Table of Contents


THE

SUBTERRANEAN WORLD.

LONDON: PRINTED BY

SPOTTISWOODE AND CO., NEW-STREET SQUARE

AND PARLIAMENT STREET

Section0002.jpg

CARBONIFEROUS FOREST, CARBONIFEROUS PERIOD.

THE
SUBTERRANEAN WORLD.

BY

DR. GEORGE HARTWIG,

AUTHOR OF

‘THE SEA AND ITS LIVING WONDERS,’ ‘THE TROPICAL WORLD,’ ‘THE POLAR WORLD,’

AND ‘THE HARMONIES OF NATURE.’

WITH THREE MAPS AND NUMEROUS ENGRAVINGS ON WOOD.

NEW YORK:

SCRIBNER, WELFORD, AND CO.

1871.

PREFACE.

 

Nature displays her wonders not only in the starry heavens or in the boundless variety of animal and vegetable life on the surface of our earth. In the dark regions underground she likewise shows us much that is remarkable or beautiful, or carries on gigantic operations, which are sometimes beneficent and sometimes disastrous to mankind.

There lie concealed the mysterious laboratories of fire, which reveal to us their existence in earthquakes and volcanic explosions. There, in successive strata, repose the remains of extinct animals and plants. There many a wonderful cavern may be seen, with its fantastic stalactites, its rushing waters, and its noble halls. There have been deposited the rich stores of mineral wealth—the metals, the coals, the salt, the sulphur, &c.—without whose aid man would never have been more than a savage.

The aim of the present work has been to describe the wonders of this hidden world in their various relations to man, now raising him to wealth, and now dooming him to destruction.

The author trusts that he may have succeeded in giving a sketch of the phenomena resulting from the action of subterranean forces, which, with his account of the wonders of the sea, of the tropics, and of the frozen regions, may impart to the reader a fair idea of the history and present condition of the wonderful world in which we live.

Salon, near Ludwigsburg:

July 6, 1871.

CONTENTS.

 

CHAPTER I.

GEOLOGICAL REVOLUTIONS.

The Eternal Strife between Water and Fire—Strata of Aqueous Origin—Tabular View of their Chronological Succession—Enormous Time required for their Formation—Igneous Action—Metamorphic Rocks—Upheaval and Depression—-Fossils—Uninterrupted Succession of Organic Life

Page 1

CHAPTER II.

FOSSILS.

General Remarks—Eozoon Canadense—Trilobites—Brachiopods—Pterichthys Milleri—Oldest Reptiles—Wonderful Preservation of Colour in Petrified Shells—Primæval Corals and Sponges—Sea-lilies—Orthoceratites and Ammonites—-Belemnites—Ichthyosaurus and Plesiosaurus—Pterodactyli—Iguanodon—Tertiary Quadrupeds—Dinotherium—Colossochelys Atlas—Megatherium—Mylodon—Glyptodon—Mammoth—Mastodon—Sivatherium Giganteum—Fossil Ripple-marks, Rain-drops, and Footprints—Harmony has reigned from the beginning

8

CHAPTER III.

SUBTERRANEAN HEAT.

Zone of invariable Temperature—Increasing Temperature of the Earth at a greater Depth—Proofs found in Mines and Artesian Wells, in Hot Springs and Volcanic Eruptions—The whole Earth probably at one time a fluid mass

31

CHAPTER IV.

SUBTERRANEAN UPHEAVALS AND DEPRESSIONS.

Oscillations of the Earth’s Surface taking place in the present day—First ascertained in Sweden—Examples of Contemporaneous Upheaval and Depression in France and England—Probable Causes of the Phenomenon

34

CHAPTER V.

SUBTERRANEAN WATERS AND ARTESIAN WELLS.

Subterranean Distribution of the Waters—Admirable Provisions of Nature—Hydrostatic Laws regulating the Flow of Springs—Thermal Springs—Intermittent Springs—The Geysir—Bunsen’s Theory—Artesian Wells—Le Puits de Grenelle—Deep Borings—Various Uses of Artesian Wells—Artesian Wells in Venice and in the Desert of Sahara

39

CHAPTER VI.

