SUBJECT INDEX 



306 



HydrauUo— Continued, 

 rams — continued 

 notes, (27) 2^2. 

 types of, (36) 89. 

 Hydraulios— 



in United States, (27) 188. 

 primer, (27) 385. 

 problems, notes. (27) 789. 

 textbook, (37) 584. 



treatise, (28) 288, 588; (31) 383, 587; (35) 786. 

 Hydrazin— 



effect on blood fat and blood sugar, (36) 164. 

 sulpbate, effect on hemolytic reaction, (36) 878. 

 Hydrellia griseola, notes, (27) 560. 

 Hydrin, effect on butter and margarin, (26) 778. 

 Hydriodic acid salts, use against tuberculosis, (29) 



481. 

 Hydriomena spp., in Vancouver Island, (34) 651. 

 Hydrocampa (Nymphula) nymphaeata, notes, (37) 



847. 

 Hydrocarbons — 



determination, (28) 511. 

 fatty, development of fungi on, (29) 133. 

 heavy, detection, (29) 529. 

 isolation from plants, (26) IOC. 

 petroleum, absorption in the intestine, (29) 768. 

 Hydrochelidon nigra surinamensis, notes, (27) 355. 

 Hydrochinon, effect on cyanogen formation in 



plants, (28) 527. 

 Hydrochloric acid — 

 effect en- 

 action of raaltase, (28) 504. 

 bread fermentation, (27) 268. 

 hemolytic reaction, (36) 878. 

 mineral excretion of dogs, (38) 570. 

 plants, (37) 224. 

 rotatory power of sucrose and invert sugar, 



(37) 802. 

 sprouting of potatoes, (32) 829. 

 estimation, colorimetric scale for, (40) 505. 

 forcing plants with, (28) 837. 

 leaf injury or loss due to, (35) 243. 

 salts, use against tuberculosis, (29) 481. 

 toxicity, (28) 662. 

 Hydrochloroplatinicacid, preparation, (37) 409. 

 Hydrocyanic acid — 



determination, (32) 300; (34) 11; (35) 413, 503; 



(40) 804. 

 determination in — 



beans, (27) 310; (36) 714. 

 feeding stuffs, (33) 506. 

 plants, (30) 709. 

 sorghum, (37) 113. 

 effect on — 



catalytic power of soils, (28) 118. 

 hydrolysis in plants, (26) 531. 

 plants, (39) 224; (40) 745. 

 evolution from laurel leaves, (26) 228. 

 evolution from linseed meal, (27) 276. 

 for fumigation, preparation, (39) 161. 

 formation — 



from proteins, (30) 802. 

 in feeding stuffs, (28) 377. 

 linseed cake, (28) 377, 378. 

 plants, (31) 826. 

 seeds, (27) 132; (35) 332. 

 fumigation of plants with, (31) 57. 

 gas- 

 as fumigant, (35) 53. 

 as soil fumigant, (32) 245; (38) 457. 

 detection, (38) 258. 

 gas, effect on- 

 baking quality of flour, (26) 357. 

 cotton, (35) 2.54. 

 cucumbers, (30) 142. 

 insects and plants, (37) 660. 

 leaf-roller eggs, (40) 162. 

 plants, (33) 522; (38) 330. 

 scale insect eggs, (33) 855. 

 subterranean larvae, (40) 266. 

 tobacco, (31) 747. 



gas- 



fumigating greenhouses with, (29) 41. 

 fumigating machines for, (33) 556. 

 fumigation, (27) 356; (28) 352; (29) 640; (34) 



653; (35) 678; (38) 155, 158, 458. 

 generation by portable machines, (34) 191. 

 generator, (39) 256. 



Hydrocyanic acid— Contiuued. 

 gas— continued. 



insecticidal value, (34) 262. 



poisoning by, (39) 161. 



toxicity, (2G) 864. 



use against household insects, (32) 840; (34) 



854. 

 use against mill insects, (30) 1.55. 

 in Cassava, (33j 260, 66.5; (37) 168. 

 cherry laurel, studies, (29) 133. 

 flax, (28) 477; (30) 380. 

 flaxseed screenings, (26) 86. 

 fungi, (26) 228. 

 grains in liot regions, (30) 30. 

 haricot beans, (33) 866. 

 Isopyruni spp., (39) 27. 

 Johnson grass, (29) 869. 

 kafir and sorghum, (."iO) 584. 

 leguminous plants, (37) 28. 

 Ornithopus spp., (34) 525. 

 plants, (27) 635; (28) 36, 429; (29) 713; (31) 



.520; (39) 332. 

 seed and stone fruits, (27) 11. 

 sorghum, (27) 77; (33) 234; (35) 340; (40) 804 

 Tridens flavus, (35) 413. 

 white clover, (30) 36. 

 liberation from linseed, (35) 167. 

 production by bacteria, (30) 802. 

 relation to maturity of almonds, (26) 228. 

 role in plants, (28) 128. 

 utilization by plants, (31) 730. 

 Hydroecia micacea, notes, (26) 353. 

 Hydroelectric- 

 development at Tallulah Falls, Ga., c27; 316. 

 development in California, (34), 682. 

 energy for irrigation pumping, (27) 889. 

 power, treatise, (36) 783. 

 works in United States, (27) 188. 

 Hydrogen — 



analysis, apparatus for, (40) 111. 



chlorid gas, effect on diastase and invertase, (31) 



806. 

 cyanid, detection, (26) 206. 

 cyanid, determination, (28) 310. 

 cyanid, in bird's foot clover, (27) 30. 

 determination, (37) 803. 

 dioxid, effect on soils, (28) 123. 

 dioxid solutions, examination, (27) 208. 

 electrode, description, (34) 712, 804. 

 electrode potential as affected by pressure, (36) 



503. 

 peroxid — 



action on lactic acid and glucose, (28) 202. 

 as food preservative, (30) 364. 

 as oxidizer, (37) 409. 

 as seed sterilizer, (29) 844. 

 detection in milk, (34) 507. 

 peroxid, effect on — 



amylase of human milk, (30) 311. 

 autolysis of plant proteins, (26) 801. 

 ferments, (28) 112. 



germination of seeds, (26) 820; (27) 201. 

 glycerol, (29) 309. 

 guaiae reaction in milk, (27) 507. 

 invert sugar, (27) 812. 

 milk, (29) 806. 



milk tests for formaldehyde, (30) 414. 

 seeds, (27) 132. 

 peroxid, hydrolytic action, (27) 712. 

 peroxid, persistence in milk, (35) 11. 

 peroxid, saccharification of starch by, (28) 19, 



609. 

 preparation and purification, (40) 607. 

 sulphid— 



effect on concrete, (28) 589. 

 generator, description, (39) 714. 

 precipitation under pressure, (37) 712. 

 Hydrogenation— 



catalytic, in presence of carbon monoxid, (38) 



409. 

 of oils, treatise, (32) 416. 

 Hydrogen-ion concentration — 



determination, (35) 110; (36) 13, 111; (37) 606; 



(38) 225; (39) 9. 

 effect on germination of Gramineae, (38) 24. 

 effect on growth of barley seedlings, (38) 736. 

 treatise, (32) 801. 



