THE 
LONDON ano EDINBURGH 
PHILOSOPHICAL MAGAZINE 
AND 
JOURNAL OF SCIENCE. 
CONDUCTED BY 
SIR DAVID BREWSTER, K.H.LL.D.F.R.S. L. & E. &e. 
RICHARD TAYLOR, F.L.S.G.S. Astr.S. Nat.H. Mose. &c. 
AND 
RICHARD PHILLIPS, F.R.S. L. &E. F.G.S, &c. 
“Nec aranearum sane textus ideo melior quia ex se fila gignunt, nec noster 
vilior quia ex alienis libamus ut apes.” Just. Lies. Monit. Polit. lib. i. cap. 1. 
VOL" Vint, 
NEW AND UNITED SERIES OF THE PHILOSOPHICAL MAGAZINE, 
ANNALS OF PHILOSOPHY, AND JOURNAL OF SCIENCE. 
JANUARY—JUNE, 1836. 
LONDON: 
PRINTED BY RICHARD TAYLOR, RED LION COURT, FLEET STREET, 
Printer to the University of London. 
SOLD BY LONGMAN, REES, ORME, BROWN, GREEN, AND LONGMAN; CADELL} 
BALDWIN AND CRADOCK; SHERWOOD, GILBERT, AND PIPER 5 SIMPKIN 
AND MARSHALL; WHITTAKER AND CO.; AND S, HIGHLEY, 
LONDON: -—— BY THOMAS CLARK, AND ADAM AND 
CHARLES BLACK, EDINBURGH; SMITH AND SON, 
GLASGOW , HODGES AND M’ ARTHUR, DUB- 
LIN; AND G. W.M, REYNOLDS, PARIS. 
