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The Duncombe Park Steam and Vintage Rally returns to Yorkshire this year with a selection of steam engines, tractors, vintage ...
The best modern engines show, by the indicator cards, between 60 and 90 per cent of the theoretical effect of the steam ; in all cases the figures vary in proportion as care is exercised'in ...
It is clearly written; its arrangement, if not the best possible, is orderly; it is so far practical that problems arising in the actual design and use of steam-engines are not ignored, ...