Elements of natural philosophy (Volume 2-3) (1850)
Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 54
elongated or drawn out in the direction along wave front not which the elastic force is greatest and density least, and conversely. Like effects will arise when the elasticity and density both increase or decrease, but unequally. § 42. Thus, conceive a solidwhose density, estimated in thedirection… … Illustration; D = j) (i + o . cos 4>), /I K\ Intermediate density; in which D denotes the density in any intermediatedirection as A D, and 0 the angle which that directionmakes with that of greatest density or with A B. Also,let the elastic force in the direction A 0 be E., and thatin the…
Mechanics · Acoustics · Optics
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