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[[image - pencil drawing of a steam whistle]] [[image - pencil drawing of interior workings of steam whistle marked with the words 'toothed wheel']] 2feet 5in in diameter [[end page]] [[start page]] [[page number in pencil]] 35 The working of the pump by the shape affects the sound of the whistle the engineer thinks an injector would be better The diameter of the [[whistle?]] is 5 inches The height of the bell is 9 inches The width of opening 11/10 of an inch but not concentric but upright The whistle ought to be opened and shut more suddenly