SUBJECT INDEX 



329 



Leaf — Continued . 



sheath, value in descriptive botany, (3C) 628. 

 structiKe as aflected by light and shade, (37) 747. 

 structure as related to position on tree, (39) 29. 

 surface Alms, effect on transpiration, (30) 726; 



(31) 825. 

 temperature, determination, (30) 223. 

 temperature, review of literature, (32) 640. 

 tissue, parasitized, studies, (27) 543. 

 variegation, transmission through grafts, (26) 



529. 

 water in Gossypium, studies, (28) 822. 

 weevil, new, in New York, (36) 859; (37) 350. 

 Leafhoppers — , 



egg parasites, (37) 460. 

 life histories, (35) 552. 

 new species, (28) 753. 

 notes, (40) 354. 

 of Maine, (33) 356. 

 of Nova Scotia, (40) 261. 

 of Tennessee, (36) 654. 

 parasites of, (39) 870; (40) 265. 

 studies, (27) 858. 

 Leafy twigs, preservation, (37) 837. 

 Learning, J. S., biographical sketch, (26) 437. 

 Least squares, methods of, (36) 419. 

 Leather- 

 adulteration, (29) 866. 

 availabOity of nitrogen in, (26) 523; (28) 725; (38) 



423. 

 beetle in Hawaii, (40) 266. 



chemistry, (40) 714. 



cuttings as cattle feed, (37) 171. 



fertilizing value, (38) 121. 

 ground, fertilizing value, (26) 323. 



home manufacture, treatise, (38) 13. 



manufacture, studies, (30) 615. 



meal, detection in dried blood, (38) 711. 



methods of analysis, (27) 205; (32) 314; (35) 316. 



nitrification of, (31) 724. 



roasted, availability of nitrogen in, (26) 725. 



studies, (29) 207. 



supply of United States, (39) 477. 



tannery sludge, fertihzing value, (28) 734. 



volumenometer, (40) 208. 



waste as source of lime, (38) 22. 



waste, fertilizing value, (29) 129; (33) 125, 327. 

 Leathers, identification, (28) 713. 

 Leavening agents, treatise, (33) 66. 

 Leaves- 

 absorption of sun energy in, (30) 45. 



aging, translocation of materials in, (32) 825. 



analyses, (35) 629. 



and seeds, dietary relationship, (37) 264. 



arsenic and manganese content, (29) 628. 



as aSected by rusts, (30) 453. 



as cause of soil deterioration, (32) 319. 



as source of potash, (34) 327. 



autumn coloration, (36) 633. 



autumn, retention of green color in, (36) 225. 

 • bacterial tubercles in, (29) 30. 

 • blackening, studies, (30) 524. 



carbohydrates in, variations, (29) 827. 



cell shape, (39) 226. 



chemical transformations in, (36) 633. 



chlorophyll quotients in, (30) 629. 



closure of, (36) 129. 



coloration of, (31) 128. 



composition and fertilizing value, (38) 722. 



composition at different periods of growth, (32) 

 128. 



dead, utiHzation, (39) 808. 



detached, respiration in, (28) 528. 



development in partial shade, (30) 522. 



dried, fertilizing value, (27) 337. 



effect on root formation and geotropic curva- 

 ture, (37; 325. 



etiolated, effect of light on, (33) 826. 



formation of anthocyanin in, (28) 36. 



green, carbohydrate content, (35) 131. 



heat production by, (28) 630.! 



incipient drying, (38) 522. 



leaching of nitrogenous and mineral matter 

 from, (29) 218; (32) 128; (35) 629. 



light relations, (27) 221. 



mineral content by day and night, (27) 630. 



morphology and evolution, (38) 729. 



movement of minerals in, (27) 229. 



movement of water in (28) 822. 



nitrite assimilation in sunlight, (40) 425. 



52831— 26t 22 



Leaves — Continued. 



nitrogen content, (28) 328. 



osmotic pressure in relation to soil moisture, (36) 



733. 

 osmotic pressure in, studies, (27) 631. 

 penetration by violet and ultraviolet rays, (31) 



129. 

 phosphoric acid and nitrogen content, (27) 731. 

 plant food constituents, (37) 629. 

 red and yellow colorations in, (30) 729. 

 relation of water content to transpiration, (27) 



331. 

 resistance to transpiration, (28) 528. 

 respiration in darkness, (26) 822. 

 respiration in, periodicity, (29) 324. 

 respiratory coefRcient, (31) 33. 

 role in soil absorption, (32) 319. 

 senile changes in, (34) 222. 

 senility in, (32) 728. 

 symbiosis with fungi, (37) 327. 

 translocation of sugars from, (26) 229. 

 transpiration as affected by sprays, (36) 454. 

 transpiration in, (28) 823; (29) 217; (31) 222. 

 transpiration in as aflected by light, (28) 529. 

 transpiring power, (36) 824. 

 variegated, anatomy of, (33) 724. 

 variegation of, (26) 529. 

 water content, (26) 627; (38) 223. 

 wet, transpiration in, (27) 222. 

 white speck disease of, (35) 650. 

 winter and summer, comparison, (37) 327. 

 xerophotic movements in, (36) 430. 

 Leben, composition, (36) 674. 

 Lecaniobius cockerelli in California, (30) 753. 

 Lecaniodiaspis rufescens, notes, (26) 149. 

 Lecanium — 



capreae, chalcid parasites, (40) 651. 

 cerasi, remedies, (33) 653. 

 cerasifex, notes, (27) 455. 

 corni, notes, (26) 555. 

 corni, studies, (37) 662. 

 hesperidum, notes. (33) 746. 

 nigrofasciatum, notes, (29) 353. 

 nigrum, notes, (28) 353. 

 oleae— see also Black scale. 



notes, (27) 357, 857; (30) 455. 

 parasite of, (26) 655. 

 persicae, notes, (36) 355, 755. 

 quercifex, notes, (29) 53. 

 quercifex, studies, (32) 553. 

 spp. in Seychelles, (30) 252; (33) 555. 

 spp., notes, (26) 556, 656. 

 tulipifera, notes, (27) 755. 

 viride, fungus disease affecting, (26) 553. 

 Lechosa fruit fly, notes, (29) 652. 

 Lecithids in cod liver oil, (33) 166 

 Lecithin — 



and allied substances, (39) 202. 

 as source of phosphoric acid. (29) 423. 

 assimilation by ruminants, (31) 71. 

 composition, (35) 201. 

 determination, (26) 709; (27) 502, 612. 

 effect on — . 



calcium and magnesium excretion, (26) 766- 

 complement-containing senuns, (31) 478- 

 growth of white mice, (35) 866. 

 hemolytic action of peptones, (35) 881. 

 emulsions, preparation and determination ol 



strength, (29) 809. 

 fatty acids of, (31) 608. 

 flocculations with acids, (27) 012. 

 food preparations from, (32) 854. 

 for pigs, (30) 571. 



hydrolysis and constitution, (2/) 804. 

 importance in animal organism, (33) 758. 

 importance in metabolism of adults, (29) 664. 

 in different tissues, (31) 577. 

 in eggs, (26) 67; (28) 313; (29) 503. 

 in horse kidneys, (30) 477. 

 loss from grass during curing, (32) ill. 

 metabolism of, (26) 159, 765; (32) 764. 

 nutritive value, (26) 565. 

 phosphoric acid in peas, (40) 508. 

 phosphoric acid, loss in, (31) 112. . 



phosphorus, determination in macaroni, etc., 



(33) 14. 

 products of soils, (32) 718. 

 purification, (30) 410. 

 role in nutrition, (27) 67. 

 synthesis, (31) 10. 



