[Sidenote: Basil Valentine introduces antimony.] The celebrated work of Basil Valentine, entitled "Currus triumphalis Antimonii," introduced the metal antimony into the practice of medicine. The attention of this author was first directed to the therapeutical relations of the metal by observing that some swine, to which a portion of it had been given, grew fat with surprising rapidity. There were certain monks in his vicinity who, during the season of Lent, had reduced themselves to the last degree of attenuation by fasting and other mortifications of the flesh. On these Basil was induced to try the powers of the metal. To his surprise, instead of recovering their flesh and fatness, they were all killed; hence the name popularly given to the metal, antimoine, because it does not agree with the constitution of a monk. Up to this time it had passed under the name of stibium. With a result not very different was the application of antimony in the composition of printer's type-metal. Administered internally or thus mechanically used, this metal proved equally noxious to ecclesiastics. [Sidenote: The new epoch.] It is scarcely necessary to continue the relation of these scientific trifles. Enough has been said to illustrate the quickly-spreading taste for experimental inquiry. I now hasten to the description of more important things. [Sidenote: Difficulty of treating it scientifically.] In the limited space of this book I must treat these subjects, not as they should be dealt with philosophically, but in the manner that circumstances permit. Even with this imperfection, their description spontaneously assumes an almost dramatic form, the facts offering themselves to all reflecting men with an air of surpassing dignity. On one hand it is connected with topics the most sublime, on the other it descends to incidents the most familiar and useful; on one hand it elevates our minds to the relations of suns and myriads of worlds, on the other it falls to the every-day acts of our domestic and individual life; on one hand it turns our thoughts to a vista of ages so infinite that the vanishing point is in eternity, on the other it magnifies into importance the transitory occupation of a passing hour. Knowing how great are the requirements for the right treatment of such topics, I might shrink from this portion of my book with a conviction of incapacity. I enter upon it with hesitation, trusting rather to the considerate indulgence of the reader than to any worthiness in the execution of the work.