1 82 SOIL CONDITIONS AND PLANT GROWTH 



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160. Lawes, J. B., and Gilbert, J. H., " On Agricultural Chemistry," Journ. Roy. 



Agric. Soc., 1847, viii., 226-60 I2 > 37 



161. Lawes, J. B., and Gilbert, J. H., "On Agricultural Chemistry, Especially in Re- 



lation to the Mineral Theory of Baron Liebig," ibid., 1851, xii., 1-40 . . 12 



162. Lawes, J. B., and Gilbert, J. H., " On Some Points Connected with Agricultural 



Chemistry," ibid., 1855, xvi., 411-502 . 12 



163. Lawes, J. B., " Experimental Investigation into the Amount of Water given 



off by Plants during their Growth," Journ. Hort. Soc., 1850, v., 38-64 . . 28 



164. Lawes, J. B., Gilbert, J. H., and Pugh, E., " On the Source of the Nitrogen of 



Vegetation, with Special Reference to the Question whether Plants Assimilate 

 Free or Uncombined Nitrogen," Phil. Trans., 1861, cli., 431-577 (see also Phil. 

 Trans., 1889, clxxx., 1-107) 14 



165. Lawes, J. B., and Gilbert, J. H., "The Sources of the Nitrogen of our Le- 



guminous Crops," Journ. Roy. Agric. Soc., Series 3, ii., 657-702 ... 17 



166. Lawes, J. B., and Gilbert, J. H., " On the Composition of the Ash of Wheat 



Grain and Wheat Straw Grown at Rothamsted in Different Seasons and by 

 Different Manures," Trans. Chem. Soc., 1884, xlv., 305-407 .... 56 

 (Lawes and Gilbert's papers are collected in ten volumes of Rothamsted Memoirs, 

 and the general results of their experiments are summarised by Hall in The 

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167. Leather, J. W., (a) " Water Requirements of Crops in India," Part I., Memoirs 



Dept. of Agric. India, Chemical Series, 1910, i, 133-84 (No. 8) ; Part II., ibid., 



1911, i., 205-81 (No. 10) 28, 104 



(b) " Records of Drainage in India," ibid., 1912, ii., 63-140 . . . 130, 138 



168. Lebedeff, A. J., " Ueber die Bildungdes Stickoxyds bei dem durch Bac. Hartlebi 



eingeleiteten Denitrifikationsprozess," Ber. Dent. Bot. Ges., 1911, xxix, 327-29 . 100 



169. Lefevre, Jules, " Sur le developpement des plantes vertes a la lumiere, en 



1'absence complete de gaz carbonique, dans un sol artificial contenant amides," 

 Compt. Rend., 1905, clxi., 211-13 10 



170. Lemmermann, O., Fischer, H., Kappen, H., and Blanck, K., " Bakteriologisch- 



chemische Untersuchungen," Land. Jahrb., 1909, xxxviii., 339 . . . 101 



171. Lemstrom, S., Electricity in Agriculture and Horticulture, London, 1904 . . 51 



172. Lesage, Pierre, Compt. Rend., 1913, clvii., 784-787 51 



173. Liebig, Justus, Chemistry in Its Application to Agriculture and Physiology, ist 



and 2nd editions (1840 and 1841), 3rd and 4th editions (1843 and 1847) . . 10 

 (b) Familiar Letters on Chemistry, 3rd edition, 1851 ...... 12 



174. Liebig, Justus, Principles of Agricultural Chemistry with Special Reference to 



the Late Researches Made in England, 1855 I 5 



175. Liebig, Justus, Natural Laws of Husbandry, 1863 ...... 55 



176. Lipman, J. G., and Brown, Percy E., " Experiments on Ammonia and Nitrate 



Formation in Soils," Centr. Bakt. Par., Abt. II., 1910, xxvi., 590-632 . . 122 



177. Lipman, J. G. ; Brown, Percy E., and Owen, Irving L., " The Availability of 



Nitrogenous Materials as Measured by Ammonification," Centr. Bakt. Par., 

 Abt. II., 1912, xxxi., 49-85. (See also New Jersey Agric. Expt. Stat. Repts.) 122 



178. Livingstone, Burton Edward, The Relation of Desert Plants to Soil Moisture 



and Evaporation, Carnegie Institution of Washington, No. 50, 1906 . . 28 

 " The Relation of the Osmotic Pressure of the Cell Sap in Plants to Arid 

 Habitats," Plant World, 1911, xvi. 153-164 28 



179. Livingstone, Burton Edward, Jensen, Breazeale, Pember, and Skinner, " Further 



Studies on the Properties of Unproductive Soils," C7.S. Dept. of Agric. 

 Bureau of Soils, Bull. 36, 1907 115 



180. Loew, Oscar, " Ueber die physiologischen Functionen der Calcium und Mag- 



nesium salze im Pflanzenorganisms," Flora, 1892, Ixxv., 368-94 (A complete 

 list of Loew's papers on this subject is given in Munch, med. Woch, 1910, 

 No. 49) 46 



181. Loew, Oscar, " The Physiological Role of Mineral Nutrients," Bull. 18, Div. 



Veg. Phys. and Path. U.S. Dept. Agric., 1899 40 



182. Loew, Oscar, Flora, 1911, cii., 96-112 45 



183. Loew, Oscar, " On the Treatment of Crops by Stimulating Compounds," Bull. 



Coll. Agric., Tokyo, 1904, vi., No. 2, 161-75 ....... 46 



