444 EF. Loomis—Barometric Gradient m great storms. 
The gradients can generally be measured satisfactorily from 
the lowest isobar up to the isobar 775 or 780. In order to ex- 
tend the comparison still further, I selected the cases in which 
the barometer was highest and the isobars were tolerably sym- 
metrical, and measured the distance between the isobars, con- 
tinuing the measurements downward until the winds became 
feeble and the isobars irregular. For the convenience of those 
who may wish to examine a few of the most remarkable cases, 
without being compelled to search through the entire series of 
charts I will give the following examples: 
For Low Barometer. For High Barometer. 
1875; Jan. .-12. 1875, Dee. 30. 
Dec... 21. A 
sy 22. 1876, Jan. 1. 
1876, Jan. 22. eae f 
March 9. Hila: 
LO, 
The following table exhibits the average results for the 
Atlantic Ocean deduced from an examination of 81 cases 
treated in the manner already described. 
* 
TABLE I.—ATLANTIC OCEAN. - 
\ f - : " ~ ” py ais if 
Isobars. | Dee’ | nia. sepooty: Misn.| centes, _—— He| @ 14” 1 0.|¢ ie 
Es: Deg.| Deg. | Deg. | Myr’m.| Deg. 13 nite 
715 to 720/1°199/4°17/3°35|15°90/25°4| +2-07| 2°489| 276°6/58-0| 3°12 1-06 2°75)4°25 
20 “ 725|1-292/3-87|3-40|16-21|/26°5| 2°17] 3-735] 415-0/57°6/2°91| [378/253 39 
725 * %30/1°348/3°7113°39/ 16-14) 27°9 2°17) 5°055| 561°7/57-2| 2°76 3°59) 2°39 37 
“ 735)/1°389/3-60|3°38) 16-08) 29°9 2°19| 6-423) 713°7|/56°8| 2°70 35 1/2°30 dy 
735 “ 740|1-420/3-52/3°39116-14/31-9| 2°34| 7°828| 869°8/56-4|2°70| __|3°51/2°25)3°4 
40 * 745/1:449/3°45/3-41|16°27/33-°3 2°69| 9°262/1029°1)55°9| 2°71 3°52) 2°23 ood 
745 “ 750/1°484/3°37|3-41|16°27|33-7| 3-16} 10°729)1192°1/55°5| 2°69 3°50) 2°20 3" 
750 ‘+ 755/1°543/3°2413-34/15-84/34°1| 3°52 /12°242/1360°2| 55-0) 2°60) 3°38)2°12 de 
755 “ 760/1°613/3°10/3°16/14°73/34°8 3°84./13°820)1535°5| 54:5| 2°40) 3+12/1°95/3 
onl. Ue 
760 “ 765/1°695/2°95/2°77/12°69|36°9| + 1°63/13°835/1537°2/54°0|1-90/2°01 2°73 1°61 ae 
765 ‘ %70|1-818/2-75/2°39\10°95140°'T|— 3°99/12°079)1342°1)53°4) 1°77)1 8'7\2°54| 1°42 fie 
770 “ 775|1-976|2°53|2-14| 9-80|44-4|— 9°01|10-182|1131-3| 52-9) 1-71|1°81)/2-46)1-29)2°%0 
775 ‘* 780\2-165/2°31\1'89| 8°67/47°9|—13°65| 8-111) 901°2)52°2)1°64)1°74 2°37\ 1°16 2 ‘ 
780 “ 785)2°370/2°1111°70| 7-82'50°6|/—18-09| 5°844| 648-°7/51 5) 1°57/1°68|2°28 1°07 3 
785  790|2°604/1-99/1-52) 7-02/52°1|—22°40| 3°35%| 373°0|50°7)1-42)1°58)2°15 org7\1 
‘ oe ine 
ing values; column 4th shows the average velocity of the 
e 
