"This is a companion book to _Your City_. I have gathered the same facts, so far as they are available, about 144 cities of 20,000 to 30,000 population in 1930 that were gathered for the larger cities. The general conclusions of the earlier book are amended Where they do not fit the smaller cities. But this happens very rarely. So there is space to present details concerning each item of welfare in convenient form for citizens to use in planning to improve life for themselves and their children. Teachers of sociology or of civics who have found _Your City_ useful as a presentation of the essentials of variation and correlation will find the treatment in this book even simpler and more dramatic."