"Beechwood chips, sterilized in a cooker, are placed in the Anheuser-Busch Lagering Cellars (above). Here the beer ages, and "krausening," a costly second fermentation, produces Budweiser's natural carbonation and flavor."
"The 30-millionth barrel of beer produced by Anheuser-Busch, Inc. in 1974 was bunged at its St. Louis brewery Wednesday by August A. Busch Jr., right, chairman and chief executive officer, with an assist from President August A. Busch III, at left. The brief ceremony made Anheuser-Busch the first brewery in the world to produce 30 million barrels of beer in a single year."