A study of propaganda with an approach as studious as that of the scientist. A report on methods that have been devised to aid in detecting and analyzing the modern propaganda of our 20th century world. A summary of the power inherent in the correct use of language and the styles most effective in molding public opinion to certain desired lines; the problems mot in a quantitative method of analysis, the extremely complicated and well constructed methods needed for correct quantitative breakdown of language, and a few examples of the formulas developed in Communist propaganda since the 1917 Revolution. Many of the sections appeared earlier as part of the work done under the auspices of the War Communications Research Project. Designed for a specialized reading public.