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THE

QUARTERLY JOURNAL,

July 1819.

ART. I. An Introductory Discourse, delivered in the Amphitheatre of the London Institution, on Wednesday, the 5th of May, 1819. By William Thomas Brande, Sec. R. S. and Professor of Chemistry in the Royal Institution of Great Britain.

I HAVE been honoured by the request of the Board of Management of this Institution, to deliver a course of lectures on the Principles of Chemical Science; and, highly as I am flattered by the distinction which they have thus deemed it right to confer upon me, I should feel uneasy and embarrassed, were I not, on this occasion, and at the very threshold of my undertaking, to assure you that I have acquiesced in their wish, under the impression of considerable diffidence, and a somewhat painful anxiety; that I had hoped and expected that a task so arduous and important, would have devolved upon an abler Professor, and would have been consigned to one of more eloquence and ability than the very humble individual who now stands before you, to plead the cause of science. I should, indeed, have altogether declined the office, and shrunk from its responsibility, had not experience already convinced me that candour and kindness would be the prevalent feeling of my audience, and that they would dispense these in direct proportion to my wants, if they find my exertions unremitting; my zeal unextinguishable; and my desire, limited only by my power to excel.

Under these impressions, I enter upon my design, not with fear and trembling, but with confidence and alacrity; rejoicing in the opportunity of shewing my zeal in the cause in which we are emVOL. VII.

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barking; and of conducting you, to the best of my abilities, into the enchanting realms of experimental science.

On account of many circumstances, which it is quite unnecessary to recur to, no attempt will be made, during the present season, to institute a regular series of philosophical or scientific instruction; to speak the truth, our means are inadequate to such an undertaking; our forces are scattered, and it will require time, and skill, and exertion, to marshal them into order, and to bring them, duly equipped, into the field: indeed, it is to the unremitting zeal and activity of your Board of Management, that such arrangements, in respect to apparatus and assistants, have been made, as enable me, upon the present occasion, to open my course with the most ample confidence that nothing will ever be wanting on their part, to furnish such auxiliaries and supplies with a liberal and discerning hand.

As chemical science will form a feature, and, I trust, a prominent one, of the various courses of information and instruction, that are to issue from this room, it shall be my earnest endeavour to lay before you, in simple, but perspicuous terms, the leading objects of that important and beautiful department of physical knowledge; to make you acquainted with some of its already atchieved conquests in the dominion of nature; and to expose some of the probable results of its future progress; and I propose to fulfil these intentions by an experimental inquiry into the powers and properties with which matter is endowed, and which, as it were, preside over its chemical energies, causing, modifying, or preventing them. These, I hope, will soon be rendered familiar to you under the heads of attraction, heat, and electricity, for such these powers are.

It shall be my great object to accomplish these ends in the most clear and perspicuous manner; to divest those branches of science that I am to deal with, of all abstruse and recondite terms; to destroy the fortification of hard words and hidden meanings with which they are sometimes surrounded; and to shew that they may really be brought home to the business and bosoms of men. But, before I proceed to any further remarks, or expatiate upon the particular objects and ends of my own department of know