THE

LONDON ENCYCLOPÆDIA.

VOL. XXI.

SPHEROID TO TEWKESBURY.

G

THE

LONDON ENCYCLOPÆDIA,

11

OR

UNIVERSAL DICTIONARY

OF

SCIENCE, ART, LITERATURE, AND PRACTICAL MECHANICS,

COMPRISING A

POPULAR VIEW OF THE PRESENT STATE OF KNOWLEDGE.

ILLUSTRATED BY

NUMEROUS ENGRAVINGS, A GENERAL ATLAS,

AND APPROPRIATE DIAGRAMS.

Sic oportet ad librum, presertim miscellanei generis, legendum accedere lectorem, ut solet ad consiniuni conviva civilis.
Convivator annititur omnibus satisfacere; et tamen si quid apponitur, quod hujus aut illius palato non respondeat, et hic et ille
urtsane dissimulant, et alia fercula probant, ne quid contristent convivatorem.

Erasmus.
A reader should sit down to a book, especially of the miscellaneous kind, as a well-behaved visitor does to a banquel. The
master of the feast exerts himself to satisfy his guests; but if, after all his care and pains, something should appear on the table
that does not suit this or that person's taste, they politely pass it over without notice, and commend other dishes, that they inay not
distress a kind bost.

Translatim.

BY THE ORIGINAL EDITOR OF THE ENCYCLOPÆDIA METROPOLITANA,

ASSISTED BY EMINENT PROFESSIONAL AND OTHER GENTLEMEN.

IN TWENTY-TWO VOLUMES,

VOL. XXI.

LONDON:

PRINTED FOR THOMAS TEGG, 73, CHEAPSIDE;
SOLD BY N. HAILES, PICCADILLY; E. WILSON, ROYAL EXCHANGE ; J. MASON, CITY ROAD;

BOWDERY & KERBY, OXFORD STREET:
GRIFFIN & co. GLASGOW: J. CUMMING, DUBLIN : M. BAUDRY, PARIS : F. FLEISCHCH, LEDSIC :
AND WHIPPLE & LAWRENCE, SALEM, NORTH AMERICA.

1829.