INDEX 
Page 
Absorption of Carbon by the Roots of Plants: 
J. F. Breazeale.......303-3 ” 
Acer negurtdo , red stain in. 449-458 
Acetaldehyde, testing for rancidity. 330 
Acetic add, testing. 339 
Addity— 
cream, relation to feathering in coffee— 543-546 
Rhizopus spp., and pectinase production. 369-370 
soil, origin, causes, measurements. 114-119 
Acids— 
chufa oil. 78-82 
production and examination.. 326-333* 369-371? 493 
Acrolein, examination and reaction with hy¬ 
drogen peroxid. 335 - 336 ? 338? 348? 360 
Action of Sodium Nitrite in the Soil: R. H. 
Robinson. i ~7 
Active Chlorin as a Germicide for Milk and 
Milk Products: Harrison Hale and William 
L. Bleecker. # . ; . 375-382 
Adsorption, comparison with absorption, 
demonstration of process. . 84,114 ,117 
A grotis aquilina disease, observations in Italy. 487 
Aldehydes, unsaturated, examination in ran- 
ddity studies. 335“336 
Alfalfa, destructionby root rot,and reestablish¬ 
ment. 405-408,412 
Allen, Ruth F.: Cytological Studies of In¬ 
fection of Baart, Kanred, and Mindum 
Wheats by Puccinia grambits tritici. Forms 
III and XIX. 571-604 
Almond oil, earth. 77 
Alumino-silicates, acidity caused by weath¬ 
ering. U 5 -H 7 
Amitermes spp., description and habits.... 291-293 
Ammonia, use as refrigerant... 185,190 
Anoplotermes gracilis , description and 
habits. 299-300 
Ants— 
enemies of false wireworm. 562 
termites. 287,294*296 
white. See Termites.... 279-302 
A panicles congregatus, parasitism on horn- 
worms. 484 
Apple scald, control by oiled wrappers, oils, 
and waxes. 5 I 3-536 
Apricot, tumor, new.45~6o 
Aralia cor data Thunb,, two diseases of.271-278 
Arsenate of lead, colloidal, preparation and 
properties. 373~374 
Aspergillus niger, penetration into wood, 
studies... 220,223,225,227 
Autoclaving, effect on toxicity of cottonseed 
meal.... v 9 "*o 
Auxotaxic Curve as a Means of Classifying* 
Soils and Studying Their Colloidal Proper¬ 
ties: A. E- Vinson and C. N. Catlin. 11-13 
Avocado trees, termites, occurrence. 287,289,290,298 
Azelaic acid, from rancid fats, examina¬ 
tion. 323*325*326,328 
Azelaic, half aldehyde, testing for rancidity. 326,330 
Baart wheat, stemrust infection, cytological 
studies. 573 - 579 * 592 - 594 * 597-6oi 
Bacillus — 
acridiorum — 
cause of grasshopper disease, comparison 
with B. sphingtdis .482-483,485,492,495 
comparison with B. noctuarum.. .492,495 
coli communis, destruction by chlorin-376-381 
noctuarum — 
cause of cutworm septicemia....488-491 
comparison with B. spkingidis and B. 
acridiorum . 492*495 
transmission method. 494 
sorghi, cause of sorghum blight, compari¬ 
sons. 157-158 
Page 
Bacillus —Continued. 
sphingidis— 
cause of homworm septicemia.478-483 
comparison with Bacillus acridiorum . 482- 
483,485* 492,495 
noctuarum .492,495 
transmission methods. 484 
Bacteria, milk, destruction by chlorin.375-382 
Bacterial Stripe Disease of Proso Millet: Char¬ 
lotte Elliott. 151-160 
Bacterium — 
andropogoni , cause of broom com disease.. . 158 
tumefaciens, crowngall organism, morphol¬ 
ogy. 425-436 
Bacto-purple lactose agar, composition. 380 
Barley, susceptibility to infection by Helmin- 
thosporium sativum . 198,204,216 
Baughman, Walter F., and Jamieson, George 
S.: The Constituents of Chufa Oil, a Fatty 
Oil from the Tubers of Cyperus esculentus 
Linn6. 77-82 
Bean weevil, four-spotted, biology notes... 609-616 
Beans, seedling growth, relation to tempera¬ 
ture and initial weight of seeds. 537”539 
Beeswax, use on apples to control scald, for¬ 
mulas. 529-531 
Beets— 
mother, time for testing. 125-150 
stored, loss of sugar, tests. 126-149 
* Bibliography— 
Coleoptera. 565-566 
otocephaly. 180-181 
rancidity.360-362 
soil acidity. 120-123 
wheat rusts. 602-604 
Biological Notes on the Termites of the Canal 
Zone and Adjoining Parts of the Republic 
of Panama: Harry F. Dietz and T. E. 
Snyder.,. 279-302 
Biology of the False Wireworm Eleodes su- 
turalis Say.: J. S. Wade and R. A. St. 
George. 547-566 
Birds, enemies of false wireworm. 562 
Blaps suturalis, same as Eleodes suturalis - 548 
Bleecker, William L., and Hale, Harrison: 
Active Chlorin as a Germicide for Milk and 
Milk Products.’.375-382 
Blight, sorghum, description, and compari¬ 
sons. 157-158 
Bliss, C. I., and Runner, G. A.: The Three- 
Banded Grape Leafhopper and Other Leaf- 
hoppers Injuring Grapes.419-424 
Borer, oak sapling— 
food plants and control.316,317 
Goes tesselatus .313-318 
Botrytis spp., effect on cell walls of plants... 594. 
595 . 598 
Bowen, John T.: A Method of Automatic 
Control of Low Temperatures Employed by 
the United States Department of Agricul¬ 
ture. 183-190 
Boxelder, red stain in the wood.449-458 
Breazeale, J. F.: The Absorption of Carbon 
by the Roots of Plants.303-3” 
Breeding, guinea pigs, experiments. 163-180 
Brine, use as refrigerant. 183,190 
Briuley, F. J.: Preparation and Properties of 
Colloidal Arsenate of Lead. 373“374 
Brooks, Charles, Cooley, J. S., and Fisher, 
D. F.: Oiled Wrappers, Oils, and Waxes in 
the Control of Apple Scald. 513-536 
Brooks, Fred E.: Oak Sapling Borer, Goes 
tesselatus Haldeman. 313-318 
Broom corn, bacterial disease, description and 
comparisons.. 157-158 
Bruchus quadrimaculatus, biology notes.... 609-616 
71690—25 -f 2 
(617) 
