Viscosity of Solids and its Physical Verification. 



Table IV. — Viscous Effect of Twisting alternately in 

 opposite Directions. 



Normal wire No. 1. Z = 30 cm. p = *0405 cm. 



201 



Remarks. 



T. 



18,. 



An. 25°. 



-•102 



18 2 . 



+•102 



18 3 . 



-102 



18 4 . 



+ •102 



18 5 . 



-•102 



18 6 . 



+•102 



I87. 



-•102 



Time. 



Xl0= 



h m 







9 13 









15 



a 



-0-00 



17 



4 



-010 



28 



15 



-5-90 



35 



22 



-7-30 



9 37 









39 



2 



+000 



41 



4 



230 



52 



15 



750 



60 



23 



9-35 



10 2 









4 



2 



-o-oo 



8 



6 



-2-10 



19 



17 



-475 



25 



23 



-5-70 



10 28 









30 



2 



+0-00 



36 



8 



295 



41 



13 



4-40 



48 



20 



5-60 



10 50 









52 



2 



-000 



59 



7 



-230 



70 



20 



-3-95 



11 11 









13 



2 



+000 



15 



4 



110 



25 



14 



375 



33 



22 



4-95 



11 35 









37 



2 



-000 



39 



4 



-0-75 



56 



21 



-345 



57 



22 



-3-55 



Remarks. 



18s 



18,. 



18, 



18, 



I81 



18, 



18, 



+ •102 



-•102 



+•102 



-■102 



+•102 



Time. 



h m 

 12 



2 



4 



20 



12 24 

 26 

 28 

 40 



:*-*' 



12 42 









44 



2 



+0-00 



46 



4 



0-80 



54 



12 



2-55 



63 



21 



370 



1 5 









7 



2 



-0-00 



9 



4 



-0-65 



21 



16 



-255 



1 23 









25 



2 



+ 000 



27 



4 



0-70 



36 



13 



2-45 



XlO 3 



After several days 



-•102 



9 47 









49 



2 





51 



4 





60 



13 



+•102 



10 2 









4 



2 





6 



4 





15 



13 



+000 

 085 

 3-80 



-000 

 -060 

 -345 



-000 

 -0 90 

 -300 



+000 

 1-00 

 640 



Similar experiments made by countertwisting glass-hard 

 wires gave results like this, but on a smaller scale. To com- 

 pare the results of Table IV. perspicuously, it is sufficient to 

 construct the difference A($ — </>')/t, of the respective values 



