Commercial Tests And How To Use Them is a book written by Sherwin Cody and published in 1919. The book is designed to help individuals and businesses understand the importance of testing and measuring various aspects of their operations in order to improve efficiency and profitability. The author provides detailed information on a wide range of tests, including those related to sales, advertising, customer service, and employee performance. The book also includes practical advice on how to conduct tests, interpret results, and use the data to make informed decisions. Overall, Commercial Tests And How To Use Them is a valuable resource for anyone looking to optimize their business practices and achieve greater success.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.