425 WAGNER, PH.— Destruction des sanves. 



Jour. Agr. Prat. T. I. (1898), p. 577. 



Used i_5 per cent solution of S. of I. at the rate of 600 1. per hec- 

 tare. Did not observe injury to Clover, on contrary the plants 

 took on a fresher appearance. 



426 WAGNER, P.— Wassenkultur-Versuche mit Mais. 



Landw. Vers. Sta., Bd. 13, (1870), S. 74. 



On the substitution of manganese for iron in culture solutions. 



Confirms work of Birner and Lucanus. 



427 WEHMER, ( ). — Beitrage zur Kenntniss ein heim- 



ischer Pilze. 1895, Hft. 2, S. 159. 



428 WEED, C. M. — Preventing Downy-Mildew, or Brown 



Rot of Grapes. 



Ohio Agr. Exp. Sta. Vol. Ill (1890), No. 10. 

 S. of I. treatment ineffectual. 



429 WEINZIERL, THEO. RITTER VON.— Uber die Be- 



kampfung des Ackerhederichs. 



Pub. K. K. Samen-Kontroll Stat. Wien, No. 199, (1899), S. 13. 

 Used a 15 per cent solution of S. of I. in form of a spray. The 

 S. of I. began to work inside of twenty-four hours. Cereals only 

 slightly affected, especially Barley, but recover quickly. Peas 

 and Clover are badly injured. 



430 WEISS, J. E. — Die Bekampfung des Hederichs durch 



Diingesalze. 



Wchnbl. Landw. Ver. Bayern, (1901), S. 460. 

 Some comparisons made with S. of I. 



431 WEISS, J. E.— Eine neue Hederichvertilgungs-Methode. 



Deut. Landw. Presse (1899), S. 540. 

 Jahresber. Agr. Chem., Bd. 42, S. 351. 

 Secret compound called "Heufeld." 



432 WEISS, A. & WEISNER, J.— Vorlaufige Notiz uber die 



directe Nachweisung des Eisens in den Zellen 

 der Pflanze. 



Sitzungsber. der Kais. Wiener Akad., Bd. 40, (i860). S. 276-278. 

 The first experiments to prove microscopically the presence 

 iron in the plant. Concluded that iron is contained in the form 

 of oxides both in the membrane and content of the cells. 



