Rowland's Thermometers with the Paris Standard. 19 



small. Such large experimental errors as there are must be 

 probably in connexion with the position of the zero. Row- 

 land always read his thermometers with the naked eye, and 

 although this was the only practicable way of using them 



Table V. 

 Comparisons of Tonnelot thermometers with each other. 





11801 ! 



md 11811 compared. 



Observed 



readings. 



Headings reduced to the hydrogen 



scale. 



Tonnelot 

 11801. 



Tonnelot 

 11811. 



Tonnelot 

 11801. 



Tonnelot 

 11811. 



11801-11811 







12 April, 1897. 





10-529 

 25-470 

 36-643 



10615 

 25-981 

 37-354 



10421 

 25-338 

 36-478 



10-423 

 25-344 

 36-475 



-•002 

 -•006 

 +•003 







14-April, 1897. 





7-681 

 24-562 

 36-725 



7-682 

 25051 

 37-438 



7-570 



24-432 

 36-560 



7-570 

 24-436 

 36-559 



1 -000 

 -•004 

 + •001 



11800 and 11811 compared. 



Tonnelot 

 11800. 



Tonnelot 

 11811. 



Tonnelot 

 11800. 



Tonnelot 

 11811. 



11800-11811 







21 April, 1897. 





7-196 

 20-180 

 29-925 



38-783 



8-019 

 19-610 

 28-324 

 36-165 



7-898 

 19-143 

 27-598 

 35-297 



7-899 

 19-140 

 27 607 

 35-308 



-•001 

 + •003 

 -•009 

 -011 







23 April, 1897. 





9523 

 21-232 

 30 961 

 40879 



10079 

 20-554 

 29-246 



38022 



9 896 9-896 

 20-053 20059 

 28-500 28-504 

 37-123 37-132 



27 April, 1897. 



•000 

 --006 

 -004 

 -009 



7-966 

 20-299 

 32-595 

 40-773 



8-702 

 19-725 

 30-689 

 37-929 



8-570 

 19-252 

 29927 

 37-035 



8568 

 19-257 

 29-933 

 37-041 



4-002 

 -•005 

 -•006 

 -•006 



C2 



