On variations of climate in the course of time. 



By 



A. Blytt. 



(Presented to the Society june 11. 1886\ 



The following is a shorfc abstract from various papersj viz. : 



Essay on ihe immigration of the Norwegian flora duriiig alternating rainy and 



dry periods. Chria. (A. Cammermeyer) 1876. 8. 89 pp. With a coloured map 



of Norway. 



Die TJieorie der wechselnden kontinentalen und insularen Klimate in Engler's 

 Botanische Jahrbiicher II. Leipzig 1881. 8. pp. 1 — 50. Nachtrag mit Kart pp. 

 177—184. 



Ueber Wechsell agerung und deren mutmaasliche Bedeutung fiir die Zeitrech- 

 nung der Geologie und fiir die Lehre von der Verdnderung der Arten in Biologisches 

 Centralblatt III n. 14-15, pp 418—434 et 449 — 461. Erlangen 1883. 8. 



Ueber die ivahrscheinliche Ursache der periodischen Verdnderungen in der Stdrke 

 der Meeresstrdmungen in Biologisches Centralblatt IV n. 2. pp. 33 — 48. Erlan- 

 gen 1884. 8. 



If we examine the meteorological charts of Norway we 

 observe at once what a great influence the sea and the moun- 

 tains exercise over the climate in various parts. Nearly all the 

 climatological lines nm more or less with the shape of the 

 coast, so that we encounter far greater variations when pro- 

 ceeding from the centre coastwards than from south to north. 

 In keeping with the same are the variations of the flora. 



The plants of Norway may be divided into certain groups 



1* 



