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XXXVIII.-TABLE,

Shewing the Weight of One Foot in length of Square Iron Bar.

XXXIX. TABLE,

Shewing the Weight of One Foot in Length of Round Iron Bar.

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XL.--A TABLE,

Shewing the Weight of One Foot of Flat Bar Iron, from one inch broad and one-eighth of an inch thick, to four inches broad and one inch thick, close hammered.

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XLI. A TABLE,

Shewing the Weight per Foot superficial of Lead, from one sixteenth of an inch thick to one inch thick.

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XLII.-A TABLE,

Shewing the weight of a superficial foot of cast iron, from to 2 inches thick.

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XLIII.-A TABLE,

Shewing how many feet superficial a hundred-weight of Sheet. Lead will cover, on a flat roof, or gutter, &c., from 4 ib. to 12 lb. weight per foot; the value of each superficial foot, or square, according to the several weights; viz. at 2ąd. per lb. or 11. 5s. per cwt. for all under 7 lb. per foot superficial: and 2 d. per lb. or 11. 3s. per cwt. for 7 lb. per foot superficial, and all above, including labour, solder, &c.

[blocks in formation]

N.B. By the above Table, any quantity of covering may be easily estimated according to the thickness of the lead

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