Oct. 4, 1915-Mar. 27, 1916 
Illustrations 
XVII 
An Asiatic Species op Gymnosporangium Established in Oregon 
Page 
Plate LXXVIII. Fig. 1.—^Ecial stage of Gymnosporangium koreaense on under 
surface of leaf of Pyrus sinensis. Fig. 2.—Telial stage of G. koreaense on 
young twigs of Juniperus chinensis ; sori not distended. Fig. 3.—Same as 
figure 2, with sori distended. 1010 
Plate LXXIX. Fig. 1 .—Gymnosporangium koreaense on leaves, petioles, and 
stems of Pyrus sinensis. Fig. 2.— G. koreaense on Cydonia vulgaris . 1010 
Relation op Stomatal Movement to Inpection by Cercospora 
BETICOLA 
Plate LXXX. Fig. 1.—Stomatoscope designed by Dr. F. E. Lloyd and used 
for a part of these studies. Fig. 2.—Humidity box in place over plants in 
the greenhouse for maintaining different relative humidities; also a cog 
psychrometer used for checking hygrothermographs kept among the sugar- 
beet plants. 1038 
Plate LXXXI. Cercospora beticola Sacc: Conidia germinating on a sugar-beet 
leaf, with germ tubes entering open stomata. 1038 
A New Penetration Needle por Use in Testing Bituminous 
Materials 
Plate LXXXII. Fig. 1.—Direct enlargement of a package of No. 2 sewing 
needles, showing the variations in shape. Fig. 2.—Direct enlargement of 
penetration needles, showing the comparison between two standard needles 
and seven needles of the new type prepared by the writers. 1126 
Relation op Green Manures to the Failure op Certain Seed¬ 
lings 
Plate LXXXIII. Cotton seedlings, showing the effect of green manures on 
their growth; Fig. 1.—Effect of different kinds of green manures added 
to the soil. Fig. 2.—Effect of planting immediately after plowing under 
green manure. Fig. 3.—Effect of planting 2 weeks after plowing under 
green manure. Fig. 4.—Effect of the depth of green manure on germina¬ 
tion. Fig. 5.—Effect of sterilized and unsterilized oats used as a green 
manure. Fig. 6.—Effect of Rhizoctonia sp. on germination in the pres¬ 
ence of green manure. 1176 
Plate LXXXIV. Clover, flax, and cotton seedlings, showing the relation 
of green manures to germination in sterilized and unsterilized soil: 
Fig. 1, 2.—Clover. Fig. 3, 4.—Flax. Fig. 5, 6.—Cotton. 1176 
A New Spray Nozzle 
Plate LXXXV. The beginning of the spray from three kinds of nozzles, as 
photographed with a moving-picture camera. 1182 
Plate LXXXVI. Fig. 1.—The appearance of spray from three kinds of nozzles 
as full pressure is applied (a continuation of Plate LXXXV). Fig. 2.—Two 
stages at the end of the spray as the pressure is reduced. 1182 
2 7468 °—16-2 
