184 



Humboldt on Isothermal Lines, and the [March, 



TABLE I. 



Places. 



March. 



April 



May. 



June. 



Differences of temp, of 

 the four months. 



M. temp, 

 of year. 



First Group. 



Concave summits in 

 America. 



Natchez, lat. 31° 28' 



Williamsburg 37 18 



Cincinnati. ..39 



Philadelphia . 39 56 



New York. . . 40 40 



Cambridge. . . 42 25 



Quebec 46 47 



Nain 5.7 



Second Group. 



Convex summits in Eu- 

 rope. 



(A) Climate of the con- 



tinent, 



Jtome 41° 53' 



Milan 45 28 



Geneva 46 12 



Buda 47 29 



Paris 48 50 



Gottingen.... 51 32 



Upsal 59 61 



Peteisburgh.. 59 56 



Umea 63 50 



Ulea 65 



Enontekies . . 68 30 



(B) Cliraateof thecoast. 



Nantes 47° 13' 



London 51 30 



Dublin 53 21 



Edinburgh. ..57 57 

 Cape North.. 71 



Third Group. 

 Concave summitof Asia 

 Pekin 39° 54' 



58-0° 

 46-4 

 43-7 

 440 

 38-6 

 34-6 

 230 

 6-8 



50 4 

 47-8 

 39-6 

 38-3 

 42-2 

 34-2 

 29-4 

 27-5 

 230 

 140 

 11 4 



500 

 44-2 

 419 



414 



24 8 



66£° 



61-2 



57-4 



53-6 



491 



45-5 



39-6 



27-5 



55-4 

 51-0 

 45-6 

 49' 1 

 48-2 

 441 

 398 

 36-9 

 34-2 

 26 

 266 



53-6 



49-8 

 45-8 

 47-3 

 300 



41-4 57 



72-6° 



66-6 



61-2 



61 8 



65-8 



56-8 



54-6 



37-0 



67 

 65-2 

 58-1 

 64-8 

 600 

 57-8 

 48-8 

 52-2 

 43-7 

 41 

 36-5 



6Q-0 

 56-4 

 51-8 

 50-6 

 340 



70-4 



79-2° 



77-8 



70-8 



72-4 



82-2 



70-2 



63-8 



43-8 



72-4 

 706 

 62-2 

 68-4 

 64-4 

 63-2 

 580 

 59-4 

 550 

 550 

 49-4 



65-6 

 64-2 

 556 

 57-2 

 40- 1 



84-2 



8-2° 

 14-8 

 13-7 



9-6 

 10-5 

 10-9 

 16-6 

 20-7 



50 



3-2 



60 



10-3 



60 



9-9 



10-4 



9-4 



1 1-2 



120 



15-2 



36 



5-6 

 3-9 

 5-9 

 5-2 



6-4° 



5-4 



3-8 



8-2 



16-7 



11-3 



150 



95 



J16 

 14-2 

 12-5 

 15T 

 11-8 

 13-7 



90 

 15-3 



9-5 

 150 



99 



13-6 

 6-6 

 60 

 3-3 

 40 



6-6° 

 11-2 



9-4 

 10-6 

 16-4 

 13-4 



9-2 



6-8 



5-4 

 5-2 

 4 1 

 3-6 



44 

 5-4 



9-2 



7-2 



11-3 



140 



12-9 



5-6 

 7-8 

 3-8 

 66 

 61 



15-6 23-4 13-8 



64-8° 



58- 1 



53-8 



53-6 



53-8 



50-4 



41-8 



26-4 



60>4 

 55-8 

 49-2 

 600 

 600 

 46-7 

 41-9 

 38-8 

 332 

 350 

 270 



54-6 

 51G 



48-4 

 47-8 

 320 



54-S 



TABLE II. 



Places. 



(Pondicherry) 



Cairo , 



Funchal. . . 



Rome 



Bourdeaux, 



Paris 



Copenhagen 

 Stockholm. 

 Drontheim. , 

 XJmea , 



Cisatlantic band, longitude 

 29° E. 20° W, 



Lat. 



11° 3p' 



30 2 



32 37 



41 55 



44 50 



48 50 



55 -41 



59 20 



63 24 



63 50 



Mean temp, of the 



Win- 

 ter, 



Year. 



85-4° 



72-6 



68-4 



601 



56-5 



51-8 



45-6 



42-2 



39-7 



310 



77-0° 



57-6 



63-8 



45-8 



42-0 



38-3 



310 



26-0 



240 



13-4 



Sum- 

 mer. 



90-8° 



84-6 



72-5 



75-2 



70-9 



66-2 



62-6 



61-8 



61-3 



54-4 



Places. 



Cumana 



Havannah . . . 



Natchez 



Cincinnati. . . 

 Philadelphia. 

 New York . . 

 Cambridge. . . 

 Quebec ...... 



Nain ........ 



Fort-Churchill 



Transatlantic band, longi- 

 tude 67° E. 97" W. 



Lat. 



10° 27' 



23 10 



31 28 



39 6 



39 56 



40 40 

 42 25 

 46 47 

 57 10 

 59 2 



Mean temp, of the 



Win- Sum- 

 ter, mer. 



Vear. 



81-6° 



77-7 



64-8 



53-6 



531 



53-9 



50-4 



41-6 



26-4 



25-5 



81-3° 

 80-4 

 48-6 

 32-9 

 32-2 

 300 

 340 

 150 

 - 0-4 

 6-8 



83-3° 



79-9 



790 



73-Q 



73-8 



790 



70-4 



68-0 



48-4 



520 



