Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 177
feet pitch, one of eight feet to upper manual ; and one ofeight feet pitch, and one of sixteen feet to lower manual. Hav-ing Automatic Swell; one Knee-Swell for the upper, andone for lower manual ; Self-adjusting Reed-Valves ; ImprovedBellows; Clothed Mortises. Paneled Front and Sides;Carved Antes… … . St3de No. 77-Closed. Sho7ui7ig appearance of Revolving Fai.i.-Board, when shit. See page 8.