Journal . zoo\150 10 IS So — Discharge or Clay its 25 Grs per SET~XXVn. that the experiment was made after the clay had been left atrest in the container for six days, and the experiment was madewithout disturbing the clay, whereas in the other cases the clayhad been puddled and put in a short while before the experi-ments. THE PHYSICAL PROPERTIES OF CLAY. 101 Another way of considering the results recorded by thecurves forming Set XXVII. is to notice that for some givendischarge, say of 10 grams per min., the 20-2 mm. orifice neededa pressure of 415 grs. persq. cm., while the 10-1 mm. orifice
Journal . zoo\150 10 IS So — Discharge or Clay its 25 Grs per SET~XXVn. that the experiment was made after the clay had been left atrest in the container for six days, and the experiment was madewithout disturbing the clay, whereas in the other cases the clayhad been puddled and put in a short while before the experi-ments. THE PHYSICAL PROPERTIES OF CLAY. 101 Another way of considering the results recorded by thecurves forming Set XXVII. is to notice that for some givendischarge, say of 10 grams per min., the 20-2 mm. orifice neededa pressure of 415 grs. persq. cm., while the 10-1 mm. orifice neededa pressure of 830 grs. per sq. cm., , in this case the pressuresare inversely as the diameters of the orifices. For the samedischarge the 10-1 mm. orifice needed 830 grs. sq. cm. and the 5 ? u o 03 a 900p; - u. .jO — < a a z 7jq.;;;:j-i p3 a 310 600§p « r u f—.-r-f a Hnm a 50O- f 1 SS&-; {fe:.^ ^Sfe ^ Diam: or Orifice M/M SettSZM 7-5 mm. 930 grs. sq. cm. The ratio of these diameters is — = 1 35, and the inverse ratio of the pressure is 930/830 = 112. The 12-4 mm. orifice needed a pressure of 635 cm. and the 10-1 mm. orifice 830 gr. sq. cm. The ratio of 102 THE PHYSICAL PROPERTIES OF CLAY. these diameters is 12-4/10-1 = 1-23, and the inverse ratio ofthe pressures is 830/635 = 1 -31. The curves have been exterpolated a short distance backto the ordinate representing no discharge, and the intersections T~Ti 7~ !~T~: i:1
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
