E;:~jlanatoiy llote 



T^e sei'iea enibodis-s results of investigations, usually of 

 x'estricted 3 cope, intsnclsd to aid or cS.r3ct nanage!rient or 

 u.tili'zation pi'acoices and as guides for administrative or 

 legislative action. It is issiied in liaited quantities for the 

 c-lTioial "ose 0:1 Federal, State or cooperating agencies and in 

 processed for^i for econony and to avoid delay in publication* 



Yfeshington, D. C* 

 Febx'uaiv 1951 



