Note 203 — MIRRORS135.
William Johnston translation
A furnace for casting large glass plates, before it is fit to be set at work, cost, it is said, 3500l. It seldom lasts above three years, and even in that time it must be repaired every six months. It takes six months to rebuild it, and three months to repair it. The melting-pots are as big as large hogsheads, and contain above 200 cwt. of metal. If one of them burst in the furnace, the loss of the matter and time amounts to 250l.—Trans.