91. Properties of Ammonia, 111 92. Uses--Officinal and other Preparations, 111, 112 93. Statistics of Poisoning by Ammonia, 112 94. Poisoning by Ammonia Vapour, 112 95. Symptoms--Illustrative Case, 112, 113 96. Chronic Effects of the Gas, 113 97. Ammonia in Solution--Action on Plants, 113 98. Action on Human Beings and Animal Life--Local Action on Skin-- Action on the Blood--Time of Death, 113-115 99. _Post-mortem_ Appearances, 115 100. Separation of Ammonia--Tests, 115, 116 101. Estimation of Ammonia, 116 VI. CAUSTIC POTASH AND SODA. 102. Properties of Potassium Hydrate, 116, 117 103. Pharmaceutical Preparations, 117 104. Carbonate of Potash, 117 105. Bicarbonate of Potash, 117 106. Caustic Soda--Sodium Hydrate, 117, 118 107. Carbonate of Soda, 118 108. Bicarbonate of Soda, 118 109. Statistics, 118 110. Effects on Animal and Vegetable Life, 118, 119 111. Local Effects, 119 112. Symptoms, 119 113. _Post-mortem_ Appearances, 119-121 114. Chemical Analysis, 121 115. Estimation of the Fixed Alkalies, 121, 122 VII. NEUTRAL SODIUM, POTASSIUM, AND AMMONIUM SALTS.