Why are cart bolsters cut and wheel naves turned not from oak, but from birch? Bolsters and naves have to be strong, and oak is not more expensive than birch. Because oak splits lengthwise, and birch does not split, but ravels out. Because, though oak is more firmly connected than birch, it is connected in such a way that it splits lengthwise, while birch does not. Why are wheels and runners bent from oak and elm, and not from birch and linden? Because, when oak and elm are steamed in a bath, they bend and do not break, while birch and linden ravel in every direction. This is again for the same reason, that is, that the particles of the wood in the oak and in the birch are differently connected.
ISABEL F. HAPGOOD Boston, Sept. 1, 1887 ARTICLE ON THE CENSUS IN MOSCOW. [1882.] The object of a census is scientific. A census is a sociological investigation. And the object of the science of sociology is the happiness of the people. This science and its methods differ sharply from all other sciences. Its peculiarity lies in this, that sociological investigations are not conducted by learned men in their cabinets, observatories and laboratories, but by two thousand people from the community. A second peculiarity is this, that the investigations of other sciences are not conducted on living people, but here living people are the subjects. A third peculiarity is, that the aim of every other science is simply knowledge, while here it is the good of the people. One man may investigate a nebula, but for the investigation of Moscow, two thousand persons are necessary. The object of the study of nebulæ is...