Revision history of "Edited by Albert A. Hopkins. Prev. pub. as The Standard American encyclopedia of formulas. Partly based on the 28th ed. of Scientific American Cyclopedia of receipts, notes, and queries" (Q7554)

Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.