ur in high northern latitudes, if a
storm should be raging very violently in a lower latitude on the
opposite side of the pole, the distance across the circle of 80d being
only about 1,400 miles. As the different vortices have a different limit
in latitude every year, the determination of this turning point is
obviously of great practical utility, as the fact may yet be connected
with other phenomena, so as to give us the probable character of the
polar ice at any assigned time. On this point we have more to say.

PASSAGES OF ALL THE VORTICES.

Our remarks have hitherto been confined to the central vortex. We shall
now show from the record, that the other vortices are as effective in
deranging the equilibrium of our atmosphere. In the following table we
have given the passages of the different vortices, which will serve as
their true positions within moderate limits, to calculate from, for all
future time.

PASSAGES OF THE CENTRAL AND LATERAL VORTICES, OBSERVED IN JUNE AND JULY,
1853, IN LATITUDE 41d 20' NORTH.

I signifying Inner; O, outer; C, central; A, ascending; D, descending.

____________________________________________________________________
| | | | | | |
| Order.|Vortex.| Date. | Meridian |Passage.| Calculated latitude |
| | | | Passage. | | and Remarks. |
|_______|_______|_________|__________|________|______________________|
| | | | | | |
| 1st | I. A. | June 22 | 7 A.M. | south | Centre. About 40d. |
| | | 23 | 8 A.M. | north | Warsaw. Storm. |
| 2d | O. D. | 27 | 0 noon | north | |
| | | 28 | 1 A.M. | south | See record. |
| 3d | C. A. | July 1 | 9 A.M. | south | |
| | | 2 | 10 A.M. | north | Lat. 43d. Storm. |
| 4th | I. D. | 7 | 5 P.M. | north | |
| | | 8 | 6 P.M. | south | Lat. New York. Storm.|
| 5th | C. D. | 12 | 5 P.M. | north | Aurora. |
| | | 13 | 6 P.M. | south | Stormy, very. |
| 6th | O. A. | 14 | 10 A.M. | south | |
| | | 15 | 11 A.M. | north | See Record. |
|_______|_______|_________|__________|__