Robert Green Ingersoll (1898). “Lectures of Col. R.G. Ingersoll: Including His Letters on the Chinese God--Is Suicide a Sin?--The Right to One's Life--etc. Etc. Etc”
John Joseph Griffin (1834). “Chemical Recreations: A Series of Amusing and Instructive Experiments, which May be Performed with Ease, Safety, Success, and Economy ; to which is Added, The Romance of Chemistry : an Inquiry Into the Fallacies of the Prevailing Theory of Chemistry : with a New Theory and a New Nomenclature”, p.232