First edition. Folding diagramatic frontispiece and one other similar plate. 8vo. 24pp. [Bound with:] A Letter to the Editor of the Practical Mechanic and Engineer’s Magazine. In Reply to his Review… 16pp. Light browning, otherwise very good in half dark blue morocco on blue linen boards, a little rubbed at the extremities, t.e.g. London, George Herbert, 1847.
Uncommon, four copies only of the first named on COPAC, Cambridge, Manchester, BL and NLS. OCLC adds three further at Cornell, Brown and LoC.