Pyrotol was an explosive available for a time after World War I. It was reprocessed from military surplus. Usually used in combination with dynamite, it created an incendiary blast. Since it was very inexpensive, it was often used by farmers to remove tree stumps and clear ditches. The substance was known for being used to commit the Bath School bombing in 1927 and distribution of pyrotol for farm use was discontinued in 1928 due to exhaustion of the supply of surplus explosives.
- Virginia. Dept. of Agriculture and Commerce (1922). Yearbook 1922. Virginia Department of Agriculture and Commerce. p. 125. Retrieved December 16, 2012.
- Wool Production, Extension Bulletin #136(Issues 135-184). State College of Washington. April 1926. p. 74.
Pyrotol is a mixture of 60% smokeless powder, 34% sodium nitrate and 6% of 40% nitroglycerin dynamite.
- Buhk, Tobin T. (2011). True Crime : Michigan: The State's Most Notorious Criminal Cases. Stackpole Books. ISBN 978-0-8117-0713-8. Retrieved December 16, 2012.
- Gado, Mark. "Hell Comes to Bath". crimelibrary. Retrieved December 16, 2012.
- Schechter, Harold (2012). Psycho USA: Famous American Killers You Never Heard Of. Random House Digital, Inc. pp. 277–278. ISBN 978-0-345-52448-5.
- "Heavy Orders Cut Supply of Pyrtol". Granite Falls Record (Newspaper Archive of Granite Falls Historical Society, Granite Falls, Washington). September 30, 1927. Retrieved December 16, 2012.
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