CONTRIBUTIONS TO METEOROLOGY. 



51 



storm areas is thus a strong and porsistiiiit one, while tliat on tlie east side results from teniiuirary 

 causes ami eannot be loiisj- maintained. It oceasionally happens during a violent storm that the 

 east wiuds are stronger than the west winds. In such a case the low center may be pushed west- 

 ward, but such a result does not necessarily follow, for a large i)art of the air which pushes in on 



Table XXX. — Barometric minima advancing at least 1,000 miles in twenty-four hours. 



No. 



Date. 



1872. 



Nor. 6.-2 



24.2 



Dec. 14. 1 



19.1 



1873. 



Jan. 4.:i 



26. :5 



Fell. l.'i. :i 



May 12.2 



Nov. 3.3 



23.1 



24.1 



1874. 



Jan. 3. 3 



Feb. 6.2 



19.1 



22.1 



23.1 



Mar. 3.1 



18.2 



Apr. .'). 1 



Sept. 2. 1 



Nov. 28. 1 



Dec. 2.2 



13. 2 



16. 1 



23. 2 



27.2 



1875. 



Jan. 1.3 



1877. 



Jan. 1.1 



6.1 



7.3 



15.1 



19.1 



Mar. 1.2 



3.2 



6.2 



8.2 



15.3 



18.3 



20.2 



Oct. 28.1 



Nov. 1.1 



5.1 



' 8.2 



First station. 



Pembina. . 

 Keokuk .. 

 Onialia -.. 

 liidianola 



Mempliis 



Lake City .. . 



MempLis 



Saint Paul... 



Duluth 



Indiauola 



Pittsburgh .. 





Inch. 



29.45 



.62 



.67 



Sccoiul station. 



Portland . 

 Quebec... 

 Montreal 



Escanaba ... 

 Louisville . .. 



Duluth 



Indianola. . .. 

 Rochester . . . . 

 Leavenworth. 



Keokuk 



Saint Louis. . 

 Saint Paul. .. 



Mobile 



Marquette . .. 

 Cleveland .. . 



Omaha 



Marquette .. . 

 Bismarck 



Marquette .. . 



Saint Marks.. 



Mobile 



ludianola. . .. 

 Fort Gibson.. 



Bismarck 



Memphis, 



Indianapolis . 



Escanaba 



Cincinnati. .. 

 Dodge City. 

 Leavenworth 

 Saint Louis.. 

 Leavenworth, 

 San .\ntonio. 

 Indianapolis . 

 Toledo 



U Buftalo. 



.74 



.80 

 .59 

 .44 

 .49 

 .73 

 .48 



.31 



.82 

 .52 

 .89 

 .581 

 .29! 

 .63 

 .71 

 .89 

 30.15 

 29. 44 

 .83 

 .51 

 .49 

 .,59 



.94 



3 

 o 



Portland 



Halifax 



New London . . 



Portland 



Father Point. . . 

 Pittsburgh .... 

 Halifa.\ 28.82 



Inch 



29.12 



.39 



.51 



.43 



.33 

 .17 



.53 

 .35 

 .60 



.48 



.62 

 .84 

 .84 

 .45 

 .63 

 .56 

 .61 

 .59 



Father Point - 



Sydney 



Father Point. 

 Rochester . ... 

 Father Point . 



Ottawa 



Quebec 



Ottawa 



Father Point . 



Quebec 



Capi' Rozier. . 



Halifax 



Ottawa 



Halifax 



Quebec 



Halifax . 



28.89! 1,170 



Boston 



Ne w York 



Eastport 



Malone 



Parry Sound.. 



Parr.v Sound.. 



Father Point.. 



Chatham 



16! Father Point.. 



. 56; Knoxville 



.66 Cape Henry... 



. 55 Malone 



. 56 Rocklilfe 



. .58 Erie 



.84 



.47 



Means 29.62 



Halifax . 

 Chatham 



29.55 

 .70 

 .70 

 .58 

 .47 

 .34 

 .19 

 .63 

 .72 

 .54 

 .64 

 .42 

 ..59 

 .37! 

 .59! 



Miles 

 1,376 

 1,214 

 1,132 

 1,295 



Change of 

 barometer in 



twenty-four 

 hours. 



