Dr. Caspar, of Berlin, in his late very interesting work on the duration of human life, has given the following conclusions:

Medium longevity.
Clergymen 65
Merchants 62
Clerks 61
Farmers 61
Military men 59
Lawyers 58
Artists 57
Medical men 56

The results of the other classes, with respect to their united ages, and the average of each, are—

Average.
Moral philosophers united ages 1417 70
Sculptors and painters 1412 70
Authors on law and jurisprudence 1394 69
Medical authors united ages 1368 68
Authors on revealed religion 1350 67
Philologists 1323 66
Musical composers 1284 64
Novelists and miscellaneous authors 1257 62½
Dramatists 1249 62
Authors on natural religion 1245 62
Poets 1144 57

This calculation was made most probably in Prussia.

Dr. Caspar’s view of longevity are not only highly interesting but, if correct, may lead to many important conclusions. He maintains that—

1. The female sex enjoys, at every period or epoch of life, except at puberty, at which epoch the mortality is greater among young females—a greater longevity than the male sex.

2. Pregnancy and labour occasion, indeed, a considerable loss of life, but this loss disappears or is lost in the general mass.

3. The so-called climacteric periods of life do not seem to have any influence on the longevity of either sex.

4. The medium duration of life at this present time (1835), is in Russia, about 21 years; in Prussia, 29; in Switzerland, 34; in France, 35; in Belgium, 36; and in England, 38 years.