U. S. B. F.— Doc. 890. 



Plate XXIX. 



FIG. 1.— KILN FOR BURNING OYSTER SHELLS TO MAKE LIME, SHOWING 

 SHELL HEAP IN BACKGROUND AND PILE OF LIME IN FOREGROUND. 



(Photo from Prof. E. N. Cory, Maryland State University.) 



FIG. 2.— LOADING OYSTER SHELLS INTO CAR FOR USE IN BUILDING ROADS. 



