13.
| |May 14. | | |
-----+---------+------------+------------+------------+----------
| | | | |
1823 |April 10.|April 23. |Nov. 1, |April 24. |Sp. 21-2.
| | |light. | |Ice 23.
-----+---------+------------+------------+------------+----------
| | | | |Oct. 21.
1824 |April 14.|April 30. |Nov. 7. |May 5. |hard
| | | | |freeze.
-----+---------+------------+------------+------------+----------
| | |Dec. 11, |Feb. 22. |Oct. 2-3.
1825 |Mar. 16. |April 3. |3 inches. |Next. |27th, ice.
| | | |Ap. 20, ice.|
-----+---------+------------+------------+------------+----------
| |April 10. |Nov. 25, |May 7, |Sept. 23,
1827 |Mar. 25. |full size |light. |light. |light.
| |April 30. | | |
-----+---------+------------+------------+------------+----------
| | |Nov. 12, | |
1829 |April 24.|April 27. |4 inches. |Not noted. |Sept. 17.
| | |sleet. | |
-----+---------+------------+------------+------------+----------
| |begin Ap. | | |
1830 |April 1. |5. f. size | | |
| |May 1. | | |

These observations, upon a comparison with the same parallels of
latitude in the eastern states, show that there is no material
difference of climate between the two sections of our country, except
that produced by local causes, as mountainous districts, contiguity to
the ocean, &c.

A similar error has existed in relation to sudden and extreme changes of
weather in the West. People who emigrate to a new country have their
curiosity awakened, and perhaps for the first time in their lives become
quite observing of such changes. From habitually observing the weather
the impression is produced on their minds that there is a marked
difference in this climate. Dr. Rush declares that there is but _one_
steady trait in the character of the climate of Pennsylvania--and that
is, _it is uniformly variable_, and he asserts that he has known the
thermometer fall 20 deg. in one hour and a h