THE STEAM DRILL 



63 



at $3.50 per day), and if we allow something for the value of 

 the stone reserved by the college, the actual net outlay will re- 

 main nearly $500, as given above. 



Of the total fill, one third was for sidewalk, two thirds for 

 roadway. Of the rock excavation, two thirds was for sidewalk, 

 and one third for roadway. On the whole, 56 percent, of cost 

 was for roadway, and 44 per cent, for sidewalk. 



The cost of moving clay, hard pan, and strippings varied 

 from 25 to 40 cents per yard, differing mainly with the kind of 

 labor employed in shoveling. 



RESUME 



827 yards earth, estimated to shrink in place 1-10 

 lo .«••••••• 



258 yards stone, less 20 yards drawn to college 

 barn, equals 238 yards, estimated to increase in 

 place 1-6, to 



Wall stone in place ..... 



Fills according to above estimates 

 Fills from rough, direct measurements 



Average ...... 



1,135 y al "ds at 64 cents (average price) 

 $727.57 plus $17.32 (expense of culverts) . 



744 yards. 



275 yards. 

 130 yards. 



1 ,149 yards. 

 1,120 yards. 



1,135 yards. 



$7 2 7-57 

 $744.89 



THE STEAM DRILL 



Steam drills are in common use in cities for grading and 

 sewer excavation, quarrying stone for crushing, etc. They 

 have not hitherto been considered as necessary or even desir- 

 able machines for smaller towns. With reference to them, the 

 object of this experiment was (1) to determine whether they 

 are adapted to work carried on by more or less inexperienced 

 hands; (2) to see if the use of the drill as a portable machine 

 for small amounts of work in a place is practically feasible. 



While the work done was all within a limited area of a few 

 hundred square feet, the arrangements were on a portable 

 basis, and as a matter of fact, the whole apparatus was moved 

 several times so satisfactorily as to amply justify more frequent 