c 



+0. .36 

 + .55 

 + .71 

 + .32 



1,215+ .54 

 1,404J+ .20 

 1,055+ .49 

 1,145+ .45 

 1,100+ .86 

 1,270+ .39 

 1,002- .09 



1,000+L07 

 1,212'+ .39 

 1,123!+ .46 



1,374 + 

 1, 0581+ 

 1,114{+ 

 1, 187 + 

 1,065 



—1.06 



— .68 



— .29 

 1.06 



.94 

 —1.04 

 .95 

 .24 

 .31 

 .80 

 —1.40 



+ 



1, 175 

 1,466 

 1.095 

 1, 092 

 1,065 

 1, 165 

 1,134 



29.35 

 .15 

 .37 



. 56 

 .19 

 .07 

 .52 

 .71 

 28.74 

 29.64 

 .87 



.11 



.50 

 .57 



55 

 95 

 74 



37[- 

 38!— 

 41 

 19 



+ 

 + 



+ .91 

 + .54 — 

 +L 08 

 + .61 

 + .79 



+ .11 



1,126 + 

 1,048 + 



1,872 + 

 1,270+ 

 1,080'+ 

 1, 003 + 

 1,178+ 

 1,0.55+ 

 1,0611+ 

 1,050 + 

 1.209;+ 

 1,047,+ 

 1,077+ 

 1, 122'+ 

 l,15l!+ 

 1,128 + 



.67- 



. 23 - 



. 561- 



.89 



.23 



.30 



.66 



.61 



.91 



.84 



.27 



.50 



.67 



. .52 



.67 



.69, 



.38 

 .01 

 .58 

 .66 

 .21 

 .49 

 .73 

 .55 

 .24 

 .81 

 .40 

 .85 

 .69 



- .37 



- .56 



-1.11 



- .67 

 -1.18 



- .01 



- .56 

 -1.03 



- .98 



- .15 



- .26 

 -1.38 



- .50 



- .34 



- .52 



- .54 



- .91 



- .83 



- .54 



29.42 



1,167+ .55— .65 



Rain in low. 



t3 



0.15 

 .02 

 .02 

 .36 



.36 



.19 

 .27 

 .04 

 .00 

 .24 

 .38 



.03 

 .16 

 .06 

 .24 

 .21 

 .16 

 .09 

 .12 

 .03 

 .17 

 .03 

 .11 

 .06 

 .03 

 .11 



.23 



.28 

 .31 

 .04 

 .23 

 .05 

 .24 

 .08 

 .09 

 .28 

 .08 

 .06 

 .13 

 .05 

 . as 

 .22 

 .43 



0.16 



0.02 

 .01 

 .00 

 .20 



.13 

 .05 

 .05 

 .01 

 .00 

 .14 

 .13 



.06 

 .10 

 .01 

 .21 

 .07 

 .14 

 .05 

 .03 

 .01 

 .14 

 .00 

 .04 

 .03 

 .02 

 .09 



.16 



.06 

 .08 

 .02 

 .07 

 .01 

 .05 

 .02j 

 .02 



Wind in low. 



9.49 



8.31 



12.27 



9.89 



9.16 



7.33 



7.73 



10.09 



12. 28 



7. 8i: 



14. 15! 



16.05 

 7.90 

 7.96 



7.47 



8,341 



10. 40; 



5. 8O: 



9.84! 



4.211 

 15. 66 

 14.33 



9.00 

 11.39 

 10.79 



9.26 



6.23 



13.92 

 13.63 



8.4' 

 10. 42 



9.05 

 12. OC 

 11.19 

 14.87 



.06'. 20. 10 



.03 

 .00 

 .03 

 .63 

 .11 

 .05 

 .11 



11.46 

 11.65J 

 10.481 

 11.30 

 9.48 

 14.25 

 17. 22 



12.39 

 12. 81 

 16.97 

 10. 33 



13. 52 

 9.22 



8.83 

 10.91 

 12. 30 

 11.20 

 10.98 



17.61 

 7.46 

 10.66 

 15.04 

 21.90 

 16.66 

 11.36 

 11.65 

 9.00' 

 15. 331 

 14.58 

 11.27, 

 15. 08, 



15. 80 

 7.88 



17.78 



14.08 

 11.62 



16. 49, 



17. 53, 

 15. 8rs' 

 13.79t 

 13.77 

 16.59 

 18.26 

 19. 93 

 13.92 

 12. 70 

 12.10 



9.87 

 14.44 

 13. 091 



a 





30.09 

 .33 

 .46 

 .3' 



.30 

 .92 

 .11 

 .02 

 .42 

 .12 

 .29 



.57 

 .22 

 .17 

 .72 



.82 

 .30 

 .13 

 .17 

 .42 

 .62 

 .35 

 .57 

 .73 

 .42 

 .55 



.54 



.73 

 .42 

 .40 

 .46 

 .30 

 .04 

 .36 

 .37 

 .43 

 .51 

 .19 

 .11 

 .41 

 .25 

 .,56 

 .54 



O.O61 10.761 13.78 30.39 



tbe east side rises from the earth's surface, while the air which pushes in on the west side does not 

 rise at all, or not to an equal extent. Thus the low area is filled up on the west side, and were 

 it not for the continued precipitatiou of vapor the low area would soon become obliterated. In 

 the .subsequent pages additional facts will be presented, showiug the unsatisfactory nature of the 

 drift theory. 



