30 SCIENCE BULLETIN, No. 9. 



JOHN A. VOELCKEK. (J. Roy. Agric. Soc. England, 1010, 71, 343-350.) Small 

 amount of Li (Li 0-0018 per cent.) seems to have a stimulating effect on 

 wheat, no injury if under 0-002 per cent. Cs salts may be employed up to 

 0-0036 per cent, without injury. Zn salts are injurious when soil has 0-04 

 per cent. zinc. Barley showed better result with FeSO 4 (002 per cent.), 

 v and MnSO 4 (0-005 to 0-08 per cent.) similar effects with soil. 



P. LEIDRETER. (Inaug. Diss. Ilostock. Bied. Zent, 1911, 40, 531-535.) Man- 

 ganese gave good results with oats, beans, mustard, sugar-beet, mangold. 



A. CABLIER. (Ann. Gembloux, 1910, 423.) MnSO 4 applied at the rate of 50 

 and 100 kilos per hectare increased yield of hay up to 09 and 9-5 per cent. ; 

 it reduced yield of potatoes by 9 and 0-6 per cent. ; it reduced yield of man- 

 golds (roots) by 2-5 and 1 per cent; it reduced yield of leaf of mangolds 

 by 2-5 and 20 per cent. 



L. BERNARDINI. (Staz. Speriin, Agr. Ital., 1910, 43, 217-240.) The chief effect 

 of Mn is the production of Ca and Mg soluble compounds from insoluble 

 forms, so that Mn may be considered as an indirect Ca and Mg manure. 



J. STOCKLASAI. (Compt. Rend., 1911, 152, 1340-1342.) The author confirms 

 Bertrand's experiment on the beneficial effect of Mn on plant development. 

 Nutrient solution containing 1-1,000 of the gram atomic weight of Mn and 

 Al per litre increased the yield of the plant, but if both are present a toxic 

 effect follows. The best results are obtained from solutions containing 

 half the above quantities. 



THEODORE PFKIFFER and E. BLANCK. (Landw. Versuchs Stat, 1912, 77, 33-66.) 

 Experiments in pots and small pots are described. . . . Conclusion: 

 under some conditions Mn salts may have favourable effect on plant de- 

 velopment ; it is, however, doubted whether the action of Mn is of practical 

 importance, and more evidence is required before its employment can be 

 recommended. ) 



H. BABTMANN. (Journ. Agr. prat., 20, pp. 666-7.) The yield of potatoes and 

 sugar-beet was greatly increased by Mn salts. The greatest yield was 

 obtained from using 176 to 352 Ib. to the acre. 



LUIGI MONTEMARTINI. ( Pavia Bot. Instituto. from Staz. Sper. Agr. Ital., 44, 

 564-571.) Experiments show that MnSO 4 as well as CuSO 4 in very dilute 

 solutions exert a strong s'dmulatiug action. 



A. and P. ANDOTJARD. (Engrais, 2G, 915-G.) The Authors experimented with 

 wheat, potatoes, carrots, and kidney beans. Mn increased the yield of 

 wheat and beans, but slightly decreased the yield of carrots and potatoes. 



Y. FUKUTOME. (Bull. Coll. Agr. Tokyo, 1004, 6, 126-130.) The joint applica- 

 tion of Iron and Manganese had a distinct effect in increasing the yield of 

 flax; separately they had less effect. Cobalt nitrate (002 gram in 8 kilos 

 of soil) had also a stimulating effect. 



(<) Influence of Manganese on Alcoholic Fermentation. 



E. KAYSER and H. MARCHAND. (Compt. Rend., 1007, 145, 343-346.) More com- 

 plete fermentation is obtained by using yeasts accustomed to the presence 

 of Mn. 



E. KAYSER and H. MARCHAND.. (Compt. Rend., 1007, 144, 714-71G.) Mn has a 

 beneficial effect. 



E. KAYSER. (Compt. Rend., 1910, 151, 816-817.) MnNO., is more active than 



KNO 3 in alcoholic fermentation. 



d] Manganese as a Toxic Agent. 



W. P. KELLEY. (Journ. Ind. Eng. Chem., Vol. I, p. 533.) The Author finds 

 Mn in Hawaiian soils which are toxic to pine-apple. 



F. B. GUTHRIE and L. COHEN. (Journ. Roy. Soc. N.S.W., Vol. 43, p. 354-60.) 



Two samples of the same soil, one in normal condition, and the other from 



patches where grass would not grow, analysed, showed the presence in the 



second one of 254 per cent, of Mn,O 3 , which was quite absent in the first. 



The Authors attribute the sickness of the soil to the Mu present. 



W. P. KELLEY. (Hawaii Agr. Exp. Stat. Bull., No. 26.) A long and interesting 



work on the action of Mn on Hawaii vegetation. The Author has found 



that some plants are affected by Mn and some not. In practically every 



\ instance a modification of the mineral balance in the ash was observed. 



