26 SCIENCE BULLETIN, No. 9. 



Action of Iodine on growth of plants. S. SUZUKI. (Bull. Coll. Agric. Tokyo 

 Imper. Univers., 1902, 5, 199-201.) KI at the rate of 0,006 gram in 2 to 3 

 kilos of soil increased the growth of peas, both as regards straw and seed. 



Stimulants of plant .growth, their practical employment. OSCAR LOEW. 

 (Landw. Jahrb., 1903, 32, 437.) . . . (See Mn.) . . Small amounts 

 of KI had good effect. 



Stimulating action of KI on sesamum and spinach. S. UCHIYAMA. (Bull. 

 Imper. Centr. Agric. Exper. Station, Japan, 1900, 1, 35-37.) Small amounts 

 of KI increased yield both of sesamum and spinach. In pot experiments 

 with sesamum there was an increase of 10 per cent, when KI was added, 

 at the rate of 124 grammes per hectare, and 25 per cent, when ten times 

 that quantity. In a field experiment on a plot having an area of 59-5 square 

 metres, the yield was increased 24 per cent, by 25 grammes of KI. The 

 results are interesting, as it is usual along the coast to employ seaweed as a 

 manure. 



Influence of stimulating compounds on crops. S. UCHIYAMA. (Bull. Imp. Centr. 

 Agric. Exper. Stat, Japan, 1907, 1, 37-79.) KI increased the yield of 

 Panicum miliaceum by 28 per cent., and barley by 34 per cent., the most 

 suitable amount being 376 and 500 grammes per hectare respectively. 



Function of Iodine in marine Algae. FRANCESCO SCURTI. (Gazzetta, 1906, 36, 

 ii, 619-625.) The Author experimented on Sargassum linifolium', he 

 concludes that Iodine holds in algse the place that Cl holds in phane- 

 rogams. 



Lithium. 



Behaviour of plants toward Lithium salts. GIRO RAVENNA and M. ZAMORANI. 

 (Atti. R. Accad. Lmcei., 1909 (v), 18, ii, 626-630. Finding that the 

 ash of tobacco leaves contains sufficient Li to impart a marked colouration 

 to a flame, the Authors have investigated the effect of Li 2 SO 4 on various 

 plants. On tobacco and potatoes no toxic action was observed, but some 

 on oats, and more marked on beans. 



Action of Lithium and Caesium on vegetation. M. KATAMURA. (Bull. Coil. 

 Agric. Tokyo, 1904, 6, 153-157.) Li 2 CO, has a slightly stimulating effect 

 on barley and peas. 



Influence of salts of Lithium and Ca?siuni on wheat. J. A. YOELCKER. ( J. Roy. 

 Agr. Soc. Eng., 71, 344-5.) 



Csium. 



Csesium as a manure. M. KATAMURA. (See above re Lithium.) CsCl, at the 

 rate of 0-1 gram per kilo of soil, slightly increased the yield of rice. 



Uranium. 



Stimulants of plant growth. OSCAR LOEW. (Bull. Agric. Imper. Univ. Tokyo, 

 1902, 5, 173-175.) Solutions of 0-01 per cent. Uran. nitrate increased the 

 yield of peas and oats ; solutions of 0-2 per cent, were fatal in three days. 



Stimulants of plant growth, and their practical employment. OSCAR LOEW. 

 (Landw. Jahrb., 1003, 32, 437.) Uranyl nitrate increased the yield both of 

 oats and peas. 



Titanium. 



Presence of Ti in plant ash. CHARLES E. WAIT. (J. Amer. Chemic. Soc., 1S96, 

 18, 402-404.) Titanium occurs in every plant ash that the Author has 

 examined. . . . Ash from coal contains Ti, Pennsylvania anthracite 

 coal as much as 2 59 per cent. According to Author, Oakwood ash contains 

 31, cow pea ash 001, apple and pear wood ash 021. Cotton seed meal 

 has 002 of Ti. 



Nature of the colour of the black cotton soil of India. H. E. ANNETT. (Mem. 

 Dept. Agric., India, 1910, 1, 185-203.) The dark colour is due to a mineral 

 containing 18-07 per cent, of TiO, 



