CONTENTS. Ill 



Page 

 2. Algae Britannicae, or Description of the Marine and other Inarti- 

 culated Plants of the British Islands belonging to tlie Order Algae ; 

 with Plates illustrative of the Genera. By Robert Kaye Gre- 

 viLLE, LL. D. &c. &c. 8vo. Edinburgh, 1830, . 360 



^'•.^.:^^ '■ iHoaac? 



XXV. PROCEEDINGS OF SOCIETIES, . . 365 



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



2. Proceedings of the Society for the Encouragement of the Useful 



c iuoAih! Arts in Scotland, . . . 366 



3. Proceedings of the Cambridge Philosophical Society, . 368 



XXVI. SCIENTIFIC INTELLIGENCE, . ib. 



/I JSaO r>qfiq I. NATURAL PHILOSOPHY.* 



Optics— I. On the Manufacture of Glass for optical purposes. 2. Effect of 



Light on liquids. By M. Dutrochet, . . 368 — 370 



Meteorology. — 3. Meteor at Plymouth, i83u;'ii V— . 371 



II. chemistry. 



4. Reduction of Nitrate of Silver. 5. Notice on the Atacama Meteoric Iron. 

 By Dr Turner. 6. Mineral water of Ronnely. 7. Atomic weight of 

 Iodine and Bromine. 8. Analysis of a Meteoric Stone, . 371 — 373 



III. NATURAL HISTORY. 



Mineralogy — 9. Analysis of AUophane from Firmi in the Aveyron. By 

 M. J. GuTLLEMiN. 10. Mineral Pitch near St Agnes, Cornwall, discover- 

 ed by Mr Kenwood. 11. Fresh discovery of the Chromate of Iron in 

 Shetland, .... 373—374 



Zoology — 12. Observations on Serpents. By M. Desvoidy. 13. A». 

 count of another case of United Twins in the East, . • 374 



XXVII. List of Patents granted in Scotland since July 15, 1829, . 375 



XXVIII. Celestial Phenomena, from April 1st, to July 1st, 1830, . 376 



XXIX. Summary of Meteorological Observations made at Kendal in Decem- 

 ber 1829, and January and February 1830. By Mr Samuel Mar- 

 shall. Communicated by the Author, , 378 



XXX. Register of the Barometer, Thermometer, and Rain-Gage, kept at 



Canaan Cottage. By Alex. Adie, Esq. F. R. S. Edinburgh, 380 



