266 



ME. CLERK MAXWELL ON THE VISCOSITY 



Table II. 



Results of experiment 62. 



Mean time often vibrations =362"66 

 Mean log. decrement . . = 0-1588574. 



Table III. 

 Equations from which |U< for air was determined; m= 



461°+« 



Final result |i/,* = -00001510 (461° + ^) with probable error 0-30 per cent. 

 Ki=-0000439, K2=-0000524. 



Table IV. — Experiments with Arrangement 5. 



No. of 

 experi- 

 ment. 



Absolute 

 tempe- 



Pressure, 

 in inches 



rature 

 461°+e. o' mercury. 



Time of 

 five double 

 swings, in 



seconds. 



Correction for 



inertia of air 



(l + :r) 



in equation (24). 



L= decrement of logarithm 

 of arc in ten single vibrations. 



L' calculated. L observed. 



DiiT. L-L'. 



62. 

 77. 

 80. 



63. 

 64. 

 81. 



65. 

 71. 



72. 



75. 

 76. 

 79. 



629 

 516 

 527 



527-5 



635 



616 



524 

 513 

 614-5 



617 



512-5 



521 



0-55 

 0-50 

 0-56 



5-57 

 5-97 

 5-52 



25-58 

 19-87 

 20-31 



29-90 

 29-76 



28-22 



362-66 

 362-80 

 364-04 



362-72 

 362-94 

 363-80 



362-64 

 362-50 

 362-86 



363-8 



362-89 



363-9 



1--0000157 

 1 -•000157 

 1 -.000486 

 1— -00058 



-15719 

 -15378 

 -15648 



•15680 



-15875 

 •15379 



•15555 

 -15299 

 -15338 



-15398 

 -15280 

 ■15502 



15886 

 15260 

 15946 



15628 

 15838 

 15389 



15422 

 15144 

 15269 



15377 

 15146 

 15510 



+ 167 



— 118 

 + 279 



— 52 



— 37 

 + 10 



— 1.33 



— 155 



— 69 



— 21 



— 134 



+ 8 



This is the result derived from these equations, which is 1-2 per cent, too large. 



