KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 3. 



81 



The weathering of the härd blocks seems to be slight. The winter is mild 

 and there are no rapid changes of temperature. Thiis the stoneruns have remained 

 almost completely barren, only inhabited by very few species that are adapted to 

 the peculiar localities offered by them. 



The geological structure of the Falklands is not without a marked infhience 

 on the vegetation. The meadows of the low, level Lafonia, the district of the 

 permo-carbonian slates and sandstones, are better developed than on the Devonian, 

 the soil being more rich in nourishment. To me it also seems obvioiis, that ponds of 

 mud and clay are more frequent in Lafonia, and there the fresh water vegetation is 

 distinctly richer, both in species and in individuals. 



2. The climate. 



In my previous paper {14) I reprinted a series of meteorological observations 

 from Stanley, for the years 1875 — 77, published in Oesterr. Met. Zeitschrift 1881. Here 

 I can add another, taken by Mr. F. E. Cobb 1881 — 3 and 8.5 — 6, who had the great 

 kindness to let me publish it. As it was gained from very precise observations, 

 taken with a set of first-class intniments, established according to scientific require- 

 ments, it is of very great value for our knowledge of Falkland climate. 



I. Port Stanley, 51° 41' S., 57° 51' W. 8 m. above sea. 

 Register kept by F. E. Cobb, Esq. 



1881—83; 1885—86. 



Temperature, 'C. 



Win d 



B a i n fa 1 1 



Mouth 



c -g _E 





e 3 S 



'^'S 'i 



•ö o 

 2. I 





cT o 



o — . 



Ch o 



S E 

 ö r3 





^ g 



3.3 



0.4 



3.4 



1.4 



3.4 



1.2 



2.9 



3.2 



2.8 



3.2 



2.8 



3.4 



3.1 



2.8 



3.3 



1.4 



3.6 



2.0 



4.0 



0.6 



3.8 



0.6 



3.5 



1.2 



g S 





January . 

 February 

 March . . 

 April . . 

 May . . 

 June . . 

 July . . . 

 August . 

 September 

 October . 

 November 

 December 



Spring (IX— XI) . 

 Summer (XII— II) 

 Autumn (III— V) . 

 Winter (VI— VIII) 



10.1 



13.1 



9.6 



12.8 



8.3 



11.0 



5.4 



8.0 



4.2 



6.3 



2.7 



4.8 



2.5 



4.4 



2.4 



4.4 



4.1 



6.1 



6.9 



9.3 



8.8 



11.3 



9.8 



12.2 



5.7 

 5.8 

 4.4 

 2.1 

 1.7 

 0.4 



0.1 

 —0.4 

 1.2 

 3.2 

 3.6 

 4.8 



20.2 



—1.6 



19.9 



0.5 



18.0 



—1.8 



14.0 



— 4.5 



10 4 



—4.6 



11.6 



—11.2 



8.8 



—7.5 



10.2 



— 7.9 



10.7 



—7.3 



16.9 



—2.1 



18.3 



— 1.1 



20.6 



±0.0 



7.2 

 7.3 

 7.3 

 7.2 

 7.4 

 7.7 

 7.2 

 7.1 

 7.7 

 6.3 

 6.5 

 6.8 



73 

 80 

 81 

 77 

 78 

 79 

 75 

 78 

 76 

 90 

 82 

 76 



81.3 

 71.1 

 81.5 

 79.8 

 67.8 

 53.1 

 56.4 

 47.8 

 37.3 

 35.6 

 56.6 

 67.8 



6.6 



8.9 



3.0 



18.3 



—7.3 



9.8 



12.7 



5.4 



20.6 



—1.6 



6.0 



8.4 



2.7 



18.0 



-4.6 



2.5 



4.5 



±0.0 



11.6 



—11.2 



6.2 



8.6 



2.7 



20.6 



—11.2 



7.1 

 7.3 

 7.3 



83 

 76 



78 



3.8 

 3.4 



3.0 

 3.1 



3.2 



3.0 

 7.6 



7.6 



129.5 

 220.2 

 229.1 

 157.3 



21.0 

 17.2 

 21.8 

 22.8 

 24.0 

 21.2 

 22.8 

 21.4 

 20.0 

 13.2 

 18.4 

 17.8 



51.8 

 56.0 

 68.6 

 65.4 



Year 



7.1 



3.3 



21.4 



731.1 241.8 



^ Observations taken at 9 a. m. 



K. Sv. Vet. Akad. Handl. Band 50. N:o 3. 



11 



