490 M. Hermann Herwig on the Independence of Temperature 



the night resumed the temperature of its environment, it always 

 gave closely correct indications; and, finally, another careful 

 calibration of the tube, after the completion of the experiments, 

 led very rigorously to the previous values. 



In like manner I now arranged also the second tube as a large 

 thermometer, and had in its indications of temperature (14 mil- 

 lims. went to 1 degree) the surest determination of the tempera- 

 tures t 1 , whether I operated with or without a current. 



The apparatus thus altered gave the results contained in the 

 following Tables, which were likewise attained without a current 

 passing. The numbers were gained in several ascending and 

 descending observations, and are here arranged according to the 

 temperatures T. 



Table IV. 











T-t' 



No. 



T. 



f. 



m. 



m — t' 



IS. 



457 



16-5 



20-27 



7-73 



19. 



49-9 



1676 



21 08 



7-67 



20. 



58-8 



1705 



22-59 



754 



21. 



58-8 



17 4 



231 



7-29 



22. 



58-8 



17-08 



22-59 



7-57 



23. 



61 2 



16-63 



22-46 



7-65 



24. 



78-1 



1734 



25-4 



7-54 



25. 



78-2 



17-6 



25-9 



7-ao 



26. 



1051 



171 



28-72 



7-58 



27. 



1071 



17-27 



29-29 



7-47 



28. 



1274 



18 09 



32-67 



7-49 



29. 



128-4 



18 



32-6 



756 



30. 



129-4 



1762 



32-53 



7-49 



31. 



129-4 



18-62 



33-41 



749 



32. 



129-6 



17-77 



32-66 



751 



33. 



130-4 



17-48 



32-41 



756 



34. 



130-7 



17-62 



32-66 



7-55 



35. 



130-8 



18-77 



33-63 



7-54 



36. 



131-4 



18-8 



33-74 



7-54 



37. 



131-4 



18-59 



33-53 



7-55 



38. 



131-9 



18-8 



33-84 



7-52 



39. 



132-6 



18-2 



33-5 



7-48 



40. 



155-7 



192 



37-26 



755 



41. 



1578 



19-27 



37-69 



7-52 



42. 



158-8 



19-33 



37-9 



7-51, 



43. 



158-8 



19-3 



37-88 



7-51 



44. 



159-2 



19-33 



37-97 



7-50 



45. 



159-4 



19-36 



3803 



7-50 





1631 



18-62 



38-48 



727 





165 2 



18-7 



38-73 



7-31 





168-3 



18-55 



39-35 



7-20 





168-5 



18-48 



39-35 



719 



The numbers of the last column clearly decide the present 

 question thus, that the heat-conducting power of pure mercury 



