The stills in use to-day in many parts of the South for the production of whiskey are quite as simple as those above described, and some for the making of "moonshine" liquor are more so. The first distilling apparatus for the production of strong alcohol on an industrial scale was invented by Edward Adam, in the year 1801. The arrangement is shown in Fig. 9, in which _A_ is a still to contain the liquor placed over a suitable heater. The vapors were conducted by a tube into the egg-shaped vessel _B_, the tube reaching nearly to the bottom; they then passed out by another tube into a second egg _C_; then, in some cases, into a third, not shown in the figure, and finally into the worm _D_, and through a cock at _G_ into the receiver. The liquor condensed in the first egg is stronger than that in the still, while that found in the second and third is stronger than either. The spirit which is condensed at the bottom of the worm is of a very high degree of strength. At the bottom of each of the eggs, there is a tube connected with the still, by which the concentrated liquors may be run back into _A_ for redistillation after the refuse liquor from the first distill has been run off. [Illustration: FIG. 9.--Adam's Still.] In the tube is a stop-cock _a_, by regulating which, enough liquor could be kept in the eggs to cover the lower ends of the entrance pipes, so that the alcoholic vapors were not only deprived of water by the cooling which they underwent in passing through the eggs, but were also mixed with fresh spirit obtained from the vaporization of the liquid remaining in the bottom of the eggs, in the manner already described. Adam's arrangement fulfilled, therefore, the two conditions necessary for the production of strong spirit inexpensively; but unfortunately it had also serious defects. The temperature of the egg could not be maintained at a constant standard, and the bubbling of the vapors through the liquor inside created too high a pressure. It was, however, a source of great profit to its inventor for a long period, although it gave rise to many imitations and improvements.