VIII 
Journal of Agricultural Research 
Vol. VIII 
Page 
Pi,ATE 49. 1.—Under surface of a cauliflower leaf from the same series as Plate 
48 but nine days after 15 minutes * exposure to vapor of ammonia. 2.—Same 
series as figure 1, but at the end of 18 days, and from the upper surface of a 
leaf. 188 
Plate 50. 1.—Cross section of a normal cauliflower leaf. 2.—Early stage 
of cauliflower intumescence due to vapor of ammonia. 188 
Plate 51. 1, 2.—Free-hand unstained sections from old cauliflower intu¬ 
mescences caused by vapor of ammonia. 188 
Plate 52. 1,2.—Vertical sections of two ammonia-vapor intumescences on a 
cauliflower leaf. 188 
Plate 53. 1.—Like Plate 52 but here the palisade tissue is also involved. 2. 
—Cross section of an ammonia intumescence above the level of the under 
surface of the leaf... 188 
Plate 54. 1, 2.—Cross sections through the deeper tissues of two ammonia 
intumescences in a cauliflower leaf. 188 
Plate 55. Cauliflower leaf showing killing effect of mixed ethyl alcohol and 
acetic acid on maturer leaves of the same plant as Plate 56. 188 
Plate 56. Under surface of a cauliflower leaf showing intumescences produced 
by the vapor of mixed ethyl alcohol and acetic acid.. 188 
Plate 57. 1.—Cauliflower intumescences due to vapor of mixed ethyl alcohol 
and acetic acid, 2.—An enlargement of the right-hand tumor shown in 
figure 1. 188 
Plate 58. 1-5.—Cross sections from fixed and stained portions of the little 
tumors which developed on the leaf shown in Plate 56. 188 
Plate 59. Cross section of one of the intumescence of Plate 56. 188 
Plate 60. Vertical sections from fixed and stained portions of cauliflower intu¬ 
mescences shown on Plate 56 and in cross section on Plates 58 and 59. 1.— 
Middle vascular bundles giving off incipient vessels to the tumor. 2.—Sieve 
tubes and incipient xylem vessels developing. 3.—Section through the 
middle of an intumescence which received a minimum of stimulation and in 
which only the epidermis and two layers of cells immediately under it have 
responded. 188 
Plate 61. 1.—Like figures 1 and 2 of plate 60, but with the intumescence still 
covered by an epidermis and free from cork. 2.—Alcohol-acetic-acid intu¬ 
mescence in which entire thickness of the cauliflower leaf is involved. 188 
Plate 62. 1,2.—Intumescences formed on a cauliflower leaf exposed 30 minutes 
in 10X cubic feet of air space to vapor liberated from one-half gm. of second¬ 
ary methylamin chlorid. 1.—Under surface of leaf corresponding to figure 
2. 2.—Upper surface of same leaf. 188 
Plate 63. 1.—Same as plate 62, but photographed by transmitted light. 2.— 
Under surface of one of many leaves of a cauliflower plant exposed to vapor 
of primary ethylamin. 188 
Plate 64. 1.—Paraffin-embedded stained section of cauliflower leaf exposed to 
secondary methylamin. 2. Cross section of cauliflower leaf exposed to 
primary ethylamin. 3. Same leaf and section as figure 2, but from a normal 
portion. 188 
Plate 65. 1.—-Portion of ring of concentric medullary bundles in the axis of in¬ 
florescence of Ricinus communis. 2 .—Group of concentric medullary bun¬ 
dles in a branch-gap of Ricinus communis .. 188 
SOROSPORELLA UVELLA AND ITS OCCURRENCE IN CUTWORMS IN AMERICA 
Plate 66. Sorosporellauvella: A.—Larvaof Euxoatessellata infected with Soro- 
sporellauvella. B, C.—Spore masses. D.—A portion of a spore mass. E.— 
