178 Prof. G. G. Stokes. Discussion of the Results [May 12, 



Kraft's Portable Anemometer. 



Diameter of Arms between Centres of Cups 8*3 inches ; Diameter of 

 Caps 3'3 inches. Fixed to Machine at 19-10 feet from the Axis of 

 Revolution. 



Group 

 and No. 



T. 



n. 



N. 



S. 



y. 



W. 



W 2 

 2V' 



300u 



300« 



"V 



H- 

 1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 



19 



m 



15 

 18 

 16 

 17 

 17 

 22 

 23 

 19 

 19 

 17 

 19 



300 

 303 

 303 

 301 

 301 

 300 

 300 

 400 

 400 

 300 

 300 

 301 

 300 



5594 

 5681 

 5990 

 6086 

 6116 

 6143 

 6240 

 7896 

 7900 

 5966 

 5751 

 5842 

 5892 



0-6 

 0-7 

 0-7 

 05 

 0-6 

 1 1 

 1 1 

 13 

 1 1 

 0-7 

 0-8 

 0-8 

 0-8 



21 53 



23 -60. 

 27 -22 

 22-79 

 25 -65 



24 -06 

 24-06 

 24-79 



23 -71 

 21 -53 

 21 -53 



24 -14 

 21 -53 



1- 89 



2- 69 



2- 80 



1- 67 



2 25 



3 -88 



3- 88 

 3-27 



2- 78 

 2 -21 

 2 -53 

 2-82 

 2-53 



0-08 

 0-15 

 0-14 

 0-06 

 10 

 31 

 0-31 

 21 

 0-16 

 0-11 

 0-15 

 0-16 

 0-15 



95- 6 



96- 2 

 102 -8 

 104-2 

 104-7 

 105 2 

 106-9 

 101 -4 



101 -5 



102 -3 



98 -3 



99 6 

 100-9 



95-4 

 95-4 

 102 -4 



104 -0 

 104-3 

 103-6 



105 -5 

 100 -4 



100- 9 



101- 7 

 97-7 

 99 -0 



100-1 



Mean. . . 











23 -55 



2-71 



016 



101-5 



100 -8 



H + 

 1 



2 

 3 

 4 

 5 

 6 

 7 

 8 



17 



15* 



22i 



19 



16 



18 



18 



18 



300 

 300 

 300 

 300 

 300 

 300 

 301 

 300 



5372 

 5265 

 5460 

 5093 

 5282 

 5274 

 5300 

 5363 



1 

 1 4 

 1 -8 

 0-7 

 0-9 

 0-8 

 0-6 

 0-8 



24 -06 

 26*39 

 18-18 



21- 53 

 25-57 



22- 72 

 22-79 

 22 -72 



353 

 5 -42 

 4-80 



2 21 



3 37 

 2-67 

 2-0l) 

 2-67 



0-26 

 0-56 

 0-63 

 11 

 0-22 

 0-16 

 0-09 

 16 



102 -2 

 99-7 

 102 5 

 97 -4 

 100 '6 

 100 -6 

 100 9 

 102 -2 



101-0 

 97 5 

 98-9 

 96 -8 

 99 -8 

 99 -8 

 100-5 

 101 -4 



Mean. . . 











22-99 



3 33 



0'27 



100 -8 



99-4 



M- 

 1 



2 

 3 

 4 

 5 

 6 



30 

 31 



34 

 34 

 36 

 36 



300 

 300 

 300 

 300 

 300 

 300 



5488 

 5880 

 5168 

 5320 

 5030 

 4910 



0- 8 

 1 6 



1- 6 

 1 -9 

 1 7 

 1 -3 



13-63 

 13 -19 

 12 03 

 12 03 

 11 36 

 11 36 



1 -60 

 3-10 



2 53 



3 35 

 2 -83 

 2-17 



0-09 

 0-36 

 0-27 

 0-47 

 0-35 

 21 



93 3 

 99 -2 

 86-8 

 88 -8 

 84-0 

 82-3 



92 -5 

 96-6 



84 -8 



85 -4 

 81'4 

 80-9 



Mean. . . 











12 27 



2-60 



0-29 



89-1 



86-9 



M + 

 1 

 2 

 3 

 4 



38 

 38 

 36 

 35 



300 

 300 

 300 

 300 



4508 

 4250 

 5006 

 4743 



2-0 

 1-6 

 0-8 

 10 



10-76 



10- 76 

 11 36 



11- 69 



3-16 

 2-53 

 1 -33 

 1-71 



0-46 

 0-30 

 0-08 

 0-12 



84-8 

 80-9 

 95 -3 

 90-3 



81 -4 

 78 -7 

 94-7 

 89-3 



Mean. . . 











11 14 



2-18 



0-24 



87-8 



86 -0 



The mean results for the high and moderate velocities, contained in 



