12 £. Loomis—Results derived from an examination of the 
this case also there was an unusual precipitation of vapor on 
the west side of the center of low pressure, as is shown by the 
following table : 
Precipitation, April 30—May 3, 1874. 
30.1/ 30.2) 30.3) 1.1] 1.2] 1.3} 2.11 2.2] 2.3] 3-11] 3.2/Sum 
Montreal 06 "80 01 87 
Quebec 50 | -40/ 50} 30 10 1:80 
Chatham "21 | -02 12 | °06| °02; -31] -12}| -06} -04 96 
Cape Rosier | °21| -27| ‘Ol 10! -15} 40} -20} -20 1°54 
Sydney *34| -23 oY a a 
A still more remarkable example of the same kind occurred 
on the Atlantic Ocean in the winter of 1874-5. <A st 
the 80th of December, 1874, there was a low center (barometer 
28°7 inches) a short distance south of Greenland, with an area 
west (bar. 30°8). January Ist the low was ir stationary 
28°7), with a high on the east (bar. 30°5) and another low on 
the west (bar. 28°9) followed on the west side by a high (bar. 
305). January 4th the two low areas had blended into a sin. 
gle low area (bar. 28-9), and the center of least pressure was 
_ able to consider the great depression of January 4th to be the 
continuation of that of December 30th. January 5th the low 
