Maximum of Therm. 91, June 19. Maximum of Barom. 30.45, Nov. 29. Minimum " 3, Feb. 7. Minimum " 28.75, March 30. -- ----- Variation, 88 1.70 1824. Maximum of Therm. 90, June 8. Maximum of Barom. 30.45, Feb. 6. Minimum " 5, Feb. 2. Minimum " 28.90, Feb. 26. -- ----- Variation, 85 1.55 The amount of water which fell in rain and snow during the four years, from 1822 to 1825, inclusive, was, 1822. 1823. 1824. 1825. Inches, 35.20 | 42.54 | 50.38 | 33.26 | We next subjoin a summary of deaths by fever, erysipelas and measles, in the above period; being more desirous of narrating all the circumstances associated with the appearance and continuance of the small-pox, than of insisting on them as supporting causes or necessary connexions. It will appear from the accompanying statement, that the diseases febrile and eruptive were in number, violence and mortality unusually great, in the above mentioned years, as we discover by comparison with the returns for 1822 and 1825. Deaths by Fevers. Erysipelas. Measles. Small-pox. 1822 510 4 0 0 1823 758 24 156 160 1824 654 28 102 324 1825 375 12 38 6 In New York and Baltimore, the coincidence between increase of fevers, measles and erysipelas, and the mortality from small-pox, is not so well marked. In New York--Deaths by Fevers. Erysipelas. Measles. Small-pox. 1822 393[14] 6 1 0 1823 192[15] 13 117 18 1824 191[16] 14 100 394 1825 445 20 53 40 In Baltimore--Deaths by Fevers. Erysipelas. Measles. Small-pox. 1821 400 0 2 21 1822 430 1 4 122 1823 304 2 175 2 1824 183 3 14 2 1825 138 0 9 3 We now proceed to give a brief sketch of the disease called the natural small-pox, (occurring in persons unprotected by previous vaccination or inoculation,) and the deaths from which are given in the above statements. We must, in advance, insist on the great diversity in the appearance of the eruption in different individuals; so great, that an attempt to make an accurate picture of one case pass for a faithful representation of the many, must be deceptive and injurious.