the Mercury Unit of Electrical Resistance, 

 Table I. {continued). 



163 



Place. 



3. 



5. 



7. 



8. 



10. 



11. 



12. 



13. 



14. 



15. 



390 



15 5 



20-7 



79 



35-8 



138 



14-6 



11-9 



11-2 



170 



15 7 



410 



155 



20-8 



79 



35-6 



139 



14-6 



120 



11-3 



170 



15*6 



430 



15-6 



210 



7'95 



35-4 



13-9 



14-6 



120 



11-3 



171 



15*5 



450 



156 



21-2 



7-95 



35-0 



13-8 



14 6 



120 



11 4 



17*2 



15*45 



470 



15-7 



21-2 



7-95 



35-0 



137 



14-6 



120 



11-5 



17*2 



154 



490 



15-7 



211 



7-95 



35-2 



137 



146 



120 



11-55 



17*2 



15*4 



510 



157 



21-0 



7-95 



35-3 



13-9 



14-6 



12 05 



11*6 



17*1 



15*2 



530 



15-8 



21-0 



79 



35-5 



140 



14-6 



1205 



11*6 



17*1 



15-3 



550 



15-8 



210 



79 



35-6 



14 



14-6 



120 



11-6 



171 



15*4 



570 



15-8 



21 



7-8 



35-7 



13-9 



146 



120 



11 6 



171 



15*5 



590 



15-8 



20*9 



7-8 



35-8 



139 



14-6 



120 



11-5 



171 



15*5 



610 



15-8 



20-8 



7-8 



35-9 



13-8 



14-5 



120 



11-5 



171 



15*6 



630 



15-8 



210 



775 



35-9 



13-7 



14-6 



120 



11-4 



171 



15-6 



650 



15-8 



210 



77 



360 



137 



14-6 



120 



11-3 



17-1 



15-5 



670 



15-9 



21-3 



765 



3605 



13-6 



14-6 



12-0 



11*3 



171 



15-5 



690 



15-9 



21-4 



7-fi 



36*1 



136 



14-6 



120 



11-3 



170 



15*5 



710 



160 



21-2 



76 



36-15 



13-7 



146 



12-0 



11-4 



170 



15-5 



730 



160 



211 



7'6 



3615 



13-7 



14-6 



11-95 



11*3 



170 



153 



750 



160 



20-9 



7-55 



3605 



13-8 



145 



11-9 



11-3 



17*0 



152 



770 



16-0 



20-8 



75 



360 



13-9 



14-45 



12-0 



11*2 



170 



151 



790 



160 



20-8 



7'5 



360 



140 



14-4 



12-0 



11-2 



170 



151 



810 



161 



20-8 



75 



36-0 



14-1 



14-4 



11-8 



11-2 



17*0 



150 



830 



16-4 



207 



7-5 



35-9 



141 



14-2 



11-7 



11*2 



170 



150 



850 



16-7 



20-7 



7-5 



35-8 



14-1 



14-2 



11-6 



111 



17*0 



15*0 



870 



16-8 



20-7 



75 



35-8 



140 



14-2 



11-55 



111 



170 



151 



890 



16-8 



20-7 



7*5 



360 



140 



14-2 



11-5 



111 



170 



15-1 



910 



16-8 



20-7 



75 



36-2 



141 



14-2 



11-65 



111 







930 



168 



20-5 



7-6 



36-6 



14-2 



14-2 



1175 



11*2 







950 



16-9 



20-5 



7-6 



37-0 



14-3 



14-25 



11-9 



11*2 







970 



169 



20-5 



7-7 



373 



14-5 



14 3 



11*9 



11*2 







990 



16-9 



20-5 



7-8 





14-4 



14-25 



12-0 



11*2 







Readings with other lengths* were made in the same way at 

 the places of greatest and least section, as shown by the preceding 

 Table, and the coefficients (C) for correction for conicalness cal- 

 culated from means of the values of a given by the different 



readings. 



The formula employed is the same as developed by Dr. Siemens, 

 and used in calculating the correction-coefficients in the first 



* In the original determination the values of C were calculated a little 

 too small, the result of employing a too long thread of mercury (Pogg. Ann. 

 vol. ex. p. 8. Table I.), which has obviously the effect of hiding the smaller 

 inequalities. The differences are, however, not considerable, as will be 

 seen by comparing the numbers. 



Tube. 



C according to 



Original determination. 



Present reproduction. 



3 

 5 



1 002820 

 1-000289 



1002775 

 1-000393 



M2 



