It is a proof of the prosperity of a city when manufactories of so exclusive a character as the one before us not only exist but are handsomely sustained. Some five years ago Messrs. B. F. & D. H. Avery commenced the manufacture of the since celebrated Livingston County Plow. It was with difficulty that the prejudices of the agricultural community in favor of other instruments were overcome, but by dint of industrious exertion the plow slowly gained the confidence of the community until it now holds, in several of the Southern and Western States, the very first rank as a plow. It is worthy of notice, as a proof of the enterprise of this firm, that each year since it was first introduced they have been obliged to double the number of plows made the preceding year. A few months since Messrs. B. F. & D. H. Avery dissolved their firm and Mr. B. F. Avery has now sole charge of the establishment. He has recently made some valuable improvements upon his plow, which will make its utility still more general. The new plow is found excellent for after-cultivation, and in connection with the old one makes his stock of plows fully adequate to every variety of American soil. Mr. B. F. Avery has spent some twenty-five years in this species of manufacture, and his experience is alone a proof of the value of his invention. His business, though already very large, is growing rapidly every year. EDWARD HOLBROOK, MANUFACTURER OF CHEWING TOBACCO, CIGARS, &c. No. 474 MAIN STREET. This extensive tobacco factory, established some twelve years ago, is one of the most important in the city. It was commenced at a time when Kentucky manufactured tobacco found very little market in the cities of the United States, but has grown with astonishing rapidity and vigor. Mr. Holbrook is an old dealer in tobacco, and has acquired great sagacity in the selection of the article suited to the various departments of manufacture. His skill as a manufacturer is also worthy of notice. For many years he has been employed in testing the value of the various methods of producing the finest qualities of Chewing Tobacco, and has added many valuable improvements to the ordinary methods of manufacturing the article. By the industry and enterprise of this gentleman and his fellow tobacconists, the Louisville-made article has driven entirely out of market all the medium and lower brands of Virginia tobacco, and readily competes with even the higher brands of this favorite manufacture. The business of this factory is extended over a large surface of country. From the Lakes at the North to New Orleans, this tobacco is not only rapidly bought up, but is eagerly inquired for. Barker & Co., of Detroit, Mich., write to Mr. H.: "We have orders _daily_, which we cannot fill for want of your tobacco." Preston & Bros., of Evansville, write: "This tobacco gives good satisfaction." Twitty & Smith, of New Orleans, say: "We doubt not,