comparison between the per-centage of alcohol to be found in a given number of samples of porter and stout, procured from what is termed brewers' taps, or agents, with that existing in a similar number of samples purchased of publicans, proves this fact in a very convincing manner. Dr. Hassall informs us that, with regard to the stouts,-- "The alcohol--of specific gravity 796, temperature 60° Fahr.--contained in the former samples ranged from 7·15 per cent. the highest, to 4·53 the lowest; whereas that of the stouts procured from publicans varied, with one exception, from 4·87 per cent. to 3·25 per cent." The same difference of strength also existed between the various samples of porter procured from the two sources; the amount of alcohol in that obtained from the taps varying from 4·51 per cent. to 2·42 per cent., whereas that purchased of publicans ranged from 3·97 per cent. to 1·81 per cent. The mixture of water, of course, reduces the colour, to bring up which both burnt sugar and molasses are extensively used; and, in order that "the appetite may grow with what it feeds on," tobacco and salt are copiously added by the publican. Beer, porter, and stout are also liable to be contaminated by the presence of lead. The universal use of pumping machines and the storing of the casks in the cellars, sometimes at a considerable distance from the bar, necessitates the use of long leaden pipes, in passing through which the liquid, if "stale" or sour, oxidates a portion of the lead. This fact is so well known both to public and publican, that the first pot or two drawn in the morning is generally set aside, as, from having lain all night in the pipe, it is justly considered injurious. The liberality of the barmaid in thus sacrificing a portion of the liquor is more apparent than real. The reader has, perhaps, noticed that most public-house counters are fitted up with metal tops, in which gratings are inserted to drain off all the spilt liquor, drainings of glasses, heel-taps of pots, &c.: down these gratings goes "the first draught," with its dose of oxide of lead. The receptacle below, which contains all this refuse together with that at the bottoms of barrels, the publican either returns to the brewer, or empties it himself into half-filled casks.