. Transactions. the same meaning as on p. 664. The 4000 3000 h2000 be 1000 t/5 cZ2 O I I ! i I I ] i I ^ j - _iu ^^ __ ==ir !:===^ i ,26° 32 50 65 7075 800 1600 Fig. 100 200 400 Packing Pressure in kg per cir cm 16.—Transformation of logarithmic curves of Fig. 15 by plotting .ab-scissas PROPORTIONAL TO LOGARITHMS OF PACKING PRESSURES. plotted points, each of which represents an individual crush (not anaverage of several tests), were located after applying small correctionsto reduce the observations to what the\ would have been if the tempera-tures at the time of crushing had been exactly those
. Transactions. the same meaning as on p. 664. The 4000 3000 h2000 be 1000 t/5 cZ2 O I I ! i I I ] i I ^ j - _iu ^^ __ ==ir !:===^ i ,26° 32 50 65 7075 800 1600 Fig. 100 200 400 Packing Pressure in kg per cir cm 16.—Transformation of logarithmic curves of Fig. 15 by plotting .ab-scissas PROPORTIONAL TO LOGARITHMS OF PACKING PRESSURES. plotted points, each of which represents an individual crush (not anaverage of several tests), were located after applying small correctionsto reduce the observations to what the\ would have been if the tempera-tures at the time of crushing had been exactly those stated along theright-hand margin. AKTHUK W. GRAY 675 Precisely the same data are plotted in Fig. 16. The only differenceis that the curves of Fig. 15 have been transformed into straight Hnesby the simple mathematical expedient of making the abscissas proportionalto the logarithms of the packing pressures. The results of tests at 70°and at 75°, which are here added, indicate slight deviations from the 4000. 20 40 60 Temperature Centlgfrade Fig. 17.—Data represented in Figs. 15 and 16 plotted to show that strengthOF given amalgam specimen decreases linearly with increase of law is expressed by equal angular divergence of straight linescorresponding to various^ packing pressures. logarithmic law at these temperatures, but these deviations are hardlygreater than the experimental errors. Still another view of these same facts is afforded by Fig. 17. Hereagain the straight hnes (each of which corresponds to a definite packingpressure, ranging from 100 kg. per cir. cm. at the bottom to 1600 at the 676 METALLOGRAPHIC PHENOMENA OBSERVED IN AMALGAMS top) result from direct mathematical transformation of the lines appearingin the preceding two figures, the logarithmic relations being expressedby the equal angular spacing. In this plot no corrections are necessaryfor temperature deviations from the nominal values. The points repre-sent the actual observatio
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
