CONTENTS. 

 VOL. n. 



1815. 



ADDITIONAL Observations on the Optical Properties and Structure of 

 heated Glass and unannealed glass Drops. By David Brewster, LL.D. 

 F.R.S. Ediu. and F.S.A. Edin page 1 



Description of a new Instrument for performing mechanically the In- 

 volution and Evolution of Numbers. By Peter M. Roget, M.D. ... 2 



Experiments on the Depolarization of Light as exhibited by various 

 mineral, animal, and vegetable Bodies, with a Reference of the Phe- 

 nomena to the general Principles of Polarization. By David Brewster, 

 LL.D. F.R.S. Edin. and F.S.A. Edin 4 



On an ebbing and flowing Stream discovered by boring in the Harbour 

 of Bridlington. By John Storer, M.D 6 



On the Effects of simple Pressure in producing that Species of Cry- 

 stallization which forms two oppositely polarized Images, and ex- 

 hibits the complementary Colours by polarized Light. By David 

 Brewster, LL.D. F.R.S. Edin. and F.S.A. Edin 7 



Experiments made with a View to ascertain the Principle on which the 

 Action of the Heart depends, and the Relation which subsists be- 

 tween that Organ and the nervous System. By A. P. Wilson Philip 8 



Experiments to ascertain the Influence of the Spinal Marrow on the 

 Action of the Heart in Fishes. By Mr. William Clift 10 



Some Experiments and Observations on the Colours used in Painting 

 by the Ancients. By Sir Humphry Davy, LL.D. F.R.S 11 



On the Laws which regulate the Polarization of Light by Reflection 



from transparent Bodies. By David Brewster, LL.D. F.R.S. Edin. 



and F.S.A. Edin 14 



On some Phenomena of Colours, exhibited by thin Plates. By John 



Knox, Esq 15 



Some farther Observations on the Current that often prevails to the 



Westward of the Scilly Islands. By James Rennell, Esq. F.R.S. ... 17 

 Some Experiments on a Solid Compound of Iodine and Oxygen, and on 



its Chemical Agencies. By Sir Humphry Davy, LL.D. F.R.S. ... 19 

 On the Action of Acids on the Salts usually called Hyperoxymuriates, 



and on the Gases produced from them. By Sir Humphry Davy, 



LL.D. F.R.S 20 



a2 



