al of this matri.al wa published in ILepolL's 
ftrGas 3urvey f the Northb 1Untral 6tates. AU negat 
ntmrked' "    e#" (apr      100] we   destroe   Lu. 
t* he fire lasarL of Nfitrate fibs. Thi was clone at 
oosutation vuit Prof. Mocabe of the Dept. of Gamse 
Naagemsnt.