Plate XXXVII. Fig. i. — Lenticel in ripe fruit of Sapa plum. Fig. 2. — Len- 

 ticel in ripe fruit of Gold plum partially filled with parenchymatous cells. 

 Fig. 3. — Lenticel in green Burbank plum. Fig. 4. — Lenticel in green fruit 

 of B X W21 completely filled with parenchymatous tissue. Fig. 5. — Ripe 

 healthy tissue of Sapa plum, showing middle lamella completely dissolved 

 out, owing to ripening process. Fig. 6.^Ripe healthy tissue of Reagan 

 plum two weeks after picking 396 



Plate XXXVIII. Fig. i.— Infection through a lenticel of Burbank plum the 

 cavity of which is lined with corky-walled cells. Fig. 2. — Left side of 

 figure I in detail, showing hyphas entering the fruit tissue after the epider- 

 mis has been raised by the growth of the hyphas in the stomatal cavity. 

 Fig. 3. — Infection through a lenticel in B X W4. Fig. 4. — Infection 

 through a stoma in a young green fruit of Prunus americana seedling No. i, 

 in which no corky walls have yet been formed. Fig. 5. — Infection through 

 a lenticel of the same type as is shown in figures i and 3. Fig. 6. — Half- 

 grown fruits of B X W15 completely rotted through woimd inoculations. 

 Fig. 7. — Half -grown fruits of B X W21 completely rotted through wotmd 

 inoculations. Fig. 8. — Half-grown fruits of A X W15 completely rotted 

 through woimd inoculations. Fig. 9.- — Half-gro-p-n fruits of Etopa plum 

 completely rotted through wound inoculations, and completely covered 

 with large spore tufts 396 



