225 LOUIS, THEODORE.— Corrective for Swine. 



Farm, Stock and Home, July 15, 1894. 



"Take 6 bushels of this cob charcoal, or 3 bushels of common 

 charcoal ; 8 pounds of salt ; 2 quarts of air-slacked lime ; 1 bushel 

 of wood ashes. Break the charcoal well down with shovel or 

 other implement, and thoroughly mix. Then take 1% pounds of 

 copperas and dissolve in hot water, and with an ordinary water- 

 ing pot sprinkle over the whole mass and then again mix thor- 

 oughly. Put this mixture into the self-feeding boxes, and place 

 them where hogs of all ages can eat of their contents at pleasure." 



226 LUDECKE, ( ).— (Hederichvertilgung). 



Zetschr. Landw. Kammer Schlesien, (1898), S. 721. 



227 LUDECKE, ( ). — Ein neue Methode zur Vertilgung des 



Hederichs. 



Ztschr. Landw. Kammer Schlesien, (1897), S. 745. 



Jahresber. Agr. Chem., Bd. 40, S. 406. 



A 10 per cent solution S. of I. kills Charlock and does not injure 



Oats and Clover. 



228 LUDECKE-MAINZ, ( ).— Uber die Verwendung von 



Eisenvitriol als Heilmittel der Gelbsucht der 

 Weinstocke. 



Landw. Ver. Ztschr. f( Hessen, (1893), 7 u. 8. 



The richer the soil in lime the more S. of I. may be used with- 

 out injury. The products of the reaction between the lime and 

 S. of I. (ferric oxide, calcium sulphate and carbonic acid,) 

 have a beneficial effect on plant growth. 



229 MACALLUM, ( ). — On the Demonstration of the pres- 



ence of Iron in Chromatin by Microchemical 

 Methods. 



Proc. Roy. Soc, (London), Vol. 50, (1892), pp. 277-286. 

 Bot. Centbl., Bd. 55, (1893), S. 138. 



230 MAECKER, M.— ( ). 



Ztschr. des landw. Centralvereins f. d. Provinz Sachsen, (1874), 

 Nos. 2, 3, S. 70. 



In work on moor soils it was shown that the presence of Sulphate 



of Iron means the absence of nitric acid. 



One hundred parts of dry soil contain, 



Nitric acid. Soluble Iron. 



0.0956 0.0 



0.0 1.349 



0.0088 0.298 



