A gas engine 179 48. Pump operated by belt 180 49. Duplex pump operated directly by steam 180 50. Raising water by means of compressed air 182 51. Wooden tank 183 52. Iron tank 185 53. Hand pump applied to air-tank 186 54. Engine applied to air-tank 187 55. Windmill connection with tank 188 56. Construction of a wooden tank 193 57. Hot-water attachment to the kitchen stove 195 58. Enameled iron sink 197 59. Enameled iron laundry tubs 198 60. Leveling the drain 200 61. Water-supply installation 202 62. A trap 204 63. Washout water-closet 205 64. Washdown water-closet 205 65. Syphonic closet 205 66. Syphon-jet closet 206 67. Sewage beds 217 68. Plan of sewage beds 220 69. Plan of subsurface irrigation field 224 70. Section of "Miller" syphon 226 71. Plan and section of a septic tank 227 72. Section of a septic tank with syphon chamber 229 73. Plan of sewage disposal for a single house 231 74. School girl with adenoids 289 75. Outdoor sleeping porch for tuberculous patients 343 76. Mortality from pulmonary tuberculosis 344 77. Spring infected by polluted ditch 356 RURAL HYGIENE CHAPTER I _VITAL STATISTICS OF RURAL LIFE_