CONTENTS. in 



Page 

 M. G. S. Secretary to the Society of Scottish Antiquaries. Communicat- 

 ed by the Author, - - - - - -138 



XXVII. Notice regarding the Discovery of Live Cockles in a Peat Moss at a 

 great distance from the Sea. By John Stark, Esq. M. W S. Com- 

 municated by the A uthor, - - - - 142 



XXVIII. Notice of Captain Parry's Last Expedition to the Arctic Regions in 

 1824 and 1825, - - - - - 147 



XXIX. HISTORY OF MECHANICAL INVENTIONS AND PRO- 



CESSES IN THE USEFUL ARTS, - - 150 



1. Description of the Double Weather Sluices invented by Robert 

 Thom, Esq. Rothesay. Communicated by the Author, - ib. 



2. Description of a Rotatory Gas-Burner, ... 153 



3. Curious Law respecting the Vibration of Pendulums, - 154 



4. Reverend Mr Lardner's Method of Securing Carriage Wheels on 

 their Axles, ..... 155 



XXX. ANALYSIS OF SCIENTIFIC BOOKS AND MEMOIRS, ib. 



I. Account of the Earthquakes which occurred in Sicily, in March 1823. 

 By Sig. Abate Ferrara, Professor of Natural Philosophy in the 

 University of Catania, .... - ib. 



II. Schow's Essay on Botanical Geography. Copenhagen. 1823, 161 



III. Memoir on the Red Snow of the Arctic Regions. By Professor 

 Agardh of Lund, .... 167 



XXXI. PROCEEDINGS OF SOCIETIES, - - 173 



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



2. Proceedings of the Society for Promoting the Useful Arts in Scotland, 174 



XXXII. SCIENTIFIC INTELLIGENCE, - - 175 



I. NATURAL philosophy. 



Astronomy 1. First Comet of 1825. 2. Second Comet of 1825. 3. Third 



Comet of 1825. 4. Fourth Comet of 1825, the periodical Comet of Encke. 

 5. Fifth Comet of 1825. 6. Stars without any proper Motion. 7. Miss 

 Herschel's Catalogue of Nebulae. 8. Mr Pond's Method of Determining 

 the Direction of the Meridian. 0. Remarkable Effect on the Cambridge 

 Transit Instrument, .... - 175'— 177 



Optics. — 10. Committee for the improvement of Glass for Optical purposes. 

 11. Traces of Polarized Light in Halos. 12. Telescopes without Irradiation. 

 13. Optical structure of Edingtonite. 14. Phosphorescence of certain 

 Fluids, ..... 177, 178 



Electricity. — 15. Electricity produced by Evaporation. 16. Electricity of 

 the Atmosphere. 17. Electricity of Flame. 18. Subterraneous passage of 

 Lightning, - 17«, 179 



Galvanism 19. Analogy between the Phenomena of Galvanism and those 



of Fermentation. 20. Avogadro's Multiplying Voltimeter, - 179,180 



KXTEOBOLOOY 21. Mean Temperature of the Equator. 22. Diminution 



of the Temperature with the Altitude. 2."J. Fall of a Meteoric Stone, at 

 Nanlgcmory, Maryland. 21. Hoar Frost on Iron Rails. 25. Mean Height 



