Bui. 90, Part I, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate IV. 



Fig. 1.— Supply Cart Used with the Improved System of Fumigation. 'Author's 



Illustration.i 



Fig. 2.— Supply Wagon Devised by C. E. McFadden, of Fullerton, Cal. (Original. 



