114 Temperature, at Stockholm. [Feb, 



The year may be divided into 73 penthemerons (or portions of 

 five days each)^ with some little anomaly for the intercalary 

 days. I have made this division to show the temperature of the 

 year more equally. In the following table, the first number, 

 — 5*596 (for example) is the mean of ail the thermometer 

 heights for vhe first live days of January, during all the 50 yearSj 

 and of course the medium of 'J50 observations. The same 

 remark applies to all the other numbers. 



To convey a distinct idea of the ascending and descending 

 progression of the rxiedium observations, I have not only drawn 

 up the following table, but likewise constructed the diagram 

 (plate 2),^ where the dots denote the mean heights actually 

 observed, and the curve line the probable hypothetic mean. 



A glance of the eye shows how nearly they agree, as long as 

 the thermosiieter is above the mean temperature of the year, but 

 that the difference between them goes as far as 2 degrees (3*6 

 degrees Fahrenheit) during the first three months of winter. 



NijmT)er of Midille day Medium of 



peiilheme- of the pe>i- 50 ye=\rs' 



Mcas. t'litmeron. observations. 



1 Jao. 3 — 5'51)6° 



2 8 5-098 

 3^ 13 4'7dl 



4 13 4-215 



5 23 4-193 

 G ■ 28 3-401 



7 Feb. '2 3-942 



8 7 4731 



9 12 '4-690 



10 17- 3-683 



11 22 2-995 



12 27 2-685 



13 March 4 S-229 



14 9 3-660 



15 14 2-272 



16 19 2-190 



17 24 1-168 



18 23 0-281 



19 April 3 +1*273 



20 8 2-470 



21 13 3-009 



Probabk 



Difference. 



Column 3<1 i> 

 degreeu of 

 Fahrenheit. 



tneai) 

 teinper. 





-4'521° 



-1-075 



21-927° 



4-898 



— 0-200 



22-824 



5-214 



+ 0423 



23-376 



6-456 



+ 1-241 



24-413 



5-572 



+ 1-371 



24-453 



5-421 



+ 2-020 



2S-87S 



5 165 



+ 1-223 



24-904 



4-S38 



+ 0-107 



23-484 



4-451 



-"0-239 



23-558 



4-018 



+ 0-331 



25-403 



3-532 



+ 0 537 



26-609 



3-008 



+ 0-323 



27-167 



2-446 



-0-783 



26-188 



1-848 



- 1-812 



25-410 



1-216 



1-056 



27*910 



0-552 



-1-638 



28-060 



-f 0-143 



— 1-311 



29 •89a 



0-867 



-1-148 



31-49^ 



1-620 



-0-347 



34-295 



2-399 



+ 0-071 



36-446 



3-205 



-0'196 



37-416 



* Tfie degrees of the thermometer m the original are those of Celsius, For 

 the sake of the English reader tliey bave been changed in the plate for tliose of 

 Fahrenheit. The Editor has likewise inserted the mean temperature at liondoa 

 *Jiris3g ISlOj by way cf comparisoB wilb that of Stockholm, 



