{ SINGLE COPIES SIX CENTS. Vol. X.===No. 13. $3 PER ANNUM—IN ADVANCE. (NEW SERIES.) MOLE tA Nh | Tt \ puny a res AAR. ‘G = — o\ ei = =| anh i Me = On page 212, Vol. LX. (new series), This valve and face is shown in Fig. of the SctENTIFIC AMERICAN, we pub- 3, while the piston and its crank shaft…
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