New Trade Publications Received The following literature descriptive of up-to-date methods and equipment for water works and fire departments has just been issued for general distribution and can be procured by writing to the concern mentioned: Aero Alarm Company. Seattle, Wash. — .Aero Bulletin. 4 pages, illustrated. Fulton Iron Works Company, St. Louis. Mo.—“Fulton Diesel Oil Engines,” catalogue, 32 pages and cover, illustrated. Northern Fire Apparatus Company, Minneapolis, Minn.— “Theories and Facts Regarding Rotary Pumps,” pamphlet, pages and cover, with inset line diagrams of pumps.