Glass houses run day and night

INCESSANT LABOR. — Speaking of the glass works at Cincinnati, the Columbian says:

"There is no cessation of work in a glass-house. Night or day, meal time or sleeping time, the fires never cease to burn, the glass to melt or workmen to ply their skill. From the time the furnaces are heated, until some necessity for repairs imperatively demand a pause, the whole machinery, animate us well an inanimate, continues in active motion for years. Some glass works have frequently been in unceasing operation for five years; and there is one house in Pittsburg whose furnaces have never been extinguished for eight years and nine months."