----------+------------------------------------------------ | DEATHS FROM DIARRHŒAL DISEASES. |-----------+-----------+------------+----------- MONTH. | Under one | Under two | Under five | | year. | years. | years. | All ages. ----------+-----------+-----------+------------+----------- January | 50 | 55 | 58 | 82 February | 47 | 51 | 58 | 75 March | 75 | 80 | 83 | 96 April | 82 | 91 | 97 | 108 May | 101 | 117 | 121 | 104 June | 387 | 430 | 436 | 467 July | 809 | 990 | 1,020 | 1,100 August | 464 | 565 | 697 | 762 September | 267 | 394 | 409 | 462 October | 114 | 148 | 154 | 190 November | 59 | 70 | 72 | 89 December | 57 | 62 | 64 | 82 ----------+-----------+-----------+------------+----------- These statistics demonstrate the extreme unhealthfulness of New York during the summer, and the vast proportion of children who perish from the fatal agencies which are then brought into activity. It is a matter of great public concern to determine the nature of the unhygienic conditions on which this excessive mortality depends, and thus discover the proper remedial measures. As high temperature is the distinguishing feature of the summer months, we very naturally conclude that excessive heat is a most important factor, if not the sole cause, of the diseases so fatal to human life at this period. A close comparison of the temperature and mortality records of any summer in this city demonstrates the direct relation of the former to the latter. For illustration, we will take the records of the Health Department during the past summer, selecting diarrhœal diseases for comparison, as they prevail and are most fatal at that season of the year. The table gives the total mortality from these diseases and the mortality from those diseases of children under five years of age. To the four months, June, July, August, and September, are added May and October, for the purpose of showing the gradual increase of the mortality from these diseases as the hot weather approaches and its decline as the hot weather abates. Key: TF. = Temperature (Fahrenheit)