By adding Greenhow Terrace to the streets partly supplied by the Company, and by including cases of cholera, fatal or otherwise, with those of mere diarrhœa, Mr. Main was able to show a result apparently in favour of the Company’s water. He was good enough, however, to send me a copy of his paper, which contains the details of the inquiry as far as it extended; and I found, on perusing it, that, leaving out Greenhow Terrace, which is not supplied by the Company at all, there was no case of cholera, either fatal or otherwise, and no case, even of approaching cholera, in any house which was not supplied with the Company’s water. All the deaths and all the cholera occurred in the houses having this water, whilst in the houses having only pump-water, there was simply diarrhœa. In the workhouse, supplied by the Water Company, and having five hundred and forty inmates, there were twelve cases of cholera, or approaching cholera, and seven deaths; whilst in the military barracks, supplied from wells on the premises, and having five hundred and nineteen inmates, although there was a good deal of harmless diarrhæa, there was no cholera, nor any case of approaching cholera. [Sidenote: CHOLERA AT MOSCOW.] The communication of cholera by means of the water is well illustrated by the instance of Moscow, which was severely visited by that disease in 1830; but much less severely in the second epidemic. Subsequently to 1830 the greater part of the town, which is situated to the north of the Moscow river, obtained a supply of excellent water, conducted in pipes from springs at a distance; and the cholera in 1847 was chiefly confined to those parts of the town which lie to the south of the river, to which the new supply of water did not extend, and where the people had still only impure river water to drink.[25] The above instances are probably sufficient to illustrate the widely-spread influence which the pollution of the drinking water exerts in the propagation of cholera. [Sidenote: DIFFUSION OF THE CHOLERA POISON IN WATER.]