170 



Mr. C. Barus on the Viscous Effect of 





Table V.- 



—Viscosity of Hard-c 



rawn 



Steel compared with Soft. 





2p = -082 centim. ; 11=1+1 



=30 centim. +30 centim. 



Wire 



drawn (2p = ^13 cm. to •08 cm.) 

 very i^esilient. 



Same wire annealed at red heat in air. 



0. 



r. 



Time. '^~'^'xl03. 



e. 



r. 



Time. 



'^~^'xl03. 



0'. 



2(0+^')- 





T 



0'. 



2{<p+p'). 





T 



30 



+•0959 



6 52 





30 



-•1019 



1 32 





30 





54 



•00 



30 





34 









55 



4^37 







35 



-•00 







57 



10-10 







37 



-•13 







60 



15-68 







40 



-•17 







63 



19-46 





-•0028 



44 



-•20 



30 



+ •0087 



6 30 



34-47 











-•0916 



6 32 





30 



+•1034 



1 45 





30 





34 



- •GO 



30 





47 



+•00 







35 



- 4-72 







48 



•10 







37 



-10^50 







50 



•10 







40 



-16-16 







53 



•15 





-•0131 



44 



-20-88 





+ 0014 



57 



•21 



100 



+•0916 



6 52 





100 



-•1019 



2 00 





30 





63 



•00 



30 





02 



- •OO 







54 



16-80 







03 



- -47 







55 



27-30 







05 



- -91 







56 



34-50 







08 



-1-28 





+ 0131 



56-7 



39-05 







-•0028 



12 





100 



-•0873 



6 58 





Accide 



nt. 





30 



-•0175 



59 

 60 

 61 

 62 

 63 



- -00 

 -16-80 

 -26-30 

 -33-70 

 -39-40 











Table VI. — Viscosity of Hard-drawn Steel compared with Soft. 2p = -082 ; 

 ^=^'=.30 cm. ; = e'=3O°. Wire drawn (2p = -13 to -08 cm.) very resilient. 



r. 







r. 







2(0+f). 



Time. 



lO^X(0-0')/r. 



2(^+0'). 



Time. 



l(y'x{<p-(p')/T. 



+ 099 



3 40 





+ 099 



5 17 







41 



•00 





18 



•00 





42 



3-77 





19 



2-83 





43 



6-39 





20 



4-44 





44 



8-30 





21 



5-80 





45 



9-80 





22 



6-80 





46 



IMO 





23 



7-70 



+ ■006 



47 



12-20 





24 



8-40 









+-006 



25 



910 



-•099 



5 02 





-•099 



5 35 







04 



- -00 





36 



- -00 





05 



- 2^70 





37 



-2-35 





06 



- 4-65 





38 



-3^77 





07 



- 606 





40 



-5-80 





08 



- 7-35 



-•006 



45 



-8-90 





09 



- 8-40 



+ •099 



5 46 







10 



- 9-30 





47 



-00 



-006 



12 



-10-90 





48 

 49 

 50 



52 



210 

 3-36 

 4-30 

 6-73 









+ 006 



56 



7-70 1 



