94. Construction of mantles. 95. Care of mantles. 96. Fixtures for burning gas. 97. Adjustment. 98. Care of lamps. 99. Lighting a gas light. 100. Cold-process gasoline gas. 101. Acetylene lamps. 102. Care of burners of acetylene lamps. CHAPTER XIV. KEROSENE LAMPS 93 103. Construction of kerosene lamps. 104. Management of kerosene lamps. 105. Lighting a kerosene lamp. 106. To extinguish a lamp. 107. Care of lamps. 108. Kerosene mantle lamps. CHAPTER XV. ALCOHOL AND GASOLINE LAMPS 96 109. Classification of lamps. 110. Gravity lamps. 111. Lighting the gravity lamp. 112. Pressure lamps. 113. Gasoline lamps with wicks. 114. Alcohol lamps with wicks. 115. Lighting alcohol or gasoline lamps. PART IV. COOLING DEVICES CHAPTER XVI. REFRIGERATORS 100 116. Principles of refrigeration. 117. The construction of refrigerators. 118. Lining refrigerators. 119. Insulation of refrigerators. 120. Circulation in refrigerators. 121. Drip from melting ice. 122. Arrangement of food in the ice box. 123. Filling and care of the ice box. CHAPTER XVII. ICELESS REFRIGERATORS; WATER COOLERS 105 124. Comparative efficiency of iceless refrigerators. 125. Iceless refrigerator. 126. Small cooler. 127. Covered pail. 128. Unglazed earthenware. 129. Cooling with running water. 130. Refrigerating plants. 131. Water coolers. 132. Care of water coolers. CHAPTER XVIII. FANS AND VENTILATORS 110 133. Selecting a fan. 134. The construction of the fan in common use. 135. Ventilator. PART V. WATER SUPPLY AND SEWAGE DISPOSAL CHAPTER XIX. PUMPS AND WATER FILTERS 112 136. Suction pumps. 137. Care of pumps. 138. Force pumps. 139. Compressed-air pumps. 140. Water filters. CHAPTER XX. PRESSURE TANKS; PLUMBING FIXTURES 117 141. Pressure tanks. 142. Construction of the pressure tank. 143. Care of pressure tanks. 144. Hot-water kitchen tank. 145. Instantaneous water heaters. 146. Heaters for tanks. 147. The elevated water tank. 148. Faucets. 149. Valves. 150. Overflows. 151. Traps for bath tubs and basins. CHAPTER XXI. CESSPOOLS, SEPTIC TANKS AND CITY SEWER SYSTEMS 124 152. Releative value of cesspool and septic tank. 153. Construction of the septic tank. 154. The size of tank. 155. Disposal of waste in cities. CHAPTER XXII. WATER CLOSETS 128 156. Construction of water closets. 157. Siphoning the trap. 158. The flushing tank. 159. Repairing the flushing tank. PART VI. LAUNDRY EQUIPMENT CHAPTER XXIII. WASHING MACHINES 132