"The Girl in Industry" by Dorothy Josephine Collier is a sociological investigation written in the early 20th century. This book explores the physiological and health impacts of industrial work on adolescent girls, particularly those employed in various factories during the tumultuous times of World War I. It aims to provide insights into the challenges faced by younger female workers and addresses the conditions under which they labor. The book is divided into two main parts: Investigation and Recommendations. In the first part, Collier presents her findings based on interviews with factory workers, health officials, and welfare supervisors. She discusses the effects of long working hours, poor conditions, and the physical toll that industrial jobs take on young girls aged 14 to 18. Through qualitative data, she highlights issues such as fatigue, anaemia, and inadequate nutrition. In the second part, Collier makes specific recommendations for improving the working conditions for young women, advocating for shorter hours, better medical supervision, and accommodating work environments that support healthy development during a critical stage of life. Overall, the book offers a thoughtful reflection on labor and its impacts on the female workforce, calling for increased attention to the welfare of adolescent workers. (This is an automatically generated summary.)