Dayton, Ohio company that built a water-cooled, vertical, in-line, four-cylinder engine during 1912.

-It had 301 cubic inches of displacement giving 50 HP.

-It used Mea magnetos and the cylinders had rotary valves.

From Appendix 10: The engine of the Mead Engine Company shown at the 1912 Aero Show. It gave 50 HP of power.

“Mead engine with rotary valves”