[Sidenote: Household industry in America] [Sidenote: Recent changes in number of factories] 3. _In the last half century the unit of organization in leading industries has tended to grow larger._ Seventy-five years ago a tool-using household industry, on farms and in homes where the greater part of the things used were produced in the family, was still the typical organization in the United States. The early factories growing out of the household industry were small. A family specialized in producing cloth and exchanged with its neighbors; so with shoes, candles, soap, canned goods, cured meats, etc. Since that time two counter forces have been at work to affect the ratio of manufacturing establishments to population. The number of establishments has been increased by specialization of farming which has called for many industries to produce the things once made on farms, and by increasing wealth and invention, which has made possible many small industries supplying things before almost unknown. The number of establishments has been diminished as the staple products that can be transported have come to be made in larger factories. The resultant of these movements during the thirty years ending in 1900 is somewhat surprising: the ratio of factories (with an output worth five hundred dollars) to population has somewhat increased. In 1870 there were two hundred and fifty-two thousand establishments; in 1890, three hundred and fifty-five thousand, and in 1900, five hundred and twelve thousand, a ratio to population of one to one hundred and sixty-two, one hundred and seventy-seven, and one hundred and forty-four respectively. The last date was one of great industrial prosperity, and doubtless many ephemeral enterprises had been called into existence, thus giving a somewhat abnormal result. Moreover, there has been a large increase in the number of things made in factories which were formerly made in the homes, and which then did not appear at all in the census of manufactures. [Sidenote: Large production in some industries]