C. Bants — Viscosity of Solids. 



189 



Table 2. 



Values of x 10 3 , at different consecutive times. 



No. 



So 



So — S'o. 



SlQO — S 20 



e 



2 m . 



5 m . 



r 



10 m . 



rime=: 

 20 m . 



30 m . 



40 m . 



50 m . 



d 



< 



' 2 

 19-4 



3 

 . 19-2 

 r 4 

 19-0 



0-8 

 5-9 



20 

 100 



-o-oo 

 + o-oo 



- -04 



+ -82 



- -07 

 4-1-65 



- -10 



+ 2-76 



- -12 

 + 3-63 



- -14 

 + 4-26 



- -15 



+ 4-84 



0-6 

 56 



20 

 100 



-o-oo 



+ 0-00 



- -09 

 + 1-69 



- -18 

 + 2-90 



— -28 



+ 4-48 



- -34 



+ 5-75 



- -38 



+ ... 



- -40 



o" 

 O 

 CD 

 CO < 



0-4 

 5;5 



22 

 100 



+ 0-00 



o-oo 



+ -21 

 2-32 



+ -50 



4-70 



+ '82 

 7-05 



+ 1-00 

 8-70 



+ 1-09 

 9-80 



+ 1-17 

 10-80 



< 



l 20-1 



1-5 



6-5 



23 

 100 



o-oo 

 o-oo 



•11 

 1-65 



•25 



2-90 



•37 

 4-60 



•43 



5-88 







---- 



' 



r 6 



28-8 



10-2 



15'8 



19 

 100 



o-oo 

 o-oo 



•09 

 4-40 



•67 

 7-50 



•18 

 11-00 



1-27 

 16-30 



■23 



18-70 



•23 



23-30 



26-40 



.... 







7 

 30-9 

 8 

 I 31-3 



12-3 



17-7 



20 

 100 



o-oo 

 o-oo 



1-90 

 26-50 



3220 



36-50 







< 



12-7 



17-8 



20 

 100 



000 



o-oo 



•21 

 9-00 



•49 

 1900 



•83 

 30-20 



•98 

 36-70 



41-30 



.... 







r 9 



37-2 



TcP 



34-2 



18-6 

 24-2 



19 

 100 



o-oo 

 o-oo 



•44 

 25-70 



•98 

 48-50 



1-74 



2-26 







.... 



O 



d 



15-6 

 21-0 



20 

 100 



o-oo 

 o-oo 



•63 

 20-50 



1-25 

 41-00 



2-00 

 6950 



2 48 



2-84 



.... 



11 

 1 33'5 



14-9 

 20-5 



21 

 100 



000 



o-oo 



•47 

 13-00 



100 



28-50 



1-57 



48-00 



1-90 

 61-50 



2-14 



2-33 



12 

 39-2 



20-8 



20 



o-oo 



3-50 



6-15 



8-83 



10-75 



---- 



.... 





13 

 37-0 



14 

 40-6 



18-4 



20 



o-oo 



1-67 



3-29 



5-15 



6-35 







.... 





22-1 



20 



o-oo 



3-10 



5-80 



8-50 



10-15 



11-46 



.... 



7. Before proceeding to a discussion of the results in tables 

 1 and 2, I will insert a few introductory data which hold for 

 pure platinum. The plan of tabulation and comparison is the 

 same as that explained for steel, in the remarks preceding 

 table 1. t, here is small, and %(<p+<p f ) large relatively to these 

 data, because soft platinum is much more liable to assume per- 

 manent set than steel. Moreover r is impressed negatively 

 throughout ; the changes of sign of (<p — <p f )/z are explained in 

 the text below the table, and it is to this text that the letters 



a, h, 



.y, refer. 



