6 Palmer — P 



ressure 



Coefficient of Mercury Resistance. 



were eliminated on the assumption that the coefficient of cubi- 

 cal compressibility of the glass used was *0000025. Calcula- 

 tions were instituted to determine the effect on the measure- 

 ments of the slight changes in pressure, and hence in the 

 resistances of the mercury thread, due to leakage of the com- 

 pressor and gauge between the direct and reverse settings of 

 the bridge wire contact, and it was found that the errors so 

 introduced were generally so small and their calculation so 

 uncertain that no appreciable benefit could be obtained by 

 attempting their correction. 



Table I. 



R 



1 



57 



149 



241 



301 



386 



459 



515 



544 



581 



1 



1 



375 



552 



581 



605 



649 



729 



1441 



1504 



1574 



1619 



1686 



1755 



1831 



1923 



177 



359 



532 



684 



851 



1047 



12 

 12 

 12 

 12 



12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 11 

 11 

 11 

 11 

 11 

 11 

 11 

 11 

 12 

 12 

 12 

 12 

 12 

 12 



470 

 414 

 382 

 344 

 308 

 294 

 265 

 250 

 228 

 205 

 456 

 452 

 261 

 215 

 216 

 200 

 192 

 163 

 837 

 809 

 785 

 765 

 740 

 719 

 702 

 666 

 37S 

 306 

 230 

 180 

 116 

 020 



R' 



12' 

 12 

 12 



12 

 12 

 12 



,12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 12 

 11 

 11 

 11 

 11 

 11 

 11 

 11 

 11 

 12 

 12 

 12 

 12 

 12 

 12 



451 

 428 

 390 

 352 

 327 

 292 

 262 

 239 

 227 

 211 

 451 

 451 

 297 

 225 

 '211 

 201 

 183 

 150 

 '855 

 '829 

 •800 



•754 



•725 

 •694 

 •656 

 •378 

 •303 

 •231 

 •169 

 •100 

 •018 



R.-R' 



- 





019 

 014 

 008 

 008 

 019 

 002 

 003 

 011 

 001 

 006 

 005 

 001 

 036 

 010 

 005 

 001 

 009 

 013 

 018 

 020 

 015 

 017 

 014 

 006 

 008 

 010 

 000 

 003 

 001 

 011 

 016 

 002 



R 



1199 



1400 



1651 



1890 



1984 



113 



186 



282 



378 



461 



537 



623 



692 



777 



867 



133 



881 



918 



990 



1045 



1173 



1230 



1297 



1369 



1425 



1479 



1542 



1571 



154 



154 



106 



106 



11-963 

 11-871 

 11-749 

 11-678 

 11-637 

 12-406 

 12*374 

 12-333 

 12-302 

 12-255 

 12-236 

 12-195 

 12-168 

 12-142 

 12-071 

 12-396 

 12-105 

 12-094 

 12-050 

 12-035 

 11-976 

 11-942 

 11-919 

 11-878 

 11-858 

 11-838 

 11-815 

 11-828 

 12-388 

 12-388 

 12 406 

 12-403 



11-956 



•( 



11-872 



— •< 



11-768 



— •( 



11-669 



• 



11-630 



• 



12-405 



• 



12-375 



— -1 



12-335 



— • 



12*295 



•( 



12-261 



— • 



12-230 



• 



12-194 



• 



12-165 



• 



12-130 



• 



12-100 



— • 



12-396 



• 



12-087 



• 



12-072 



• 



12-042 



* 



12-019 



* 



11-966 



• 



11-943 



— • 



11-915 



• 



11-885 



— • 



11-862 



— • 



11-839 



-' 



11-812 



• 



11-801 



• 



12-388 



• 



12-388 



• 



12-408 



— • 



12-408 



— • 



R-K' 



•007 

 •001 

 •019 

 •009 

 •007 

 •001 

 •001 

 •002 

 •007 

 •006 

 •006 

 •001 

 •003 

 •012 

 •029 

 •000 

 •018 

 •022 

 •008 

 •016 

 •010 

 •001 

 •004 

 •007 

 •004 

 •001 

 •003 

 •027 

 •000 

 •000 

 •002 

 •005 



Five or ten minutes were always allowed to elapse after each 

 increment to the pressure before the resistance measurements 



