542 



OHIO EXPERIMENT STATION: BULLETIN 345 



Date of first killing frost in autumn, 1919 



i! HwK i M.?ffi.*s!r< l i e t.',to''' r-fr: 



>j OEF.ANCe 'HENRY! WOOD ' ij^JJfc I- j [T&S 



r- | W(* \. IMAHW,., 



r ^TH\ \-dv/j rsSv? 



iA'oy^'l "* WAYNt | STARK j COLUIIA 

 fJS LANON if |fo*/gj f^- ^/ 



7 j RICHLANO i I I /c 



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i l~ 



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Fig. 61. These dates are self-explanatory, and show the local variations 

 of frost formation with latitude and topography in the autumn of 1919. 



