Excerpt from Progressive Problems in Physics The problems are numerous, giving to both elementary and col lege preparatory classes ample material for drill, for review, and for the assignment of different home lessons to divisions doing the same work. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

To combat behavior they viewed as sexually promiscuous, politically undesirable, or downright criminal, social activists in Progressive-era New York employed private investigators to uncover the roots of society’s problems. New York Undercover follows these investigators—often journalists or social workers with no training in surveillance—on their information-gathering visits to gambling parlors, brothels, and meetings of criminal gangs and radical political organizations. Drawing on the hundreds of detailed reports that resulted from these missions, Jennifer Fronc reconstructs the process by which organizations like the National Civic Federation and the Committee of Fourteen generated the knowledge they needed to change urban conditions. This information, Fronc demonstrates, eventually empowered government regulators in the Progressive era and beyond, strengthening a federal state that grew increasingly repressive in the interest of pursuing a national security agenda. Revealing the central role of undercover investigation in both social change and the constitution of political authority, New York Undercover narrates previously untold chapters in the history of vice and the emergence of the modern surveillance state.

. Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone when struck resists. If its resistance is greater than the force of the blow struck, it remains outwardly unchanged. Otherwise, it is shattered into smaller bits. Never does the stone attempt to react in such a way that it may maintain itself against the blow, much less so as to render the blow a contributing factor to its own continued action. While the living thing may easily be crushed by superior force, it none the less tries to turn the energies which act upon it into means of its own further existence. If it cannot do so, it does not just split into smaller pieces (at least in the higher forms of life), but loses its identity as a living thing. As long as it endures, it struggles to use surrounding energies in its own behalf. It uses light, air, moisture, and the material of soil. To say that it uses them is to say that it turns them into means of its own conservation. As long as it is growing, the energy it expends in thus turning the environment to account is more than compensated for by the return it gets: it grows. Understanding the word "control" in this sense, it may be said that a living being is one that subjugates and controls for its own continued activity the energies that would otherwise use it up. Life is a self-renewing process through action upon the environment.