Canadian born mining engineer and businessman who introduced a number of metallurgical innovations in copper mining.

Father was a Scottish immigrant and important surgeon who was a member of the Royal College of Surgeons.

Persuaded Phelps, Dodge & Co. to purchase the Atlanta Mine in Bisbee in 1881.

It took Dr. Douglas two years to find productive ore and Bisbee nearly disappeared until then.

In consequence, Phelps, Dodge & Co. bought many more mines in the Bisbee Area including the Copper Queen Mine.

"These claims had huge deposits of high-grade ores that produced a virtual torrent of copper upon which the fortunes and growth of Phelps, Dodge Co. was based."

Developed the method to separate copper from sulfide.

Known for caring about the employees as much as the mining results.

Moved the Smelter Out of Bisbee to Eliminate Poisoning People and the Environment.

Noted for enhancing hospital care and religious services for the miners.

Stopped Merchant Price Gouging by Opening The Copper Queen Store, Later to Become the Phelps Dodge Mercantile.

The border city of Douglas, Arizona is named after him.

Dr. Douglas was president and general manager of multiple mining companies across the U.S. and in Mexico.

He helped develop over 400 miles of railroad in the southwest.

Constructed First Bisbee Railway Connecting to Tombstone.

Douglas was also president of the American Institute of Mining Engineers and president of the Quebec Literary and Historical Society.

Dr. Douglas is largely known as "The Father of Bisbee Mining".

Son, Walter Douglas took over executive duties upon Dr. Douglas' retirement.

Had once managed an insane asylum.