420 Transactions of the South African Philosophical Society. 



TABLE I. 













>> 



Observed. 



S ° 

 CO CD 



eg 



CO 







&": 



CD H 





TS 



excess of the 



OS 



eg 







o o 

 J* 



?6 





8*3 



Readings of 















flop. 



the Mercurial 

 Standard No. 



O 









IE-lid 



fflrt 

 ft Q 





n to do 

 ■w © g 



O M H 



714 over those 



Oflb 





1905. 





S 2-i 



S 



of Casella 

 No. 1,470 used 



•H .5 1- 3 





1 





4=CC 



EH 





as an ordinary 



s-i ° 



fd 



CD 







CD 











w 





•S o 



ftr^ 

 40 CD 

 CO O 

 CD |3 



O 1) 



8,2 



.H O 



S CD 





0)30) 



r, CD 

 M ft 



a 



EH 



Thermometer 

 at — 



SS 

 . O 



cD^ti 



3* 







Oh. 



6h. 





a. 



O 



O 







h. m. 























Nov. 1 



62-0 



62-9 



-0 



9 



5 35 



-1-9 











-0-2 



62 



7 



-0-7 



2 



60-5 



61-4 



-0 



9 



5 40 



-1-5 



+ 1 



3 



+1-1 



62 



5 



-2-0 



3 



63-9 



64-5 



-0 



6 



5 30 



-1-3 



+0 



8 



+0-7 



65 



2 



-1-3 



4 



66-4 



67-3 



-0 



9 



5 5 



-1-1 



+0 



2 



o-o 



67 



3 



-0-9 



5 



63-5 



64-2 



-0 



7 



4 40 



-1-2 



-0 



3 



-0-4 



63 



8 



-0-3 



6 



62-3 



63-4 



-1 



1 



5 15 



-0-9 



+1 







+0-7 



64 



1 



-1-8 



7 



66-1 



66-8 



-0 



7 



4 25 



-0-8 



-0 



2 



o-o 



66 



8 



-0-7 



8 



64-9 



65-8 



-0 



9 



4 25 



-1-0 



+0 



4 



+0-1 



65 



9 



-10 



9 



68-5 



69-2 



-0 



7 



4 10 



-1-2 



-0 



1 



-0-5 



68 



7 



-0-2 



10 



68-3 



68-7 



-0 



4 



23 



-1-1 



+0 



5 



-1-1 



67 



6 



+0-7 



11 



655 



67'0 



-1 



5 



5 15 



-1-0 



+1 



1 



+0-8 



67 



8 



-2-3 



12 



66-5 



67'5 



-1 







5 30 



-1-1 



+0 



9 



+0-7 



68 



2 



-1-7 



13 



66-6 



67-7 



-1 



1 



3 35 



-1-2 



+0 



2 



-0-3 



67 



4 



^0-8 



14 



66-6 



67-8 



-1 



2 



5 25 



-1-1 



+0 



1 



0-0 



67 



8 



-1-2 



15 



67-6 



68-4 



-0 



8 



6 25 



-1-1 



+0 



9 



+0-7 



69 



1 



-1-5 



16 



66-6 



67'2 



-0 



6 



5 



-1-1 



+0 



5 



+0-2 



67 



4 



-0-8 



17 



66-4 



67-2 



-0 



8 



5 15 



-0-9 



+0 



7 



+0-4 



67 



6 



-1-2 



18 



67-7 



68-9 



-1 



2 



4 30 



-1-1 



+1 



3 



+0-7 



69 



6 



-1-9 



19 



72-2 



72-1 



+0 



1 



23 55 



-0-6 



-0 



3 



-0-6 



71 



5 



+0-7 



20 



71-1 



71-0 



+0 



1 



23 



-0-3 



+1 



8 



-0-3 



70 



7 



+0-4 



21 



68-1 



68-0 



+0 



1 



20 30 



-0-4 



+0 



3 



-0-4 



67 



6 



+0-5 



22 



67-9 



68'0 



-0 



1 



15 45 



-0-2 



+0 



1 



-0-2 



67 



8 



+0-1 



23 



67-5 



67-8 



-0 



3 



4 20 



-0-2 











o-o 



67 



8 



-0-3 



24 



69-9 



70-2 



-0 



3 



1 



-0-7 



+0 



3 



-0-5 



69 



7 



4-0-2 



25 



70-6 



71-0 



-0 



4 



4 45 



-0-1 



+0 



2 



+0-1 



71 



1 



-05 



26 



70-4 



70-3 



+0 



1 



5 5 



-0-2 



+0 



1 



o-o 



70 



3 



+0-1 



27 



71-0 



71-2 



-0 



2 



2 50 



-0-6 



+0 



3 



-0-1 



71 



1 



-o-i 



28 



71-4 



71-5 



-0 



1 



3 15 



-0-4 -1 



1 



-0-4 



71 



1 



+0-3 



29 



72-0 



72-0 











6 



-0-5 j 







0-0 



72 







0-0 



30 



67-2 



67-3 



-01 



21 



-0-2 ; -0-3 



-0-2 



67-1 



+0-1 









Sum 











Sum 



Mean 



— 



— 



17-5 



— 



-0-83 +0-36 



— 



— 



24-3 



Column 



1 



2 



3 



4 



5 6 



7 



8 



9 



The results in Table I. are shown graphically in Fig. 1. It is 

 very apparent that the differences (column 9) between the minimum 

 temperatures (column 8), as recorded by Casella No. 1,470 (reduced 

 to Standard No. 714), and the lowest points on the thermograms 