VOLCANOES.

Volcanic Mountains—Extinct and active Craters—Their Size—Dangerous Crater-explorations—Dr. Judd in the Kilauea Pit—Extinct Craters—Their Beauty—The Crater of Mount Vultur in Apulia—Volcanoes still constantly forming—Jorullo and Isalco—Submarine Volcanoes—Sabrina and Graham’s Island—Santorin—Number of Volcanoes—Their Distribution—Volcanoes in a constant state of eruption—Stromboli—Fumaroles—The Lava-lakes of Kilauea—Volcanic Paroxysms—Column of Smoke and Ashes—Detonations—Explosion of Cones—Disastrous Effects of Showers of Ashes and Lapilli—Mud Streams—Fish disgorged from Volcanic Caverns—Eruptions of Lava—Parasitic Cones—Phenomena attending the Flow of a Lava Stream—Baron Papalardo—Meeting of Lava and Water—Scoriæ—Lava and Ice—Vast Dimensions of several Lava Streams—Scenes of Desolation—Volcanoes considered as Safety-valves—Probable Causes of Volcanoes

53

CHAPTER VII.

DESTRUCTION OF HERCULANEUM AND POMPEII.

State of Vesuvius before the eruption in the year 79 A.C.—Spartacus—Premonitory Earthquakes—Letter of Pliny the Younger to Tacitus, relating the death of his uncle, Pliny the Elder—Benevolence of the Emperor Titus—Herculaneum and Pompeii buried under a muddy alluvium—Herculaneum first discovered in 1713

81

CHAPTER VIII.

GAS SPRINGS AND MUD VOLCANOES.

Carbonic-acid Springs—Grotto del Cane—The Valley of Death in Java—Exaggerated Descriptions—Carburetted Hydrogen Springs—The Holy Fires of Baku—Description of the Temple—Mud Volcanoes—The Macaluba in Sicily—Crimean Mud Volcanoes—Volcanic Origin of Mud Volcanoes

88

CHAPTER IX.

EARTHQUAKES.

Extent of Misery inflicted by great Earthquakes—Earthquake Regions—Earthquakes in England—Great Number of Earthquakes—Vertical and Undulatory Shocks—Warnings of Earthquakes—Sounds attending Earthquakes—Remarkable Displacements of Objects—Extent and Force of Seismic Wave Motion—Effects of Earthquakes on the Sea—Enormous Waves on Coasts—Oscillations of the Ocean—Fissures, Landslips, and shattering Falls of Rock caused by Earthquakes—Causes of Earthquakes—Probable Depth of Focus—Opinions of Sir Charles Lyell and Mr. Poulett Scrope—Impressions produced on Man and Animals by Earthquakes

97

CHAPTER X.

THE GREAT EARTHQUAKE OF LISBON.

A dreadful All Saints’ Day—The Victims of a Minute—Report of an Eye-witness—Conflagration—Banditti—Pombal brings Chaos into Order—Intrigues of the Jesuits—Damages caused by the Earthquake in other places; at Cadiz; in Barbary—Widespread Alarm—Remarks of Goethe on the Earthquake

114

CHAPTER XI.

LANDSLIPS.

Igneous and Aqueous Causes of Landslips—Fall of the Diablerets in 1714 and 1749—Escape of a Peasant from his living Tomb—Vitaliano Donati on the Fall of a Mountain near Sallenches—The Destruction of Goldau in 1806—Wonderful Preservation of a Child—Burial of Velleja and Tauretunum, of Plürs and Scilano—Landslip near Axmouth in Dorsetshire—Falling in of Cavern-roofs—Dollinas and Jamas in Carniola and Dalmatia—Bursting of Bogs—Crateriform Hollows in the Eifel

121

CHAPTER XII.

ON CAVES IN GENERAL.

