The Chemical History of a Candle
Faraday, Michael, 1791-1867
English
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THE CHEMICAL
HISTORY OF A CANDLE
A COURSE OF LECTURES DELIVERED BEFORE A JUVENILE
AUDIENCE AT THE ROYAL INSTITUTION
BY
MICHAEL FARADAY, D.C.L., F.R.S.
EDITED BY
WILLIAM CROOKES, F.C.S.
A NEW IMPRESSION, WITH ILLUSTRATIONS
LONDON
CHATTO & WINDUS
1908
PREFACE
From the primitive pine-torch to the paraffin candle, how wide an
interval! between them how vast a contrast! The means adopted by man to
illuminate his home at night, stamp at once his position in the scale of
civilisation. The fluid bitumen of the far East, blazing in rude vessels
of baked earth; the Etruscan lamp, exquisite in form, yet ill adapted to
its office; the whale, seal, or bear fat, filling the hut of the Esquimaux
or Lap with odour rather than light; the huge wax candle on the glittering
altar, the range of gas lamps in our streets,--all have their stories to
tell. All, if they could speak (and, after their own manner, they can),
might warm our hearts in telling, how they have ministered to man's
comfort, love of home, toil, and devotion.
Surely, among the millions of fire-worshippers and fire-users who have
passed away in earlier ages, _some_ have pondered over the mystery of
fire; perhaps some clear minds have guessed shrewdly near the truth. Think
of the time man has lived in hopeless ignorance: think that only during a
period which might be spanned by the life of one man, has the truth been
known.
Atom by atom, link by link, has the reasoning chain been forged. Some
links, too quickly and too slightly made, have given way, and been
replaced by better work; but now the great phenomena are known--the
outline is correctly and firmly drawn--cunning artists are filling in the
rest, and the child who masters these Lectures knows more of fire than
Aristotle did.
The candle itself is now made to light up the dark places of nature; the
blowpipe and the prism are adding to our knowledge of the earth's crust;
but the torch must come first.
Among the readers of this book some few may devote themselves to
increasing the stores of knowledge: the Lamp of Science _must_ burn.
"_Alere flammam._"
W. CROOKES.
CONTENTS.
LECTURE I.
A CANDLE: THE FLAME--ITS SOURCES--STRUCTURE--MOBILITY--BRIGHTNESS
LECTURE II.
BRIGHTNESS OF THE FLAME--AIR NECESSARY FOR COMBUSTION--PRODUCTION OF WATER
LECTURE III.
PRODUCTS: WATER FROM THE COMBUSTION--NATURE OF WATER--A COMPOUND--HYDROGEN
LECTURE IV.
HYDROGEN IN THE CANDLE--BURNS INTO WATER--THE OTHER PART OF WATER--OXYGEN
LECTURE V.
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