11 
CONTENTS. 
Art. X. Account of a Map by a Slave to the Heir-Apparent ? 
of Ava. By Francis Hamilton, M. D. F. R.S.L. 
&E. & F.A.S.L. & E. - 270 
XI. New Inquiries into the Laws which are observed in 
the Distribution of Vegetable Forms. By Baron 
Alexander Humboldt, - - 273 
XII. History of Mechanical Inventions and Processes in 
the Arts, — - - - 290 
1. Account of Factitious Gilding for Chain-Bridges, and 
other Works in Iron. Communicated by John Ro- 
bison, Esq. F. R. S. E. - - 290 
2. Account of a New Copying-Press, - 291 
3. Description of a New Safety-Lamp for Mines. By John 
Murray, Esq. F, L. S. and Lecturer on Chemistry, 292 
4. Account of a New Patent Pocket Copying-Press, by 
M. J. Brunei,, - - 293 
o. Mr Brookedon’s Improvement on the Method of Draw- 
ing Cylindrical Wire, - . 294 
6. Account of Mr Witty’s Improvement on Pumps, ib. 
7. Account of Mr Gladstone’s New Method of Propelling 
Steam-Boats, - - 295 
8. Account of Mr Hagner’s Improvements in the Art of 
Making White Lead and Verdigris, - - 296 
?), Account of Mr Johnson’s Method of Consuming the 
Smoke of Steam-Engines, - 297 
1 0. Account of Mr Saul’s Fruit-Gatherer, - ib. 
11. Mr Aikin’s Method of Protecting Steel Articles from 
Rust by a Coating of Caoutchouc, - 298 
12. New Method of Illuminating Houses with Gas, 299 
13. Account of a New Process for separating Iron from other 
Metals. By J. F.W. Herschel, Esq. F. R. S. L. & E. 300 
14. Account of Mr Phillip’s Method of Propelling Vessels, 302 
15. Account of Messrs Reedhead and Parry’s Method of 
Propelling Vessels, - - ib. 
16. Account of Mr Hill’s Improvement on the Manufac- 
ture of Starch, - - ' 303 
17. Account of Mr Ward’s Alternating Steam-Engine, ib. 
18. Account of Mr Stein’s Improvements on Steam-Engines, 305 
XIII. Account of the Hot-Springs of F urnas, in the Island of 
St Michael. By J. W. Webster, M. D. Cor. Sec. 
L. S. N, E., M. W. S., &c. - - 306 
XIV. An Account of some Mistakes relating to Dr Brad- 
ley’s Astronomical Observations, and Harriot’s 
MSS. By Dr' Robertson, Savilian Professor of 
Astronomy in the University of Oxford, 313 
XV. Description of some New and Rare Plants discovered 
in Canada in the year 181 9 . By John Goldie, 31 9 