Their various Forms—Natural Tunnels—The Ventanillas of Gualgayoc—Eimeo—Torgatten—Hole in the Mürtschenstock—The Trebich Cave—Grotto of Antiparos—Vast Dimensions of the Cave of Adelsberg and of the Mammoth Cave—Discovery of Baumann’s Cave—Limestone Caves—Causes of their Excavation—Stalactites and Stalagmites—Their Origin—Variety of Forms—Marine Caves—Shetland—Fingal’s Cave—The Azure Cave—Cave under Bonifacio—Grotta di Nettuno, near Syracuse—The Bufador of Papa Luna—Volcanic Caves—The Fossa della Palomba—Caves of San Miguel—The Surtshellir

133

CHAPTER XIII.

CAVE RIVERS.

The Fountain of Vaucluse—The Fontaine-sans-fond—The Katabothra in Morea—Subterranean Rivers in Carniola—Subterranean Navigation of the Poik in the Cave of Planina—‘The Stalactital Paradise’—The Piuka Jama

149

CHAPTER XIV.

SUBTERRANEAN LIFE.

Subterranean Vegetation—Fungi—Enormous Fungus in a Tunnel near Doncaster—Artificial Mushroom-beds near Paris—Subterranean Animals—The Guacharo—Wholesale Slaughter—Insects in the Cave of Adelsberg—The Leptodirus and the Blothrus—The Stalita tænaria—The Olm or Proteus—The Lake of Cirknitz—The Archduke Ferdinand and Charon—The Blind Rat and the Blind Fish of the Mammoth Cave

156

CHAPTER XV.

CAVES AS PLACES OF REFUGE.

The Cave of Adullam—Mahomet in the Cave of Thaur—The Cave of Longara—The Cave of Egg—The Caves of Rathlin—The Cave of Yeermalik—The Caves of Grenada—Aben Aboo, the Morisco King—The Caves of Gortyna and Melidoni—Atrocities of French Warfare in Algeria—The Caves of the Dahra—The Cave of Shelas—St. Arnaud

169

CHAPTER XVI.

HERMIT CAVES—ROCK TEMPLES—ROCK CHURCHES.

St. Paul of Thebes—St. Anthony—His visit to Alexandria, and death—Numerous Cave Hermits in the East—St. Benedict in the Cave of Subiaco—St. Cuthbert—St. Beatus—Rock Temples of Kanara—The Wonders of Ellora—Ipsamboul—Rock Churches of Lalibala in Abyssinia—The Cave of Trophonios—The Grotto of St. Rosolia near Palermo—The Chapel of Agios Niketas in Greece—The Chapel of Oberstein on the Nahe—The repentant fratricide

178

CHAPTER XVII.

ICE CAVES AND WIND-HOLES.

Ice-caves of St. Georges and St. Livres—Beautiful Ice-stalagmites in the Cave of La Baume—The Schafloch—Ice Cataract in the Upper Glacière of St. Livres—Ice Cavern of Eisenerz—The Cave of Yeermalik—Volcanic Ice-caves—Æolian Caverns of Terni—Causes of the low temperature of Ice-caves

192

CHAPTER XVIII.

ROCK TOMBS AND CATACOMBS.

Biban-el-Moluk, the Royal Tombs of Thebes—The Roman Catacombs—Their Extent—Their Mode of Excavation—Touching Sepulchral Inscriptions—Antony Bosio, the Columbus of the Catacombs—The Cavaliere di Rossi—The Catacombs of Naples and Syracuse—The Catacombs of Paris

202

CHAPTER XIX.

CAVES CONTAINING REMAINS OF EXTINCT ANIMALS.

The Cave Hyena and the Cave Bear—The Cavern of Kirkdale—The Moa Caves in New Zealand—Various Species of Moas—Their enormous size

213

CHAPTER XX.

SUBTERRANEAN RELICS OF PREHISTORIC MAN.

The Peat Mosses of Denmark—Shell-Mounds—Swiss Lacustrine Dwellings—Ancient Mounds in the Valley of the Mississippi—The Caves in the Valley of the Meuse—Dr. Schmerling—Human Skulls in the Cave of Engis—Explorations of Sir Charles Lyell in the Cave of Engihoul—Caverns of Brixham—Caves of Gower—The Sepulchral Grotto of Aurignac—Flint Implements discovered in the Valley of the Somme—Gray’s Inn Lane an ancient Hunting-Ground for Mammoths

221

CHAPTER XXI.

