APPENDIX. 



399 



possess continuous observations are those mentioned in the 

 text (p. 273) ; but we also know with sufficient accuracy the 

 chmates of two widely separated islands lying about 50° south ; 

 and from these we derive results widely different from those 

 to which we were led by theoretical considerations. The fol- 

 lowing table gives approximately the mean temperatures, on 

 Fahrenheit's scale, for the year and for the hottest and coldest 

 months of the places referred to in the southern hemisphere, 

 and the means for corresponding latitudes in the northern 

 hemisphere : — 



If we compare the mean results of these five stations with 

 those for corresponding latitudes in the northern hemisphere, we 

 find that the summers are cooler and the winters very much 

 milder, and that in the latitudes between 50° and 55° the mean 

 annual temperature is notably higher. In Kerguelen Land 

 alone the mean annual temperature is lower than the normal 

 for the same latitude north of the equator ; but that island is 

 evidently exposed to exceptional conditions. 



* The observations at Stanley Harbour, which are those adopted by 

 Dr. Hann {A7imato/ogie, p, 697), show temperatures notably lower than 

 those recorded for a place in the islands lying farther south, which are 

 given in \}!\q Zeitschrift der CEsterreichischen Gesellschaft fiir AleteorologiCy 

 vol. V. p. 369. The mean of the two is probably nearly correct. 



t These figures are derived from the tables given in the Anales de la 

 Oficina Meteorologica Aj'gentma, by B. Gould, vol. iii. The figures show 

 a considerable amount of annual variation. The monthly means of the 

 six months from February to July, 1879, exceed those of the same 

 period in 1878 by more than 2° Fahr. 



