has an ordinary D valve. We illustrate one of Blake’s compound high and low OF WEIGHTS AND MEASURES. is shown néarly at the end of its stroke toward the right, is pressure steam pumps, manufactured by Messrs. 8. Owens prevented from striking the covers by the use of supple- As a consequence of an… … PR yt oie for the purpose of internationalizing the metric system, and , the remainder of the steam is confined and a cushion of taking in charge thef ollowing business: luced. (1) Comparisons and verifications of the new prototypes he pump is provided with an independent air pump and of. the meter…
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