vious tubular cylindrical body with closed ends in which to mouth beneath the surface. The band is adjusted slides a piston surrounded by a spiral spring, which by sliding so as to cover the junction as evenly as pos- sible. Care must be taken to exclude all bubbles of has a bearing on a plunger at… … and is brought down below the edge, so that only half of its width surrounds the a sudden one for the most part. At 39°2° F. water at- body. The other half will now spring inward and tains its greatest density. Ifthe temperature is lowered form a horizontal diaphragm through which a large it…
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