STATE GEOLOGIST. 
TABLE No. 20—Concluded. 
123 
a Ke 
g 
q ag 2 2 % 
® s a a) 
£ 8 a BE 5 
fal 4 S) Ay S) ae 
1908 Chicago, Ills........ Sidewalks......... 1-2 -5 |12.50 | Approx. 
1899 |Columbus, Ohio... ... WO a scncecoaca: 1-214-5 | 5.75 eee 
1889  |Columbus, Ohio........ Dae es Crees eiee Avobr ek cee ot 
1900 Chicago, Ils............ CLG, ie, iI 25lAl ie | es 2 
1902 Chicago, Ills........... [L. 8. &@M.S. Ry..|1-8 -6 [96.25 | Retaining 
, Lining of 
1903 Peekskill, N. Y......... munnele: 1-2 -4 |10.72 Ry.Tunnel. 
1903 Columbus, Ohio........ Road Foundation.|/1-4 -8 | 4.35 
1904 Columbus, Ohio........|Curb and Gutter. .|......... 17.00 | Approx. 
TABLE No. 21. 
Cost of Concrete—Using Natural Cement. 
- ; : 
gl 4 8 my iS io 
cS) SE & 3.2 a 
$ 2 Be 3 |e 5 
5 g E cee lece 2 
1895 Marquette, Mich........|Breakwater ......|......... 3.64 |\ 
1894 ING WarOl kiran mas ig | TAT DORs 2 chats wis tasers comeienct. 3.55 
Governm’t 
1897 Rough River, Ky....... River Impr’v’m’nt}......... 7.50 |\ River and 
Harbor 
Herr’s Island, : yates Work. 
1897 Allegheny River River Lmipray, man ee sere te: 3.59 
1897 Monongahela River.....|River Impr’v’mn’t}......... 8.00 | 
i Including 
1900 Chicagonplllste senene ine C.& N. W. By / 
Track Elevation|!~? ~872) °-40 Bo 
: oundation 
1902 Chicacowslllsianm ea. L.8.&M.S. Ry../1-2 -4 | 4.00 of Wall. 
The cost of massive concrete can be materially reduced in price if 
large irregular boulders or stones are imbedded in the concrete. It is possi- 
ble to do this without in any way weakening the mass. 
$6.00 per cubic yard and stone costing $1.00 per cubic yard was imbedded 
in the concrete to the extent of say 40 per cent. of the mass, then one 
cubic yard of masonry would cost $4.00, a saving of one-third the cost of 
the original concrete. 
I£ concrete cost 
