The horror which was so lately expressed by the Emperor of Austria at the progress of Science, and at the revolution which Sir Humphry Davy had made in the science of Chemistry, is a specimen of that feeling which pervades all such men. This imbecile idiot quivered at an observation of his own physician about the state of his own constitution, and forbade him ever to use the word in his presence again! Yet it is by such men as this, that the inhabitants of Europe are held in a state of bondage and degradation! Will ye, Men of Science, continue to truckle before such animals? Will ye any longer bend the knee to such Baals--to such Golden Calves as these? Will ye bend your aspiring minds to prop the thrones of such contemptible, such ignorant, such brutish despots? Shame on you, if you can so far debase yourselves! Up, and play the man, boldly avow what your minds comprehend as natural truths; and all the venom of all the Despots and Priests on the face of the earth, shall fly before you as chaff before the wind. The science of Chemistry has so far explored the properties of matter in all its variety, and has so far ascertained all its powers, purposes, and combinations, as to banish the idea of its having been formed from any chaotic state into its present form and fashion. The Chemist would smile at such a notion in the present day, even if he feared to encounter the Priest and his dogmas about the world having been created out of nothing. Creation is an improper word when applied to matter. Matter never was created--matter never can be destroyed. It is eternal both as to the past and future. It is subject to a continual chemical analysis, and as continual a new composition. For a full comprehension of these assertions, it is necessary to have a knowledge of the elements of Chemistry: therefore, if any other person, but those to whom this letter is addressed, should read it, let him not hastily reject without a full consideration and enquiry. Mr. Parke's Chemical Catechism, or Dr. Ure's Chemical Dictionary, will explain all my assertions on the properties of matter. The elements of Chemistry have been published by a variety of other Chemists, to any of whom I would refer the reader, as it will not answer the purport of my address to enter into a fuller explanation on this important head, or to fill these pages with an elemental description of Chemistry.