TROGLODYTES OR CAVE-DWELLERS. CANNIBAL CAVES.

Cave Dwellings in the Val d’Ispica—The Sicanians—Cannibal Caves in South Africa—The Rock City of the Themud—Legendary Tale of its Destruction

232

CHAPTER XXII.

TUNNELS.

Subterranean London—The Mont Cenis Tunnel—Its Length—Ingenious Boring Apparatus—The Grotto of the Pausilippo—The Tomb of Virgil

237

CHAPTER XXIII.

ON MINES IN GENERAL.

Perils of the Miner’s Life—Number of Casualties in British and Foreign Coal Mines—Life in a Mine—Occurrence of Ores—Extent and Depth of Metallic Veins—Mines frequently discovered by Chance—The Divining Rod—Experimental Borings—Stirring Emotions during their Progress—Sinking of Shafts—Precautions against Influx of Water—Expense—Shaft Accidents—Various Methods of working Mineral Substances—Working in Direct and Reverse Steps—Working by Transverse Attacks—Open Quarry Workings—Pillar and Stall System—Long Wall System—Dangerous Extraction of Pillars—Mining Implements—Blasting—Heroes in Humble Life—Firing in the Mine of Rammelsberg—Transport of Minerals Underground—Modern Improvements—Various Modes of Descent—Corfs—Wonderful Preservation of a Girl at Fahlun—The Loop—Safety Cage—Man Machines—Timbering and Walling of Galleries—Drainage by Adit Levels—Remarkable Adits—The Great Cornish Adit—The Georg Stollen in the Hartz—The Ernst August Stollen—Steam Pumps—Drowning of Mines—Irruption of the Sea into Workington Colliery—Hubert Goffin—Irruption of the River Garnock into a Mine—Ventilation of Mines—Upcast Shafts—Fire Damp—Dreadful Explosions—The Safety Lamp—The Choke Damp—Conflagrations of Mines—The Burning Hill in Staffordshire

244

CHAPTER XXIV.

GOLD.

The Golden Fleece—Golden Statues in ancient Temples—A Free-thinking Soldier—Treasures of ancient Monarchs—First Gold Coins—Ophir—Spanish Gold Mines—Bohemian Gold Mines—Discovery of America—Siberian Gold Mines—California—Marshall—Rush to the Placers—Discovery of Gold in Australia—The Chinaman’s Hole—New El Dorados—Alluvial Gold Deposits in California and Australia—Washing—Quartz-crushing

285

CHAPTER XXV.

SILVER.

Its ancient Discovery—Its Uses among the luxurious Romans—The Mines of Laurium—Silver Mines of Bohemia, Saxony, and Hungary—Colossal Nuggets—Silver Ores—Silver Production of Europe—Mexican Silver Mines—The Veta Madre of Guanaxuato—The Conde de la Valenciana—Zacatecas and Catorce—Adventures of a Steam Engine—La Bolsa de Dios Padre—The Conde de la Regia—Ill-fated English Companies—Indian Carriers—The Dressing of Silver Ores—Amalgamating Process—Enormous Production of Mexican Mines—Potosi—Cerro de Pasco—Gualgayoc—The Mine of Salcedo—Hostility of the Indians—The Monk’s Rosary—Chilian Mines—The Comstock Lode

297

CHAPTER XXVI.

COPPER.

Its valuable Qualities—English Copper Mines—Their comparatively recent Importance—Dreary Aspect of the Cornwall Copper Country—Botallack—Submarine Copper Mines—A Blind Miner—Swansea—Smelting Process—The Mines of Fahlun—their Ancient Records—Alten Fjord—Drontheim—The Mines of Röraas—The Mines of Mansfeldt—Lake Superior—Mysterious Discoveries—Burra Burra—Remarkable Instances of Good Fortune in Copper Mining

315

CHAPTER XXVII.

