Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
nce, Avith the dottedline below, the liquid, seeking a common level, will rise in one tubeand fall in the other; thus sustaining the sights on a horizontal line.The accuracy will depend upon the length of the horizontal tube. 97. Figure 5.—The spirit-level.—Tliis consists of a glass tube,FF, nearly… … the fluid will run to the lower end, and the bubble to the higher end.This instrument is chiefly employed by builders, to level their work. HYDROSTATICS. 81 98. Figure 6.—Tendency of liquids to seek a levelshown by aqueducts.—Let tlie p^ig. (i. dotted line represent a pipe convey-ing Avater over…
Physics · Astronomy
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