Humphrys, Tennant and Dykes
…engine rated at 160 nhp. At the 1862 International Exhibition Humphrys, Tennant and Dykes showed details of the 4-cylinder expansion engines for the Peninsular & Oriental Steam Navigation Company's ship Mooltan. The cylinders were steam jacketed and arranged in pairs using the Woolf compound system, with each of the smaller 43-inch (109 cm) diameter…