A Moment in Monrovia History: Monrovia's Solar Heater Company

1923 advertisement for Day & Night Solar Heater Co., William J. Bailey owner. One of Monrovia's largest employers.. See full details here. From the Myron Hotchkiss collection.

For more historic photos and papers, see the Monrovia Historical Society’s complete Legacy Project collection here. Learn more about the Monrovia Historical Society here.

- Brad Haugaard