Directions for performing the metallic operation with Perkins's patent tractors
Series: Eighteenth century -- reel 4923, no. 02.
Published: 1798
Place of publication: [London
Language: eng
Format: Microform
Notes: Receipt at foot, dated "No. 18, Leicester Square, London, [blank] 179[blank]", was to be completed in manuscript and to be signed by the patentee, Benjamin Douglas Perkins.

Microfilm. Woodbridge, CT Research Publications, Inc., 1991. 1 reel ; 35mm. (The Eighteenth Century ; reel 4923, no. 02).