244 ANNUAL REPORT 
For conditions at Columbus, these figures could not be substantiated. — 
Assuming it possible to make 40 blocks a day, labor at $2.00 per day. 
Waboricper: Plo eee Roe eet eae Ie PSOE) 
Cement, 40 stone to the barrel, at $2.00............ .05 . 
1% yds. gravel and sand at $1.60 per cu. yd........ .06 
Costs Der DIO CK ee rs ie heed 2 coat eniiea crs hen atau Pome (VENT IG 
To this must be added the interest and depreciation on the cost of 
the plant. ag Se 
Fig. 149.—Dykema Block, Granite Finished. 