TIN.

Tin known from the most remote antiquity—Phœnician Traders—The Cassiterides—Diodorus Siculus—His account of the Cornish Tin Trade—The Age of Bronze—Valuable Qualities of Tin—Tin Countries—Cornish Tin Lodes—Tin Streams—Wheal Vor—A Subterranean Blacksmith—Huel Wherry, a Tin Mine under the Sea—Carclaze Tin Mine—Dressing of Tin Ores—Smelting—The Cornish Miner

332

CHAPTER XXVIII.

IRON.

Iron the most valuable of Metals—Its wide Diffusion over the Earth—Meteoric Iron—Iron very anciently known—Extension of its Uses in Modern Times—British Iron Production—Causes of its Rise—Hot Blast—Puddling—Coal Smelting—The Cleveland District—Rapid Rise of Middlesborough—British Iron Ores—Production of Foreign Countries—The Magnetic Mountain in Russia—The Eisenerz Mountain in Styria—Dannemora—Elba—The United States—The Pilot Knob—The Cerro del Mercado

345

CHAPTER XXIX.

LEAD.

Its Properties and extensive Uses—Alston Moor—Belgian Lead Mines—Galena in America—Extraction of Silver from Lead Ores—Pattinson’s Process—A great part of our wealth is due to the laboratory

364

CHAPTER XXX.

MERCURY.

Not considered as a true Metal by the Ancients—Its Properties and Uses—Almaden—Formerly worked by Convicts—Diseases of the Miners—Idria—Its Discovery—Conflagration of the Mine—Its Produce—Huancavelica—New Almaden

370

CHAPTER XXXI.

THE NEW METALS.

Zinc—The Ores, but not the Metal, known to the Ancients—Rapid increase of its Production—Chief Zinc-producing Countries—Platinum—Antimony—Bismuth—Cobalt and Nickel—Wolfram—Arsenic—Chrome—Manganese—Cadmium—Titanium—Molybdenum—Aluminium—Aluminium Bronze—Magnesium—Sodium—Palladium—Rhodium—Thallium

380

CHAPTER XXXII.

COAL.

The Age of Coal—Plants of the Carboniferous Age—Hugh Miller’s Description of a Coal Forest—Vast Time required for the Formation of the Coal-fields—Derangements and Dislocations—Faults—Their Disadvantages and Advantages—Bituminous Coals—Anthracites—Our Black Diamonds—Advantageous Position of our Coal-Mines—The South Welsh Coal-field—Great Central and Manchester Coal-fields—The Whitehaven Basin and the Dudley Area—Newcastle and Durham Coal-fields—Costly Winnings—A Ball in a Coal-pit—Submarine Coal Mines—Newcastle—View from Tynemouth Priory—Hewers—Cutting Machines—Putters—Onsetters—Shifters—Trapper-boys—George Stephenson—Rise of Coal Production—Probable Duration of our Supply—Prussian Coal Mines—Belgian Coal Mines—Coal Mines in various other countries—Maunch Chunck

390

CHAPTER XXXIII.

BITUMINOUS SUBSTANCES.

Formation of Petroleum—Enormous Production of the Pennsylvanian Wells—Asphalte used by the Ancients—Asphalte Pavements—The Pitch Lake of Trinidad—Jet—Its Manufacture in Whitby

426

CHAPTER XXXIV.

SALT.

Geological Position of Rock Salt—Mines of Northwich—Their immense Excavations—Droitwich and Stoke—Wieliczka—Berchtesgaden and Reichenhall—Admirable Machinery—Stassfurt—Processes employed in the Manufacture of Salt—Origin of Rock-salt Deposits

431

CHAPTER XXXV.

SULPHUR.

Sulphur Mines of Sicily—Conflagration of a Sulphur Mine—The Solfataras of Krisuvick—Iwogasima in Japan—Solfatara of Puzzuoli—Crater of Teneriffe—Alaghez—Büdöshegy in Transylvania—Sulphur from the Throat of Popocatepetl—Sulphurous Springs—Pyrites—Mines of San Domingo in Portugal—The Baron of Pommorão

441

CHAPTER XXXVI.

