—— in Hull 100 —— in York 101 —— in Dumfries, etc. 102 —— in Nottingham and Glasgow 103 —— in Paris and Newcastle-upon-Tyne 104 Limited inquiry respecting the effect of the water supply at Newcastle 107 Assent of the medical profession to the influence of polluted water on the mortality from cholera 109 True explanation of this influence 110 Answers to certain objections 111 Circumstances connected with the history of cholera explained by the principles advocated in this treatise, as,— The duration of the epidemic in each place usually bears a direct relation to the number of the population 115 The effect of season on the prevalence of cholera 117 Proportion of the sexes who die of cholera at different periods of an epidemic, and under different circumstances 119 Proportion of deaths from cholera in certain occupations 121 Evidence that plague, yellow fever, dysentery, and typhoid fever are communicated in the same way as cholera 125 Instances in which ague was caused by impure water 129 Measures required for the prevention of cholera and other diseases which are communicated in the same way 133 Appendix, containing a list of the deaths from cholera which were registered in the four weeks ending 5th August 1854, together with the water supply of the houses in which the fatal attacks took place, in all the sub-districts to which the supply of either the Southwark and Vauxhall or the Lambeth Water Company extends 138 MAPS. Map 1. Showing the deaths from cholera in Broad Street, Golden Square, and the neighbourhood, from 19th August to 30th September 1854. A black mark or bar for each death is placed in the situation of the house in which the fatal attack took place. The situation of the Broad Street Pump is also indicated, as well as that of all the surrounding Pumps to which the public had access. Map 2. Showing the boundaries of the Registrar-General’s districts on the south side of the Thames in London, and also the water supply of those districts. ON THE MODE OF COMMUNICATION OF CHOLERA.