These were early Albany's glaziers.
A number of early Albany people owned and used a "looking glass" to help them read and see better.
After the War for Independence, a "Glass House" or glass factory for the making of bottles (1789) and then window glass (1792) was established west of Albany at Hamilton (now Guilderland). In 1813,it was said ot be producing 500,000 feet of window glass annually.
Sources: Links to websites about early American glassworkers:
privately posted: 3/1/08