Page:Popular Science Monthly Volume 88.djvu/203

 Popular Science Monthly

��175

��practical operation a n d care and preservation of these complicated engines keeps the recruit busy dur- ing the week.

For the fifth week, the subject is that of internal combustion engines. The study of the principles of these engines, and of special types such as the Hornsby-Akroyd, M e i t z and Weiss oil engines, is

������The navy offers an opportunity to study electrical engineering

thoroughly pursued, and the practical operation, care and preservation of all oil engines is taught.

In the sixth week, the theory of mag- netism and electricity is studied, and in the seventh week, the instructors teach the students the theory of the dynamo

��Bluejackets in artillery and infantry exercises ashore. Above, a school- room on shipboard

��and electro-magnetism.

Practical work on dynamos is ac- complished during the next two weeks, and pupils learn the mys- teries of turbo-generators, switch- boards, operating dynamos in par- allel, care of the plant and dynamo room routine.

Theoretical and practical work on motors occupy the recruits' time from the tenth to the twelfth week. Studies are made of the principles of di- rect current motors, motor generators and dynamos, and practical work is done on service motors and motor starting and controlling devices. Ammunition conveyors and hoists, gim elevating

�� �