:l.1 PENNSYLVANIA. 293 
Portland cement production of the Lehigh district, 1890-1902. 
Year. 
Lehigh district. 
Entire United States. 
Percentage of 
total prod 
Number 
of plants. 
Number of 
barrels. 
Number 
of plants. 
Number of 
barrels. 
Value 
net manufac 
tured in Le- 
high district, 
890 
.5 
5 
5 
5 
7 
8 
8 
8 
9 
11 
15 
16 
17 
17 
201,000 
248, 500 
280, 840 
265, 317 
485, 329 
634, 276 
1,048,154 
2, 002, 059 
2, 674, 304 
4, 110, 132 
6, 153, 629 
8, 595, 340 
10, 829, 922 
11, 400, 000 
16 
17 
16 
19 
24 
22 
26 
29 
31 
36 
50 
56 
65 
68 
335, 500 
454, 813 
547, 440 
590, 652 
798, 757 
990, 324 
1, 543, 023 
2, 677, 775 
3, 692, 284 
5, 652, 266 
8, 482, 020 
12,711,225 
17, 230, 644 
19, 000, 000 
$439, 050 
1,067,425) 
1,152,600 
1,158,138 
1,383,473 
1,586,830 
2,424,011 
4, 315, 891 
5, 970, 773 
8, 074, 371 
9, 280, 525 
12, 532, 360 
20, 864, 078 
60. 
891 
.892 
893 
54.7 
51. 3 
44 9 
894 
895 
60.8 
64 
896 
68.1 
.897 
898 
899 
74.8 
72.4 
72.7 
900 ;.... 
901 
902 
903 a 
72.6 
67.7 
62.8 
60.0 
" Estimated. 
FUTURE EXTENSIONS. 
As noted in the earlier portion of this paper, the cement deposits 
lave been developed only from near Reading, Pa., to a point a few 
nilesfrom Stewartsville, N. J. Most of the readily accessible cement 
and between these points has been taken up by the cement companies 
>r is being held at impossible prices by the owners. Under these cir- 
cumstances it seems probable that few additional plants can be prolit- 
ibly established in the district now developed, and that the growth of 
;he industry here will be brought about by extending the district. A 
! ew notes on the distribution of the same cement beds in adjoining 
ireas may therefore be of interest to those desiring to engage in the 
Manufacture of Portland cement from materials of the Lehigh district 
ype. 
Northeast of Stewartsville, N. J., the cement beds outcrop at fre- 
quent intervals in the Kittatinny Valley all the way across New Jersey, 
md a few miles into Orange County, N. Y. The exact locations of these 
leposits, with numerous analyses of the cement rocks, are given in 
the Annual Report of the State Geologist of New Jersey for 1900, 
pages 41-95. Many detailed maps in that report show the outcrops 
rery precisely. 
Southwest of Reading the Trenton beds outcrop in a belt that 
crosses Lebanon, Cumberland, and Franklin counties, Pa., passing 
