DEDUCTIONS AND REMARKS. 133 



4. Out of two hundred and fifty-one stations in North America, east of the Mis- 

 sissippi, and situated M'ithin this belt, all but six have the mean direction of the 

 wind westerly. (See Plates VIII. and IX.) These six are Iloulton in Maine, 

 Salisbury in Connecticut, Redhook and Poughkeepsie in New York, Meadville in 

 Pennsylvania, and Xa Grange College in Alabama, and it is noticeable that three 

 of these places, viz. Salisbury, Redhook, and Poughkeepsie, are within thirty-five 

 miles of each other, and in a region which Plate III. shows to be characterized by 

 strong local disturbances, while La Grange College is located near the limit which 

 divides the westerly from the equatorial winds, and, moreover, the mean direction 

 of its winds was computed from only eight months' observations — a period too short 

 to be relied on. So that the only undoubted and unexplained exceptions are Houl- 

 ton and Meadville. Out of the 245 stations, at which the mean direction is west- 

 erly, at all but 14 it is from some point between N. W. and S. "W., and at 210 of 

 them it is within 35° of a due west point, as may be seen by the following state- 

 ment : — 



Within 5° of due west, 39 stations; viz. 15 on the north side and 24 on the south side. 



" 37 " 



" 55 " 



" 72 « 



" 89 " 



" 106 " 



" 120 " 



126 " 



" 131 " 



The 14 exceptions among the westerly directions are as follows: — 



Within 50° of due west, 5 stations; viz. on the north side and 5 on the south side. 

 " 55 " 8 " 1 " 7 



" 60 " 10 "2 " 8 



" 65 " 12 "4 " 8 



" 75 " 13 " 4 " 9 



" 80 " 14 "5 "9 



It is worthy of notice that, in all these exceptions,^ the rate of progress is small, 

 and, as a general fact, the farther the mean direction at any place deviates from the 

 ordinary direction in the region where that place is situated, the less is the pro- 

 gressive motion ; a fact that will be apparent by inspecting Plates VII. to X., and 

 noticing the shortness of the irregular arrows. Thus, the average rate for all the 

 251 stations mentioned above is 30 per cent., while for the 14 exceptions among 



' The winds at Toronto (one of these fourteen exceptions, and the greatest of them all) are very re- 

 markable, and deserve special notice, as they were observed hourly, or bi-hourly, both by day and by night, 

 for two years, with the utmost care, and with the most perfect instruments. And yet, the results are 

 widely at variance with those which we find elsewhere in the same region, the mean direction being, as 

 stated in the Table, N. 10° 23' W., and the rate of progress only 6 per cent.; both indicating the exist- 

 ence of some powerful disturbing influence there. It is true that this result has reference only to time, 

 but if we make the computation from the distance actually travelled, though it in some measure relieves 

 the difficulty, it by no means removes it, as will be shown hereafter. 



10 



" 



70 



" 



33 



15 



" 



100 



ti 



45 



20 



" 



132 



it 



60 



25 



" 



159 



it 



70 



30 



" 



186 



it 



80 



35 



it 



210 



it 



90 



40 



a 



222 



tt 



96 



45 



ti 



231 



it 



100 



