!▼ CONTENTS. 



XVII. Scientific Intelligence : — 



METEOROLOGY. 



1. Use of Coloured Glasses to assist the View in Fogs. 



2. Ozone, 170-171 



HYDROGRAPHY. 



3. On the Phenomena of the Rise and Fall of the 

 Waters of the Northern Lakes of America. 4. 

 Water Thermometer. 5. On the Falls of Niagara. 

 6. On the Existence of Manganese in Water. 7. 

 Arsenic in Chalybeate Springs, . 172—175 



GEOLOGY. 



8. The Coal Formation of America. 9. River Ter- 

 races of the Connecticut Valley, . 175—177 



10. Fossil Crinoids of the United States. 11. Discovery 

 of Coral Animals on the Coast of Massachusetts. 

 12. On the Circulation and Digestion of the Lower 

 Animals. 13. Distribution of the Testaceous Mol- 

 lusca of Jamaica. 14. Metamorphoses of the Le- 

 pidoptera. 15. On the Zoological Character of 

 Young Mammalia. 16. The Manatus or Sea Cow, 

 the Embryonic Type of the Pachydermata. 17. 

 Fossil Elephant and Mastodon from Africa. 18. 

 Cauterization in the case of Poisonous Bites. 19. 

 Dental Parasites, .... 177-184 



20. The Steamboat New World. 21. Use of Parachutes 

 in Mines. 22. Adulterations of Drugs. 23. To 

 restore Decayed Ivory. 24. Ivory as an Article 

 of Manufacture. 25. Flexible Ivory. 20. Air- 

 Whistle. 27. Curious Electrical Phenomenon, 



184-188 



XVIII. List of Patents granted for Scotland from 22d March 



to 22d June 1850, 189 



Memorandum. — New Publications will be noticed in our next 

 Number. 



