P. W. & Co., in company with J. Wekerle, a practical organ builder, commenced the manufacture of these instruments in Louisville a little less than three years ago, since which time they have built several instruments for western churches, in Louisville and elsewhere. These have been pronounced by competent judges equal to any made in the country. Five workmen are constantly employed in this department. CHARLES DUFFIELD & CO.'S HAM CURING ESTABLISHMENT, Water Street, between 5th and 6th, Entrance on 6th. This is the largest establishment exclusively devoted to the curing of hams, not only in the United States, but in the world. The buildings are of brick and are three stories in height. The curing-house is 66 feet wide and 350 feet long, embracing over 52,000 square feet of floor. The smoking house is 35 feet in width by 65 in length, and will hold 40,000 hams at one smoking. One to two hundred thousand hams are cured here in one season, and thirty to fifty men are employed nearly six months in the year in preparing the hams for market and summer keeping. The details of the curing process are not made public. Mr. Duffield was the _first_ to establish and make permanent the business of ham curing, as a separate and distinct branch of the provision trade, which he did by _persevering_ in making fine hams for years without profit--and he has thus became the PIONEER in giving character to our western hams, which now stand unequalled in the markets of the United States. It is to this perseverance that we are indebted for all the fine hams, by whomsoever cured, that now fill our markets. Mr. Duffield was the _first_ to cure in Cincinnati, in 1835, as many as 20,000 hams, and from this _beginning_, the business is believed to have now reached the grand aggregate of from six to eight hundred thousand hams, cured in an _extra_ style, in all the western cities. Mr. D.'s hams, however, still stand pre-eminent. The demand for them increases yearly. His brand is, "DUFFIELD'S AMERICAN WESTPHALIA HAMS." The reason for the term "American Westphalia" is contained in the fact, that the only hams celebrated in the United States markets, when Mr. D. commenced curing, were those imported from Westphalia, in Germany, (which were then and still are sold at 25 and 30 cents per pound,) hence the propriety and boldness of the term "_American_ Westphalia." It is certain that Mr. Duffield's cure will not be found _inferior_ to the best _imported_ from Westphalia, and will not cost the consumer one-half the price of that article.