X 
Journal of Agricultural Research 
Vol. i 
Page 
numerous young plants of Artemisia tridentata and a 
dense herbaceous covering of Bromus tectorum and alfilaria 
(.Erodium cicutarium). Fig. 3.—Sagebrush reestablished 
on land which has been in cultivation and the original, 
undisturbed sagebrush vegetation. 418 
Plate XL VI. Fig. 1.—Line of contact between the sagebrush association 
and the Kochia association, showing the characteristically 
sharp demarcation of the two types. Fig. 2.—A typical 
view of the Kochia association, with plants rather far 
apart and very uniform in size and appearance. Fig. 3.— 
Plants of Kochia vestita , 4 or 5 inches high, and the grass 
Poa sandhergii, which is usually associated with the Ko¬ 
chia in land that is not grazed. 418 
XLVII. Fig. 1.—Typical shadscale vegetation, consisting of a nearly 
pure stand of A triplex confertifolia , showing much dead- 
wood, as is usually the case, but the stand is denser than 
in much of the area occupied by this association. 
Fig. 2.—Transition area between the shadscale and the 
greasewood-shadscale types of vegetation. Fig. 3.—Salt 
grass ( Distichlis spicata) covering the whole of the depres¬ 
sion to the right with the exception of a colony of Allen- 
rolfea in the middle distance. 418 
XLVIII. Fig. 1.—Salt-flat vegetation, Allenrolfea community. 
Fig. 2.—Salt-flat vegetation, showing plants of Salicornta 
uiahensis . Fig. 3.—Grass-flat vegetation, Sporobolus- 
Chrysothamnus community, showing a species of rabbit 
brush, associated with tussock grass. 418 
XLIX. Citropsis Schweinfurthii grafted on grapefruit stock (Citrus 
decumana ), showing vigorous growth made in 2% years.. 436 
L. Fig. 1.—Yellow Bellflower apple tree in full bloom on 
April 16, 1912, showing effect of spraying with a solution 
tion of nitrate of soda plus caustic potash on February 
2 previous. Fig. 2.—Unsprayed check tree for com¬ 
parison with figure 1. 444 
LI. Fig. 1.—A branch from a Yellow Bellflower tree in full 
bloom on April 10, 1913, showing the effect of spraying 
with a solution of nitrate of soda plus caustic soda on 
February 3 previous. Fig. 2.—A branch from an un¬ 
sprayed check tree for comparison with figure 1. 444 
LII. Fig. 1.—Split radial face of a creosoted hickory block, 
showing tyloses in a large vessel. Fig. 2.—Tangential 
section of Aesculus octandra (yellow buckeye), showing 
two tyloses which have grown out of one medullary-ray 
parenchyma cell. Fig. 3.—Cross section of valley oak, 
a white oak, showing young tyloses next the bark in 
vessels. 470 
LIII. Fig. 1.—Cross section of a white oak, showing fully devel¬ 
oped tyloses in the large vessels. Fig. 2.—Radial-lon¬ 
gitudinal view, quarter-sawed surface, of the white oak 
shown in figure 1, showing complete closing of the vessel. 
Fig. 3.—Cross section of sapwood of pignut hickory, 
showing fully developed tyloses. Fig. 4.—Radial view 
of mesquite, showing “gum” droplets and formation 
often stimulating tyloses 
470 
