Sauzay, A. (Alexandre), 1804-1870 · London, S. Low, son, and Marston · leaf 280
2S6 MARVELS OF GLASS-MAKING. are only two of Galileo's glasses fastened together, and raised and lowered at will by a screw placed in the centre of the hollow tube which separates them, and which adheres to the framework on each side at the bottom.
Glass manufacture · Glassware
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
