5 50] 



♦ ILLINOIS STATE I 



| LABORATORY | 



| OF NATURAL HISTORY 1 



LIBRARY I 



X I E> RAFLY 



OF THE 



UN I VLR.SITY 



Of ILLINOIS 



yA^UR Air- HISTORY SURVEY 



550.5 



FI 

 v.5.cop.CL 



REMOTE STgMii 



