RICHARDS & CALEB JOHNSON.
PHILADELPHIA,
PUBLISHED MONTHLY BY
RICHARDS & CALEB JOHNSON,
No. 31, Market Street,
At $3.00 per annum.
Griggs & Dickenson, Printers—Whitehall.
FOOTNOTES:
[1] The pose is 40,000 square feet of Berne, equal to 32,500 of Paris, and about 35,000 English feet, that is, equal to about 4⁄5ths of an English acre.
[2] See Davy's Elements.