THE

LONDON ENCYCLOPÆDIA.

VOL. XVII.

PERCEPTION TO POST.

Heldon, Prunier, Casti. Street, London.

THE

LONDON ENCYCLOPÆDIA,

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 convivium conviva civilis.
Coovivator a..nititur omnibus satisfacere; et tamen si quid apponitur, quod hujus aut ilbus palato non respondeat, et hic et ille
arbage 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 banquet. The
master of the least exerts himself to satisfy his guests; but is, 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 may not
distress a kind host

Translation

BY THE ORIGINAL EDITOR OF THE ENCYCLOPÆDIA METROPOLITANA.

ASSISTED BY EMINENT PROFESSIONAL AND CTHER GENTLEMEK.

IN TWENTY-TWO VOLUMES.

VOL. XVII.

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. FLEISCHER, LEIPSIC :
AND WHIPPLE & LAWRENCE, SALEM, NORTH AMERICA.

1829.

AE

5

.685

V. 17