142 
GEOLOGY OF THE FIRST DISTRICT. 
plied from localities long used. This sand is composed of fine grains of quartz, feldspar, 
garnet, hornblende and magnetic oxide of iron. 
The following tables show about the number of bricks made annually between the years 
1836 and 1841, in the different counties, towns, and yards as specified. Where the yards 
or persons are not specified, the number opposite is set down as the estimated number, not 
that obtained from the yards. 
Brick Manufacture of the Hudson Valley. 
County. 
Schenectady, 
Albany,. 
Rensselaer,.. 
Saratoga,.... 
Washington, 
Greene,. 
Ulster. 
Schoharie, .. 
Year. 
Number made 
aggregate. 
Schenectady,. 
Albany,. 
Coeymans,. 
Lansingburgh,. 
Troy,. 
Greenbush,. 
Castleton,. 
Schodack, . 
Waterford and sundry others, 
Whitehall and sundry others, 
Coxsackie,. 
Athens,. 
Catskill,. 
Sundry places,. 
do do . 
Phillipstown, foot of Break- 
Phillipstown, foot of Bull 
Hill,. 
Sundry persons, 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
do do 
l,000,00O 
10,000,000 
2,000,000 
1,000,000 
6,000,000 
500,000 
1,000,000 
1,000,000 
1,000,000 
1,000,000 
5 , 000,000 
8,000,000 
5 , 000,000 
2 , 500,000 
500,000 
2,000,000 
1,200,000 
1,000,000 
12,000,000 
9 , 500,000 
1,000,000 
1,000,000 
18 , 000,000 
2 , 500,000 
500,000 
Grand 
■aggregate. 
