Journal . f 1,025grs. sq. cm., while that for the 10-1 mm. orifice is nearly hori-zontal at 900 grs. sq. cm., the water content being 29-3% in bothcases. The difference of 125 grs. sq. cm. thus appears to be dueto orifice resistance, for the ratio of the circumference to thearea of a circle becomes greater as the circle gets less. Takingan extreme case : the critical pressure for the 5-0 mm. orificeappears to be 1,400 grs. sq. cm., and that for the 20-2 , 450 grs. sq. cm. The ratio of these is 3-1. The ratio 4of the circumference to the area of a circle is—-,. This in the a case of t
Journal . f 1,025grs. sq. cm., while that for the 10-1 mm. orifice is nearly hori-zontal at 900 grs. sq. cm., the water content being 29-3% in bothcases. The difference of 125 grs. sq. cm. thus appears to be dueto orifice resistance, for the ratio of the circumference to thearea of a circle becomes greater as the circle gets less. Takingan extreme case : the critical pressure for the 5-0 mm. orificeappears to be 1,400 grs. sq. cm., and that for the 20-2 , 450 grs. sq. cm. The ratio of these is 3-1. The ratio 4of the circumference to the area of a circle is—-,. This in the a case of the 5 mm. orifice is 0 -8, and in the case of the 20-2 , practically 0-2. The ratio of 0-8 to 0-2 is 4, which is to 100 THE PHYSICAL PROPERTIES OF CLAY be compared with the 3 • 1 above. Hence the ratio of the criticalpressures does not appear to increase so fast as the other ratio. It will be seen that the curve for the 15-1 mm. orifice isout of sequence with the others. The reason for this may be.
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
