394 Scientific NotieeS'-^Chemistri/. C^ay, 



the diluvium of the Wealds of Kent and Sussex, and that of 

 Hanxpshire and the neighbourhood of London, may thus be 

 accounted for. As the freshwater formations in Hampshire and 

 the Isle of Wight, as well as the Plastic and London clays, are 

 covered by deep beds of a similar gravel, consisting of cbalk- 

 flints, the author states several geological facts to prove, that 

 these more recent formations existed when the chalk and tertiary 

 strata were elevated, and, notwithstanding their difference of 

 inclination, even when the strata of Alum Bay assumed their 

 vertical position, and consequently they were all covered indis- 

 criminately by a similar stratum of diluvium. 



April 7.— A translation was read of a letter from M. de Gim- 

 bernat, of Geneva, principally upon Sulphate of Soda, to G. B. 

 Greenough, Esq. FGS. 8ic. 



A paper, entitled, "On the Geology of the Valley of the St. 

 Laurence ; " by John J. Bigsby, MD. FGS. was read in part. 



April 21. — The reading of Dr. Bigsby 's paper was continued. 

 E. W. B. 



Article XIV. 



SCIENTIFIC NOTICES. 



Chemistry. 



1 . Analysis of the Soot from a Wood Fire. 



The following results were obtained by M. Henri Braconnot, 

 from an examination of the soot from wood : 



1. Ulmin, precisely similar to that produced artificially 



by saw-dust and potash, estimated at 30*20 



2. Animalised matter, very soluble in water, and insolu- 

 ble in alcohol 20-00 



3. Carbonate of lime, mixed with some traces of mag- 



nesia 14*66 



4. Water 12-50 



5. Acetate of lime 6-65 



6. Sulphate of lime 5-00 



7. Acetate of potash 4-10 



- 8. Carbonaceous matter insoluble in alkalies 3-85 



9. Ferruginous phosphate of lime 1*50 



10. Silica 0-95 



1 1. Acetate of magnesia 0-53 



12. Peculiar acrid and bitter principle (asbohne) about. . 0*50 



13. Chloride of potassium 0-36 



14. Acetate of ammonia, estimated at 0'20 



16. Acetate of iron Trace 



100-00 

 (Anuales de Chimie.) 



