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Explanation of Plate II.

I N this plate are strewn different combinations of thepots for different uses, with and without the iron hoopbetween them. In the back part of the upper pot ordome is expressed the round hole, through which, and theopposite ash-pit door, an iron rod is passed for conveni-ently lifting it off when hot.

On the right hand is the wind melting furnace (page 11)with a section of the grate and crucible. It stands upon aportion of another pot, in the sides of which three archesare sawed (page 6).

In the middle is the assay furnace (page 12) with asection of the muffle above the grate. This furnace standsupon another entire pot inverted, that it may be raised toa proper height for the inspection of the cupels, &c. underthe muffle.

On the left hand is a reverberatory, with a coatedglass retort for distillation. It stands on the same kind offoot as the wind furnace on the right side; and in its backpart is shewn one of the two bars on which the bottomof the retort is supported.

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