Neiu PublkatioiiS. 203 



Chai*. II.— Ptwi^twt of Mineral arid Thermal Springs. — Sect. 1. Geography of 

 Mineral Springs. Europe and its Islands : Spain and Portugal ; France ; 

 the Alps and adjacent Countries; Black Forest, Baden, Wurtemberg, 

 Bavaria; Lower llhine, Eil'el, Nassau, Hartz; Bohemia and Er^gebirge, 

 Silesia ; Hungary ; North of Germany ; Italy ; Russia and Scandinavia ; 

 Iceland ; British Islands ; Mediterranean Islands. Asia and its Islands. 

 America and its Islands. Africa and its Islands.— Sect. 2. Topography of 

 Mineral Springs. Relations of Altitude to the Temperature of Springs. 

 Relations of Altitude to the Composition of Springs — Sect. 3. Geognosy of 

 Mineral Springs. Thermal Springs ; Connected with Active Volcanoes; un- 

 connected with Active Volcanoes; — Continent of Europe, European Islands, 

 Continent of Asia, Continent of America : General Inferences : Connection 

 between Earthquakes and Hot Springs. Cold Springs: Acidulous and 

 Alkaline Springs ; General Conclusions : Earthy, Sulphureous, and Chaly- 

 beate Springs : Saline and Brine Springs. General Conclusions. — Sect. 4. 

 Rocks formed by Mineral Springs. Calcareous : Structure, Colour, Com- 

 position, Position. Siliceous : Agent effecting the solution of the Silica. 

 Mechanical Deposits of Hot Springs : Disintegrating Agency of Mineral 

 Springs. Reflections on the former state of Mineral Springs, 116-268 



Chap. Ill Origin of Mineral and Thermal Springs — Sect. 1. Theories on 



the Origin of Mineral Springs. Actual sinking of Shafts ; from Subterra- 

 nean Fires ; Combustion of Iron-pyrites ; Combustion of Beds of Coal ; 

 from their Impregnating Minerals ; Theory of Compression ; Galvanic 

 Agency ; Creative Energies of the Earth — Sect. 2. Origin of the Water of 

 Mineral Springs. From Subterranean Reservoirs ; from the Atmosphere ; 

 from the focus of Volcanic Action ; from the Ocean or other masses of 

 Salt-Water. — Sect. 3. Origin of the Warmth of Mineral Springs. From a 

 general central cause of Heat: Proved by common Perennial Springs: 

 Proved by the Temperature in Mines : Of the Air, of Subterranean 

 Springs, of the Water of Draining Levels, of Subterranean Inundations, 

 of the Rock, of Artesian Wells. From ancient Volcanic Agency. From 

 modem Volcanic Operations — Sect 4. Origin of the Ingredients of Mineral 

 Springs. By Lixiviation, Sublimation, and Solution. From a general or 

 local cause. Of the Carbonic Acid. Of the Sulphurous and Sulphuric 

 Acids, and Sulphuretted Hydrogen. Of Muriatic Acid. Of Soda : 

 Phenomena of Natron Lakes : Origin of the Great Saliferous Deposits. 

 Of Lime and Magnesia; Iron, Silica; Potash; Iodine, Bromine, Li- 

 thion, Fluoric, and Phosphoric Acids. Nature of the Interior of the 

 Globe? 271-352 



Chap. IV Medicinal Virtuss of Mineral and Thermal Springs, — Sect 1. Ge- 

 neral Effects of the different Classes of Mineral Springs. Chalybeate 

 Waters : Oxide of Iron. Sulphureous Waters : Sulphuretted Hydrogen. 

 Acidulous Springs : Carbonic Acid. Purging Springs : Sulphates of Soda 

 or Magnesia. Saline and Brine Springs: Muriate of Soda. Alkaline 

 Springs : Carbonate of Soda—Sect. 2. Forms in which Medicinal Springs 

 are employed. Internal Use; Water-Bath; Affusion or Douche ; Vapour- 

 Bath — Sect. 3. Practical Directions for using INIedicinal Springs. Rules 

 for Drinking; Rules for Bathing; Hygienic and Dietetic Rules. 355-387 



