keeping with the other house board having bought the patent.—Marine Re- of heat on the one side causes a variation in the pres- instruments in what is to be the finest national observa- view. sure of the fluid or vapor in the chambers, and this, tory in the world. by upsetting the equilibrium of… … base of the triangle. Mark the 12 parts, and then ap- characteristic. Yet of the 255 fog signals of various kinds in the United States, not including whistling and ply it to the drawing, using it as a scale. ate to the difference between the heat applied and the bell buoys, but 18 sirens are nowin…
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