XVi SEVENTH REPORT—1837. 
son, K.H., Secretary of the Royal Society of Edinburgh, and 
John Scott Russell, Esq., M.A., F.R.S., Edin. (Reporter). 
On the relative strength and other Mechanical Properties of 
Cast Iron obtained by Hot and Cold Blast, by Eaton Hodgkinson. 
On the Strength and other Properties of Iron obtained from 
the Hot and Cold Blast, by W. Fairbairn. 
The following Reports and Continuations of Reports have been 
undertaken to be drawn up at the request of the Association. 
On the progress of Electro-chemistry and Electro-magnet- 
ism, so far as regards the experimental part of the subject, by 
P. M. Roget, M.D., Sec. R.S. 
On the Connexion of Electricity and Magnetism, by S. H. 
Christie, Sec. R.S. 
On the state of knowledge of the Phenomena of Sound, by 
Rev. Robert Willis, M.A., F.R.S., &c. 
On the state of our knowledge respecting the relative level 
of Land and Sea, and the waste and extension of the land on 
the east coast of England, by R. Stevenson, Engineer to the 
Northern Lighthouses, Edinburgh. 
On the Botany of North America, by Jacob Greene, M.D., 
and Professor Sir W. J. Hooker, M.D. 
On the Geographical Distribution of Insects, and particu- 
larly of the order Coleoptera, by J. Wilson, F.R.S.E. 
On circumstances in Vegetation influencing the Medicinal 
Virtues of Plants, by R. Christison, M.D. 
On Salts, by Professor Graham, F.R.S. 
On the progress of Medical Science in Germany, by Dr. 
Graves. 
On the Differential and Integral Calculus, by Rev. Professor 
Peacock, M.A., F.R.S., &c. 
On the Geology of North America, by H. D. Rogers, F.G.S., 
Professor of Geology, Philadelphia. 
On the Mineral Riches of Great Britain, by John Taylor, 
F.R.S., G.S. 
On Vision, by Professor C. Wheatstone, F.R.S. 
On the application of a General Principle in Dynamics to 
the Theory of the Moon, by Professor Sir W. Hamilton. 
On Isomeric Bodies, by Professor Liebig. 
On Organic Chemistry, by Professor Liebig. 
On Inorganic Chemistry, by Professor Johnston, F.R.S. 
On Fossil Reptiles, by Professor Owen, F.R.S. 
On the Salmonidz of Scotland, by Sir J. W. Jardine. 
On the Caprimulgide, by N. Gould, F.L.S. 
On theGenera of Fossil Insects, byRev.F.W.Hope,F.L.S.,&c. 
