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Mr Foster's return on Roper's Engine etc Is opposed to the whole trumpet system The trumpet he thinks gives more sound [[near?]] by but cannot be heard as far It affects the ear when near but can be heard at a less distance in foggy weather - not so penetrating Thinks the engine may be improved so as not to be so liable to get out of order under the change of ordinary [[end page]] [[start page]] [[page number in pencil]] 7 Roper thinks it will break down with ordinary usage Packing of leather requires frequent renewall unless constantly oiled It requires four times as much oil [[insertion]] as [[/insertion]] any [[strikethrough]] other [[/strikethrough]] engine driven by steam The faster an engine goes in any of its parts the greater the quantity of oil required The valves are liable to be burned out by a little over heating great care required on this account Valves very difficult to replace A Fog signal like in