39 
served in New-Jersey and Pennsylvania. Numerous quar¬ 
ries of burr stones (arid quartz of Kir wan) have been open¬ 
ed in several states. They have almost superseded the de¬ 
mand for French burrs. 
A few observations on the manufacture of glass will close 
this subject. 
This art, considered in a mineralogical point of view, is 
an extremely complex one. A union of silex and the al¬ 
kalies form the essential ingredients, Other substances 
such as salt, lime and manganese, are also used; clay of 
a good quality is required as the basis of glass house pots, 
and crucibles. These various minerals are all indispensa¬ 
ble in the establishment of a glass house. In this country, 
our works are becoming of great value for the supply of 
national wants. A few years since there was manufactured 
sufficient to meet one half of the demand, (27,000 boxes) 
and the remainder was imported.* This deficiency must 
now be supplied at home. 
In enumerating the various factories, those of our own 
state deserve the first notice. In 1810, the annual value of 
their products exceeded $ 700 , 000 . They amount as far as 
my information extends to nine; eight for the making of 
window glass, and one for the manufacture of bottles in 
Oneida county, f Of the former, two blow crown glass, and 
six, cylinder glass.f The crown glass made in this state, is 
generally considered equal to any in this country, and bids 
fair to rival, if not surpass the imported article. That made 
in Boston has a high character. At that place, retorts, and 
other articles used in chemical and pharmaceutical opera¬ 
tions are made. Flint glass in its various forms is made at 
Pittsburgh (Pennsylvania.) 
The materials used in the works in this state, are obtained 
* Gallatin, f This business will be commenced during the 
ensuing summer at the Hamilton factory in our vicinity. 
t I he crown glass factories are at Deerfield (Oneida county) 
and at Rensselaer (Rensselaer county.) The cylinder factories 
are the following: one at Geneva (Ontario county ;) one at Pe¬ 
terborough (Madison county ;) one at Oneida (Oneida county ;) 
one at Hamilton (Albany count ;) one at Rensselaer (Rensselaer 
county ;) and one at Woodstock (Ulster county.) 
