12 E. Loomis—Resulis from an examination of the 
days, or the change was. less than 0°05 inch. A second class 
included those cases in which the pressure at the center de- 
creased to the extent of at least 0:05 inch; and a third class 
included those cases in which the pressure increased to the 
extent of atleast 0°05 inch. The following is the result of this 
comparison including 194 cases for eleven months of observa- 
tions. 
Influence of variations of barometric pressure. 
| AMOUNT OF RAIN-FALL. 
Within | Within 
No.of} Barom. Variation isobar isobar Greatest - 
cases. | at centre. | in 24 hours. 29°90. 29°80, fall. 
Pressure increasing, A5 29°58 +°100 “069 078 0°65 
“ stationary, 81 29°56 —"005 “120 “149 0°86 
x decreasing, 68 29°48 — 128 134 "159 1°02 
Column 2d shows the number of cases of each of the three 
classes of storms investigated ; column 8d shows the average pres- 
sure at the center of the storms under investigation ; column 4th 
shows the average change of pressure at the center of the storm 
in twenty-four hours, + increasing, — diminishing ; column 5th 
shows the average rain-fall for eight hours at all the stations 
included within the isobar 29°90 ; column 6th shows the average 
rain-fall at the stations within the isobar 29°80; and column 7th 
shows the average obtained by taking the greatest rain-fall re- 
or each storm at any of the stations. This greatest 
Stationary storms near the coast of Newfoundland. 
In a former article (vol. xi, p. 17) I have noticed the fact that 
! aie 
n unusual precipitation of vapor in that vicinity. 
The vapor is furnished by the warm water of the Gulf Stream, 
and the high-lands near the coast afford facilities for its precipt- 