AMBER.

Various Modes of its Collection on the Prussian Coast—What is Amber?—The extinct Amber Tree—Insects of the Miocene Period inclosed in Amber—Formidable Spiders—Ancient and Modern Trade in Amber

449

CHAPTER XXXVII.

MISCELLANEOUS MINERAL SUBSTANCES USED IN THE INDUSTRIAL ARTS.

Alum—Alum Mines of Tolfa—Borax—The Suffioni in the Florentine Lagoons—China-clay—How formed?—Its Manufacture in Cornwall—Plumbago—Emery—Tripolite

458

CHAPTER XXXVIII.

CELEBRATED QUARRIES.

Carrara—The Pentelikon—The Parian Quarries—Rosso antico and Verde antico—The Porphyry of Elfdal—The Gypsum of Montmartre—The Alabaster of Volterra—The Slate Quarries of Wales—‘Princesses’ and ‘Duchesses’—‘Ladies’ and ‘Fat Ladies’—St. Peter’s Mount near Maestricht—Egyptian Quarries—Haggar Silsilis—The Latomiæ of Syracuse—A Triumph of Poetry

464

CHAPTER XXXIX.

PRECIOUS STONES.

Diamonds—Diamond Cutting—Rose Diamonds—Brilliants—The Diamond District in Brazil—Diamond Lavras—The great Russian Diamond—The Regent—The Koh-i-Noor—Its History—The Star of the South—Diamonds used for Industrial Purposes—The Oriental Ruby and Sapphire—The Spinel—The Chrysoberyl—The Emerald—The Beryl—The Zircon—The Topaz—The Oriental Turquoise—The Garnet—Lapis Lazuli—The Noble Opal—Inferior Precious Stones—The Agate-Cutters of Oberstein—Rock Crystal—The Rock-crystal Grotto of the Galenstock

477

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIST OF ILLUSTRATIONS.

MAPS.

Of the World, showing the distribution of Volcanoes and the

Districts visited by Earthquakes

to face page

60

Of Great Britain, showing the Coal-fields and chief Mining Districts

400

Of America, showing the Coal-fields and Mineral Districts

410

 

 

 

 

 

 

WOODCUTS.

PAGE

Carboniferous Forest

engraved by G. Pearson, to face title

Tabular Geological Profile of Strata with corresponding Fossils

engraved by G. Pearson

3

Aqueous Strata disturbed by Igneous Formations

”           ”

4

Ammonites Henleyi (Middle Lias)

from Haughton’s ‘Manual of Geology’

9

Trilobite

from Kemp’s ‘Phasis of Matter’

11

Magnified Eye of Trilobite

”           ”

11

Pterygotus acuminatus (Eurypterid)

from Haughton’s ‘Manual of Geology’

12

Spirifer princeps (Brachiopod)

”           ”

12

Pterichthys Milleri, restored (Old Red Sandstone of Scotland)

”           ”

14

Ventriculites, Fossil Sponge (Chalk)

”           ”

16

Siphonia costata, Fossil Sponge, (Green Sand, Warminster)

”           ”

16

Encrinus liliiformis (Muschelkalk, Germany)

”           ”

17

Pentacrinus briareus

”           ”

17

Marsupites ornatus (Chalk)

”           ”

18

Turrilites tuberculatum

”           ”

19

Restored Belemnite

”           ”

19

Ichthyosaurus communis

”           ”

20

Plesiosaurus dolichodeirus (British Museum—found in the Lias of Street, near Glastonbury)

from Haughton’s ‘Manual of Geology’

21

Glyptodon clavipes

”           ”

25

Diagram illustrating action of Syphon

engraved by G. Pearson

44

Section of an Intermittent Spring

”           ”

45

Geysirs of Iceland

”           ”

46

Porous Strata, Artesian Well sunk in the London Basin

”           ”

49

Middle and Valley Lake Craters, Mount Gambier, South Australia

from Wood’s ‘Australia’ to face page

53

Extinct Crater of Haleakala

from Webb’s ‘Celestial Objects’

