396 Mr. A. H. Gibson on the Resistance to 



Table V. 



Expt. 



10 

 11 

 12 



13 

 14 

 15 

 16 



17 



18 

 19 



20 

 21 



22 

 23 



24 



26 



27 



28 

 29 



30 



31 



1 



Pipe. 



Length, 

 ft. 



108-8 



744 



108-8 



Diani. 

 ft. 



•0106c 



•01039 



•01063 



Mean 

 temp. F. 



lbs. per eq. in. (abs.). 



Vm. 



66° 



32° 

 212° 



212° 



74° 



212° 



66° 



60° 

 212° 



32° 

 212° 



32° 

 212° 



66° 



212° 



66° 



.15-3 

 15-6 

 18-0 

 172 

 17-3 

 16-3 



15-6 



18-7 

 18-6 

 18-8 

 18-6 

 175 



14-7 

 14-7 

 170 

 17-3 



18-0 



14-7 

 14-8 

 16-7 

 15-5 

 14-6 

 139 



14-8 



14-7 



137 

 136 

 14-7 



tip 



ft. per sec. 



150 

 152 

 17-4 

 163 

 16-0 

 15-2 



15-2 



16-7 

 16-6 



16-7 

 16-6 

 16-1 



14-2 

 141 



15-8 

 16-1 

 16-3 



15-5 

 155 



15-1 

 15 3 



15-6 



15-5 

 15-2 



15-2 

 15-4 



15-5 

 15*5 



15-2 

 15*4 



150 

 15-3 

 150 



•591 

 •893 

 1*28 

 1-67 

 2-66 

 2-68 



•757 



403 



3-87 

 409 

 3*89 

 2-76 



102 

 1-07 

 226 



265 



2-85 



1-11 

 122 



•520 

 •597 



•978 

 •893 



•732 



•828 



1-22 

 1*22 



•810 

 •810 



•595 

 •595 

 •591 



6-09 

 8-43 



1092 



135 



19-4 



199 



7*43 



34-6 



32-8 

 334 

 32-2 



26-8 



22-7 

 26*4 

 38-2 

 430 

 445 



10-1 

 101 



5-5 

 5 - 5 



843 



8-43 



8-42 



723 

 723 



10-95 

 1010 



7-91 

 7-23 



610 



5-56 

 609 



In these experiments the pipe was in one continuous 

 length, coiled on a drum 14 inches diameter. The pressures 

 at points in the pipe at measured distances apart were 

 measured by means of water piezometers, great care being- 

 taken to ensure these giving true pressure readings. The 

 volume of air passing through the pipe was readily determined, 



