ALLISON ON CANADIAN WEATHER TELEGRAPHY. 375 



this under discussion ; while I regret to say that the number of late 

 warning telegrams was also a similar share of the total. 



During February then, we had seven storms. By the wor^ 

 ** storm" I mean a gale of wind reaching at least a velocity of 20 

 miles per hour, for any one hour or more, accompanied by rain or 

 snow, or neither — the latter case being very rare. A velocity o^ 

 20 miles per hour equals a pressure of 2 lbs. per square foot ; as 

 the square of the velocity in miles per hour, multiplied by .005, 

 gives the pressure in lbs. per square foot, V^ X -005 = P. With 

 this pressure it is calculated in the Royal Navy that a ship close 

 hauled could just carry close reefs and courses. 



On the 3rd. ult., light snow began to fall early. A snow storm 

 began at noon ; wind S. E. 15 miles per hour. Gale began 8 p.m. 

 At 9 p.m. blew 21.5 miles per hour, and at midnight 30.7, having 

 backed to E. At IJ a. m. of 4th., wind reached its greatest rate 

 of 42 miles per hour; decreased gradually till 3 a. m., and at 4 

 o'clock lulled. Snow fell fast till 1 p. m., with slight flurries in 

 evening. From noon to 9 p. m. we had a very high wind from 

 N.W., not quite a gale, but the reverse of the cyclone. A warning 

 was sent from Washington but did not reach me till 4th, 11.35 

 a. m., 24 hours late. 



On the 10th another snow storm began 7.5 p. m., but not so 

 violent in any respect as the last. At midnight a N. E. wind was 

 blowing 14.3 miles per hour. At. 3 a. m. of 11th, 20 miles were 

 attained, and at same hour the snow ceased. Generally, after 

 backing a few points, gales veer, lull, and come out from opposite 

 quarter. They are cyclonic as the last mentioned. But in this 

 storm the wind continued moving through N. to N. W., and 

 finally to W. ; blowing strongly from N. W. between noon and 3 

 p. m. of 11th. Telegram received 11th, 1 p. m., or at least 18 

 hours late. 



At 1 a. m. of 14th, a S. gale was blowing at 20 miles per 

 hour — at 3 a. m., 21.2 per hour — at 6 a. m., 23.7 — at 9, 28.6 — 

 at 10, 27.1— at 11, 27— at noon, 26.7 from S. S. W., and at 3 

 p. m., had fallen again to 20 miles and quickly subsided. Light 

 rain fell in showers during the morning, and more heavy and con- 



