Journal . I next tried a pipe j-in. bore bent into a circularring (Fi« 6). One end of the pipe was sealed, theother open end formed the inlet. There was a branchsoldered on at half length of the pipe, which couldbe used as an inlet. Again it was found that theposition of the inlet pipe did not affect the results When a small current of air was passed into thispipe of the twelve holes which were drilled into it,only a few began to deliver. The position of theseholes could not be foretold when the ring wasperfectly level, but, if the ring was slightlyout of level, the highest holes had the lead.
Journal . I next tried a pipe j-in. bore bent into a circularring (Fi« 6). One end of the pipe was sealed, theother open end formed the inlet. There was a branchsoldered on at half length of the pipe, which couldbe used as an inlet. Again it was found that theposition of the inlet pipe did not affect the results When a small current of air was passed into thispipe of the twelve holes which were drilled into it,only a few began to deliver. The position of theseholes could not be foretold when the ring wasperfectly level, but, if the ring was slightlyout of level, the highest holes had the gradually increasing the air all the twelveholes could be supplied. When measuring thequantity of air delivered by each hole, it wasfound that the holes delivered all the same quantity,those nearest to the inlet pipe delivering no morethan those furthest from it. On increasing stillfurther the current of air, each hole delivered mire. and more air, all alike. Of course there was no otheroutlet for the air than the twelve holes. This typeof apparatus is the one which can distribute anyamount of air, larger than a certain minimum, which Nov. ] THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. 709 was necessary to supply all the holes. To findthat minimum and how to calculate for any given casethe number and size ol the holes was the purpose ofthe next experiment. I placed a cylindrical vessel, open at bottom, havingone single hole i\5in. drilled in the centre of the top,under water (Fig. 7). On the vertical side of thisvessel I drilled four holes in a vertical line iin. apart,the first hole being gin. from top of vessel. Air was supplied and so regulated that whilst aregular stream issued from the top hole, now and thena bubble would rise from one of the side holes, theothers being plugged. This side hole, by deliveringbubbles, showed how far the liquid was depressedunder the cylinder and served thus as a simp
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
