172 



OBSEEVATIONS ON THE WINDS. 



(107.) "We extract the following from the work, premisiag that the charts 

 referred to have not been copied here. 



1. The Winds of the North Atlantic, betv^en Lat. SS'' and 40*^ N. 



We have made two Wind Charts dealing with the winds having a force 

 of to 9, Beaufort Scale, of which the first, constructed according to the 

 old system of Maury, contains the aggregate number of observations 

 collected by Maury, Andrau, and the Norddeutsche Seewarte (the Ham- 

 burg Meteorological Office), amounting to 55,710 observations, including 

 calms and variables. The second chart exhibits, partly numerically and 

 partly graphically, 16,653 observations, made specially in the routes of the 

 North German Lloyd steamers, during the eight years 1860 — 1867. From 

 the detailed information given in these charts we condense the masses of 

 figures into closer groups, and elucidate the relative frequency of occurrence 

 of any wind by means of per-centages. In the first place we give — 



^ — General Wind Table /or the North Atlantic, betiveen Lat. 55° d 40'^, 

 in the Yearly Period, and referred to Eight Points of the Compass. 



By adding one-half the intermediate points to each of the four adjacent 

 cardinal points (thus, W. = W. + ^ S.W. -\- * N.W.), we find that- 

 Westerly winds are 33 per cent. 

 Southerly ,, 23 ,, 



Northerly „ 22 



Easterly ,, 17 ,, 



Calms and Variables 5 ,, 



The "Westerly to Northerly winds are more certain to be found between 

 35° and 55° W. in higher latitudes, whilst the South to S.E'. winds will be 



