Jfo, • j ^f' l\ hnU 



Turns vr*^ (hr Jh fdh tS^ 



JtnUimi' letn/fe/'fUurr 



JftK of Th-t^rtuitmnior JT ^ ^ • * ^ 



Corrected t«mf}ft'iUu.n^ ' ' 



Air 



Tni.wl or ilrtul^n or lun^ftiH 

 SOUNDING WIRE. 



iKiWN.. 



if h ^ 



10 



50.. 



700 

 KtxJ 



i( II * I 

 1 1 < •) 



I /f>ri 

 '.)"" 



l6uO 

 1700 



10' KJ 



33CK1 

 3^00 



«>WW. I II 



