"First, I do believe that if improperly and incautiously given, and in some rare idiosyncrasies, ether and chloroform may prove injurious or even fatal--just as opium, calomel, and every other powerful remedy and strong drug will occasionally do. Drinking cold water itself will sometimes produce death. 'It is well known,' says Dr. Taylor, in his excellent work on Medical Jurisprudence, 'that there are _many_ cases on record in which cold water, swallowed in large quantity and in an excited state of the system, has led to the destruction of life.' Should we therefore never allay our thirst with cold water? What would the disciples of Father Mathew say to this? But, secondly, you and others have very unnecessary and aggravated fears about the dangers of ether and chloroform, and in the course of experience you will find these fears to be, in a great measure, perfectly ideal and imaginary. But the same fears have, in the first instance, been conjured up against almost all other innovations in medicine and in the common luxuries of life. Cavendish, the secretary to Cardinal Wolsey, tells us in his life of that prelate, that when the cardinal was banished from London to York by his master--that regal Robespierre, Henry the Eighth--_many_ of the cardinal's servants refused to go such an enormous journey--'for they were loath to abandon their native country, their parents, wives, and children.' The journey which can _now_ be accomplished in six hours was considered then a perfect banishment.... In his Life of Lord Loughborough, John Lord Campbell tells us that when he (the biographer) first travelled from Edinburgh to London in the mail-coach the time had been reduced (from the former twelve or fourteen days) to three nights and two days; 'but,' he adds, 'this new and swift travelling from the Scots to the English capital was wonderful, and I was gravely advised to stop a day at York as several passengers who had gone through without stopping had died of apoplexy from the rapidity of the motion' ('Lives of the Lord Chancellors'). Be assured that many of the cases of apoplexy, &c., &c., alleged to arise from ether and chloroform, have as veritable an etiology as this apoplexy from rapid locomotion, and that a few years hence they will stand in the same light in which we now look back upon the apoplexy from travelling ten miles an hour. And as to the supposed great moral and physical evils and injuries arising from the use of ether and chloroform, they will by and by, I believe, sound much in the same way as the supposed great moral and physical evils and injuries arising from using hackney coaches, which were seriously described by Taylor, the water-poet, two or three centuries ago when these coaches were introduced. Taylor warned his fellow-creatures to avoid them, otherwise 'they would find their bodies tossed, tumbled, rumbled, and jumbled' without mercy. 'The coach,' says he, 'is a close