This section is from the book "Manual Of Useful Information", by J. C Thomas. Also available from Amazon: Manual of useful Information.
Find the number of cubic inches in the piece; multiply them by .2816. The product will be in pounds.
Multiply the number of cubic inches by .2607. Copper. - Multiply the number of cubic inches by .3242. Lead. - Multiply the number of cubic inches by .41015. Brass. - Multiply the number of cubic inches by .3112.
 
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