PLATE 11 



.10 



MACKINAW 



579. 



HARBOR LACZf 



\ 





579.90 



580.IQ 



579.90 



7 



JLAKEMICJfl GAN-HURON 



579.90 



JUNEU9II JUN 



JUN: 21 23 



JUNE 23 JUNE! 



13 15 



~7\. 



580.00 



'MACKIATA.W 



580.00 



\ r== 



.80 



580.10 



\ 





579.90 



-.80 



LAKE MICH1 GAIV- 



MEAN 



579.90 1 



.Corrected for barometric and wind effects Observed 



Rainfall + inflow - outflow Record missing 



Elevations of water surface, Lake Michigan-Huron, June 1-July 15, 1911. 



