Frequent use has been made of some words spoken by the Home Secretary in Parliament, on July 24th, 1899. He was asked whether he would state what rules were laid down with regard to the granting or signing of certificates dispensing with the use of anæsthetics in experiments on animals; and whether there was any limit to the number of such certificates which one person might sign, or to the number of experiments upon different animals which might be performed by the person holding one such certificate. There can be no doubt as to the meaning of these questions. Certificate A, which is granted only for inoculation experiments or similar proceedings, and never for any serious cutting operation, dispenses wholly with anæsthetics. Certificate B, which is granted for any kind of operation _plus_ observation of the animal after operation, dispenses partly with anæsthetics; that is to say, the operation is done under an anæsthetic, and the subsequent observation of the animal, which is counted as part of the experiment, is made without an anæsthetic. The questions come to this: When the Home Office grants Certificate A, or Certificate B, what precautions does it take against any abuse of these certificates, and what restrictions does it impose on them? The Home Secretary answered: "It is the practice of the Home Office, in addition to the fact that all certificates expire on December 31st of the year in which they are granted, to limit the number, and this is always done in the case of serious experiments in which the use of anæsthetics is wholly or partly dispensed with."