CONTENTS 
OF 
VOLUME EIGHTH. 
(Parr First.) 
On the Action of Transparent Bodies upon the differently 
coloured Rays of Light. By David Brewster, LL.D. 
F. B.S. Lond. & Edin. and F. A. 8. Ed. Page 1 
. Description of a New Darkening Glass for Solar Ob- 
servations, which has also the property of polari- 
sing the whole of the transmitted Light... By- 
David Brewster, LL. D. F. B.S. Lond: & Ed. 
and F. A. S. Ed. - - 25 
. Observations on the Fire-Damp of Coal Mines ; with a 
Plan-for Lighting Mines, so as to guard against 
its Explosion. By John Murray, M. D. F.R.S. 
Edin. Fellow of the Royal College of Physicians 
of Edinburgh, - - 31 
. On the Lines that divide each heinsttnredad Are into Six 
equal- Parts. By W. A. Cadell, ie F. B.S. 
Lond. & Edin. - 61. 
. On the Origin of Cremations or the Riioniites of the: 
Dead. By the Rev. John. Jamieson, D. D. 
F. RB. S. Edin. & F. A. S. E. = 83 
. Additional Communications respecting the Blind and 
Deaf Boy, James Mitchell. By John Gordon, 
M. D. F. B.S. Edin. - - 129 
\VIL. 
