Imperfectly mixed coal-tar-creosote dips are liable to poison animals even when not used in stronger solutions than that recommended by the manufacturers, and are also likely to be inefficacious.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
They had a temporary effect, but I found them equally inefficacious.
"Anna St. Ives"
Thomas Holcroft
The doctor shook his head, bore testimony to the evil, and confined himself to prescribing inefficacious treatments which were only, according to a celebrated saying, a long meditation on death.
"The Pros and Cons of Vivisection"
Charles Richet Commentator: W. D. Halliburton