t regis- Beet, have been adopted, ters the variations in baro- such as sulphide of carbon metric pressure is seen in the combined with water and A. Clockwork running eight months. B. Registering system of the barometer. C. Barometer. E. Pen of the ther- center of the engraving (Fig. E’. Reservoir… … time preserving the register- and the lime exposed to air ing in the interior. will quickly become carbon- REGISTERING ANEMOMETER. ated. The beetles would then The registering of the ve- find no hindrance to the de- locity and direction of the struction of a crop of beets wind is done upon the same…
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