William Henry, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ It is important that the public should understand that the evolution of a method which will probably be the means of saving thousands of lives has resulted from the painless sacrifice of less than 40 dogs, a number which would doubtless in any case have been destroyed by drowning or some other form of suffocation, but without the benefit of the anaesthetics which were employed in the experiments. ”
