456 PHYSICAL GEOGRAPHY OF THE SEA, AND ITS METEOROLOGY. ' 



in another; and those between 140° E. and 80° W. in another, 

 with the following results :— (They are all on the polar side of 

 lat. 40° S.) 



Mean Height of the Barometer, as observed hetiveen 



857. Discussion of observations. —The instruments used for 

 these observations were for the most part the old-fashioned 

 marine barometer, to which no corrections have been applied. 

 The discrepancies of this table evidently arise from the lack of 

 number sufficient to mask these sources of error, or from the in- 

 fluence of the land, and not from any difference as to the mean 

 height of the barometer along the same parallels at sea in any one- 

 of the three divisions. In this discussion, the observations of 

 each gi'oup and every band were arranged according to the 

 month. ^ These monthly tables are not repeated here, but they da 

 not indicate any decided change in the barometric pressure in 

 high southern latitudes according to the season. The barometer 

 there stands low the year round. 



S6S. Barometric curve at sea.— liesorting to the graphic method 

 and using the table (above) for the purpose, the barometric curve 

 of the diagram (Plate XVI.) has been projected from pole ta 

 pole. 



859. Ditto over the laiid. —Professor Schouw has given us the 

 mean height of the barometer for 32 places on the land between 

 the parallels of 33° S. and 75° 30' N. They afford materials 

 for the annexed diagram, and show the exceptional character 

 of the meteorological influences which rule on shore when com- 



