One of the problems in many of the larger of Ameri-ca's industries is the necessity of always having available a corps of carefully trained men to take positions which may become vacant and to fill new places, the establishment of which is made necessary by the growth of an industry. This is done by the apprentice system, by night schools, or by private or " works high schools." An example of the last mentioned of these methods in the lighting field is the School of Practice recently organized by the president of the Denver Gas and Electric Company, a school in which the students will be properly drilled in every branch of the gas and electric business.

The students in this school are to be only those who are the graduates of the highest technical schools and colleges in the country. Although all the students will have already completed various courses in engineering, yet their training will have been rather along theoretical lines, while the training afforded by this school will be a two years' course along practical lines. In addition to the technical subjects naturally embraced in this higher course, the students will be obliged to also study subjects connected with the commercial side of the lighting question, such as the best methods of selling gas and electricity, etc. It is expected that upon the completion of this two years' course that the students will be all-round lighting en-gineers, fitted to run a plant and sell its products.