W. and J. H. Johnson
1856 Exhibited drawings of important inventions, including Chamberlain's Brick Tube and Tile Machine; Mr. M'Connell's improved Locomotive; Wilson's Balanced Valve Steam Hammer; a some of several lathes, shaping and shearing machines by Sharp, Stewart, and Co.; also a drawing of the Bowling Iron Company's Steam-hammer.
1858 Exhibited a drawing of the retorts invented by Mr. W. Bragge, and used in the Buenos Ayres Gas Works, fitted up by E. T. Belhouse and Co., Manchester.