CONTENTS. Ill 



\ 



Page 

 7. Account of new Bricks for building both cylindrical and curred 



Chimneys. By Mr J. W. HioiiT, Atchitect, - - 158 



8- Method of Mooring Ships in Roadsteads. By Lieut-Col. Milleh, 



F. R. S., . - - - - . 15i> 



9. On the adhesion of Screw Nails. By B. Bevan, Esq. Civil Engineer, ib. 



10. On the great Power and Duty of some new Steam Engines, 166 



11. Process for preparing Indelible Writing-ink, - - ib. 



12. Observations on the Explosion of Steam Boilers. By Mr W. J. 

 Henwood, - - - - - ib. 



13. Account of the Collection and Preparation of the Fucus saccharinus, 



a sea-weed, for the Chinese market, and its uses, - 162 



XXVII. PROCEEDINGS OF SOCIETIES, - - - 164 

 Proceedings of the Royal Society of Edinburgh, - - ib. 



XXVIII. SCIENTIFIC INTELLIGENCE, - - - 166 



I. NATURAL PHILOSOPHY. 



Astronomy. — 1. Solar Eclipse of November 1826 observed at Naples. 2. 

 Opposition of Vesta to the Sun. 3. Opposition of Juno to the Sun in March 

 1828. 4. New Variable Star in the Serpent, - - 166— 1G7 



Optics — 5. On the Luminous Appearance of the Ocean. By J, Henderson, 

 Esq. - - _ . - - 167 



Magnetism. — G. Eaton's proposed Improvement on Magnetic Needles. 7« 

 Professor Hansteen's Magnetic Tour to Siberia. 8. On the Magnetic Actions 

 excited in all Bodies by powerful Magnets, - » - 169 



Electro-magnetioM.— 9. On the Rotation of a Magnet about its Axis, I70 



Meteorology. — 10. Sound of the Aurora Borealis in Iceland, observed by 

 Mr Henderson. 11. Auroras Boreales observed in Roxburghshire in 1827. 

 12. Great Dryness in the Antilles in 1827. 13. Meteoric Stone at Futteh- 

 pore, - - - - - I76--I73 



II. chemistry. 



14. M. Despretz on the Heat Developed in Combustion. 15. Karsten's Me- 

 tallurgy of Iron. 16. Iodine in Cadmium. I7. Analysis of the Green 

 Iron-ore. 18. Analysis of the Arseniate of Lead. 19. On the Detection of 

 Antimony in Mixed Fluids. By Edward Turner, M. D. 20. Ulti- 

 mate Analysis of several Vegetable Substances. By M. F. Marcet. 

 21. On a Chloride of Manganese, remarkable for its Volatility. By M. 

 J. Dumas. 22. On the properties of Sulphur. By M. J. Dumas. 23. 

 On a New Method of Preparing the Deutoxide of Barium. By M. Quesne- 

 ville, Fils, - - - - 173—180 



III. natural history. 



Mineralogy — 24. Brachytypous Lime-Haloide of Mohs. 25. Chrysolite 

 in the Cavities of Obsidian. 26. New Minerals. 27. Mica from New Jer- 

 sey. 28. Dr Thomson's Analysis of Pure Chromate of Iron, - 180 182 



Geology. — 29. On the Boulder-stones in the North of Germany. 30. Baron 

 Von'Buch on Volcanoes. 31. Greenstone and Porphyry of the Hartz. 32. 

 Geo%ical Map of Germany in 42 sections, - - 180—183 



