It has been interesting to note in studying this particular disease of mankind the rapid progress made in developing methods of its control. In reviewing the work of those men who worked untiringly to discover the cause of tuberculosis and some method of control we pause and pay tribute to them. Most of the science we learn today represents the accumulation of discoveries painstakingly explored by pioneers. These pioneers left theories and facts that enabled the present day explorer in science to reach new facts and conclusions that are valuable. By retraveling some of the trails with these pioneers in the field and obtaining a historical viewpoint we will be able to appreciate more truly their struggles and work.