. Model engine construction, with practical instructions to artificers and amateurs. Fig. 13. tightened up, as required to suit the steam spring-balance at its lower end is pivoted toa bracket, which is soldered or screwed into theboiler. A direct-acting spring-valve (see Fig. 13) is a goodone for small models. This can be easily made fromthe instructions given, or it may be purchased, ofany suitable size, from the

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmachinery, bookyear18