In his entry for Tromba, Wedgwood writes: Included in his MS. collection of scales, the author finds the following particulars of a Pedal Tromba (flue), 16 ft., made by [Edmund] Schulze. Wood pipes of inverted conical shape: - CCC pipe, 16 ft. long, and 5 in. x 5 in.; top of pipe, 7 1/2 in. x 7 1/2 in. Made of 3/4 in. �stuff� planed to 1/2 in. at top. Pipes slotted, and fitted with roller, and bevelled cap; mouth cup up 1/3.