VI CONTENTS. 



INTELLIGENCE AND MISCELLANIES. 



I. Foreign. 



Page. 



I, 2. Oil of the seed Croton Tiglium — Strength of Leaden 



Pipes, - - - 369 



3. Inspiration of Inflammable Gas, - - 370 



4, 5. Artificial Gold a new alloy — Comparative analysis of 



the elastic Bitumen of England and France, 371 



6,7. Proportion of Male and Female Children — On the spe- 

 cies or varieties in the Human Race, - 372 

 8, 9, 10. A new mode of preparing paper for draughtsmen, 

 &c. — Formation of metallic copper by water and 

 fi re — On the poison of the common Toad, 373 



II, 12. Opposite effects of a change of density of the air, 



as affecting the going of a clock — Distribution of 

 land and water, - 375 



13. Notice of steatite or soapstone, - - 376 



14. Botany. — M. Ramond on the Vegetation of the summit 



of the Pyrenees, - 377 



15. Polar Fogs, ----- 378 



16. Mode of preserving wooden buildings from the effects 



of fire, - - - - - 379 



17. Premiums awarded by the French Academy, - 380 



18. University of Halle — Jubilee Fete of Chancellor Nie- 



meyer, - 381 



19. Chlorine and Chlorides, - - - 382 



20. 21. Analysis of Tourmaline — Capillary Action, 384 

 22, 23, 24. Intense Light — Solubility of Silex — Theory of 



Nitrification, - 385 



25. New Compounds of Bromine, ... 386 



26, 27, 28. Formation of Ammonia — Fluoric Acid and Flu- 



ates — Emigration of Butterflies, - - 387 



29. Rewards of Science, - 389 



30. Sulphate of Quinine, - - - - 390 



31. 32. Rural Economy — On a Gelatinous Quartz; by M. 



Guillemin, - - - 391 



33, 34. Extract of a letter addressed to M. de Ferussac, 

 Berlin, Feb. 27, 1827— The Duke de la Rochefou- 

 cauld, - - - - - 392 



II. Domestic. 



1. Singular organic relic, . - - - 393 



2. Plane surfaces not separated by a blast in certain cases, 395 



3. Singular appearance of circles around the moon, 397 