57

Eruption of Vesuvius, Bay of Naples

engraved by G. Pearson, to face page

81

Mud Volcanoes of Trinidad

engraved by G. Pearson

94

Great Earthquake at Lisbon

engraved by G. Pearson, to face page

114

Axmouth Landslip

engraved by G. Pearson

128

Stalactital Cavern at Aggtelek: the Cave of Borodla

engraved by G. Pearson, to face page

133

Entrance to the Cave of Adelsberg

engraved by G. Pearson

137

Stalactital Cavern in Australia

from Wood’s ‘Australia’

141

Cave under Bonifacio

from Forester’s ‘Corsica’

145

Leptodirus Höchenwartii

engraved by G. Pearson

163

The Proteus anguinus

”           ”

165

Blind Fish (Amblyopsis spelæus)

”           ”

168

Indian Rock-cut Temple

engraved by G. Pearson, to face page

178

Rock Temples of Ajunta (general view)

engraved by G. Pearson

182

Lower Glacière of St. Livres

from Browne’s ‘Ice Caves’

193

Ice Streams in the Upper Glacière of St. Livres

”           ”

196

Entrance to the Glacière of St. Georges

”           ”

201

Gallery with Tombs

from Northcote and Brownlow’s ‘Roma Sotterranea’

206

Cave in Dream Lead Mine, near Wirksworth, Derbyshire

engraved by G. Pearson

216

Boring Machine in the Tunnel, Mont Cenis

{

taken from the ‘Illustrated
London News’
by permission

}

238

Boring Machine in the Second Working Gallery, Mont Cenis Tunnel

”           ”

239

Process of Boring

engraved by G. Pearson

251

Section of a Lead Mine in Cardiganshire

{

from Ure’s ‘Dictionary of Arts, Manufacture, and Mines’.

}

252

Part of a Colliery laid out in four panels

”           ”

255

General View of Mining Operations

engraved by G. Pearson

257

Tools used by Miners in Cornwall

{

from Ure’s ‘Dictionary of Arts, Manufactures, and Mines’

}

258

Conveyance of Minerals underground

engraved by G. Pearson

262

Miners descending Shaft in Owen’s Safety Cage

”           ”

265

Timbering of a Mine

{

from Ure’s ‘Dictionary of Arts, Manufactures, and Mines’

}

258

Transverse Sections of Walled Drain Galleries

”           ”

269

Drainage of a Mine by Adit Levels

”           ”

269

Safety Lamp

”           ”

280

Gold-washing in Australia

engraved by G. Pearson

292

Stamping Mill

from Ure’s ‘Dictionary of Arts, Manufactures, and Mines’

306

Grinding Mill

”           ”

307

The Botallack Mine, Cornwall

engraved by G. Pearson

317

St. Michael’s Mount, Cornwall

”           ”

333

Blast Furnace

from Ure’s ‘Dictionary of Arts, Manufactures, and Mines’

352

Pecopteris adiantoides

from Haughton’s ‘Manual of Geology’

391

Sphenopteris affinis

”           ”

391

Lepidodendron elegans

”           ”

392

Asterophyllites comosa

”           ”

392

Sigillaria oculata

”           ”

392

Calamites nodosus

”           ”

393

Coalbeds rendered available by elevation,

from ‘Our Coal and Our Coal Pits’

397

Section of Coal-field south of Malmesbury

{

from Ure’s ‘Dictionary of Arts, Manufactures, and Mines’

}

398

Coal-basin of Clackmannanshire

”           ”

403

Dudley Coal-field

from Howitt’s ‘Visits to Remarkable Places’

407

Shipping Coal

”           ”

412

Coal Hewers at Work

engraved by G. Pearson

415

Pitch Lake of Trinidad

engraved by G. Pearson, to face page

429

Insects and Vegetable Substances inclosed in Amber,

engraved by G. Pearson

452

Penrhyn Slate Quarry, North Wales

engraved by G. Pearson, to face page

469