the finest quality, any more than a farmer than can grow wheat to the exclusion of every other produce; and whoever makes that attempt, will, in the end, find out his error. A ten-pot furnace, filling nine pots weekly, besides overtakers occasionally, (the tenth being an empty pot for the castor-hole workman,) may employ five chairs of workmen, changing alternately every six hours, day and night; there being five chairs at work, and five chairs at rest.

The four-chair system is, however, the mode usually adopted—viz., the first is termed the castor-hole chair, consisting of workman, servitor, footmaker, and boy, for making large goods, such as carboys, and large show-rounds for the chemists' windows, milk pans, handled quart and pint jugs, decanters, semicircles, for roughened lamp shades, &c. Tall or muscular men are employed in this department; as occasionally, goods of thirty or forty pounds weight of Glass will require great power to work into form, the leverage of the blowing iron giving additional weight to the article under manufacture. An empty pot, heated with dried beech-wood, is used by the workman at the castor-hole for re-heating the Glass.

The second chair consists of a workman, servitor, footmaker, and boy, for making fancy articles, and goods required for cutting—viz., toilet and smelling bottles; also tube-drawing in all its operations, for barometer, thermometer, and steam gauges, as well as chemical apparatus of small size, &c. The Glass for these purposes is re-heated at the mouth of one of the pots containing fluid Glass.

The third chair, consisting of workman, servitor, footmaker, and boy—is almost entirely occupied in making