the
southern transit. The precedent southerly wind, the _central
condensation_, the appearance of lightning, and the rotation of the wind
by both the east and west, but most frequently by west, are the same. In
his chapter on observations at the Bermudas, he gives us many examples.
Probably the existence of the Gulf Stream to the west and north has a
modifying influence upon them, and their action becomes less intense in
that latitude, but they are very similar. I copy a record of the weather,
for a month, which may be found on pages 252, 253, and 254, and a portion
of his remarks:

"The month of December, 1839, presents a continual succession of
revolving winds passing over the Bermudas, with scarcely an
irregularity, as regards the fall and rise of the barometer
accompanying the veering of the wind. One, however, occurred on the
10th and 11th. The S. W. wind abated, and changed to W. N. W., with
the barometer still falling. But in the column of remarks it is noted
that there was lightning seen in the N. and N. W., from 7 P.M.,
during the night. This irregularity may, therefore, have been
occasioned by a gale passing over the banks of Newfoundland,
influencing the direction of the wind at Bermuda.

"REVOLVING WINDS.

+-----------------------------------------------------------------+
| Date. | Hour. |Direction of| Wind's | Weather. | Bar.|Ther.|
| | | Wind. | Force. | | | |
|--------|---------|------------|--------|-----------|------|-----|
| 1839. | | | | | | |
|Nov. 30 |Midnight.| S. S. E. | 1 |b. c. | 30.06| 65 |
|Dec. 1 | Noon. | S. S. W. | 3 |b. c. | 30.07| 71 |
| 2 | " | S. W. | 5 |g. m. q. | 29.86| 70 |
| 3 | " | S. S. W. | 3 |g. c. | 29.76| " |
| 4 | " | S. W. | 6 |g. m. r. | 29.62| 68 |
| 5 | " | W. N. W. | 5 |p. q. | 29.56| " |
| 6 | " | N. W. | 6 |p. q. |*29.55| " |
| 7 | " | N. N. W. | 5 |b. c. | 29.78| 70 |
| " |Midnight.| N. N. W. | 3 |b. c. | 29.89| 68 |
| 8 | Noon. | W. N. W. | 2 |b. c. | 29.82| 71 |
| 9 | " | S. S. W. | 5 |p. q. | 29.84| 70 |
| 10 | " | S. W. | 2 |b. c.