man- .* I « > ^ simple fact that, in the same rod, the elongations or con- ner, if the liquid is too strong and lime is used, it has a ten- DOUBLE STEAM HASUEB. tractions are proportional to the stresses undergone. And, dency 10 crystallize and become hard. There are some ob- Messrs. B. and S.… … face, and that against it; th^e presses, under the influence DOUBLE STE&U HAKKER. of a spring, a small sphere carried by a lever jointed to a Ordnance for Harbor Defense. fixed axis. This part is unfortunately hidden by the appa- designed double steam hammer. There are, as shown, two ratus (Fig.…
