9. Mean monthly rainfall, Spetember. Photo. Lith. by Hoen & Co. Baltimore, MD. (on lower margin) S Ex 91- 50... 1. (to accompany) Charts and Tables of Rain-Fall On The Pacific Slope, With A Discussion of The Causes of The Wet and Dry Seasons, The Abundance and Deficiency in Different Portions, The Summer Rainy Season in Arizona, Etc. By W.A.Glassford ... Washington: Government Printing Office. 1888.