ILLUSTRATIONS. 



PLATE. 



Page. 



Plate I. Fig. 1.— Wilder Hall, oast front. Fig. 2.— Wilder Hall, west front 630 



TEXT FIGURES. 



Fig. 1 . Apparatus for measuring the oxidation of soils 536 



2. Basement plan of Wilder Hall 631 



3. First-floor plan of Wilder Hall 632 



4. Second-floor plan of Wilder Hall 632 



xx 



