Meteorological Observations. 391 



ON THE ACETATES OF MANGANESE, CADMIUM, AND NICKEL. 

 BY M. C. VON HAUER. 



The acetate of manganese assumes the form of rose-coloured 

 rhomboidal lamellae, generally with truncated edges ; it contains four 

 atoms of water, and is probably isomorphous with the acetate of 

 magnesia. The acetate of cadmium is so difficult to obtain, that 

 several chemists have denied its existence. It crystallizes in rather 

 large prisms, with strongly brilliant planes, which M. Zepharovich 

 has determined to belong to the augitic (hemiprismatic) system. 

 The acetate of cadmium contains three atoms of water, and is iden- 

 tical in chemical character with the acetate of zinc. It is only 

 obtained by leaving the acid solution to evaporate in absolute repose. 



Acetate of nickel contains four atoms of water. Its crystallo- 

 graphic description has been recently given in M. Schabus's memoir, 

 which obtained the prize offered by the Imperial Academy of Vienna. 

 — Proceedings of the Imperial Geological Institute of Vienna, March 6, 

 1855. 



METEOROLOGICAL OBSERVATIONS FOR SEPT. 1855. 



Chisivici. — September 1. Clear and fine : cloudy. 2. Cloudy. 3. Clear: slight 

 shower : fine. 4. Cloudy. 5. Fine : cloudy : clear and cold at night. 6. Clear : 

 cloudy. 7. Very clear : cloudy : fine. 8. Dense fog : clear and very fine. 9. Very 

 fine. 10. Foggy: fine: very clear. 11. Very fine. 12. Slight fog : very fine: 

 clear: rain at night. 13. Kain. 14. Constant rain. 15. Uniformly overcast : 

 fine. 16. Overcast: clear and fine. 17. Rain : hazy : overcast. 18. Hazy : over- 

 cast. 19. Slight haze : fine. 20 — 22. Foggy in the mornings: very fine. 23. 

 Fine : cloudy : very clear. 24. Overcast. 25. Fine : cloudy : clear : frosty at 

 night. 26. Slight haze : very dry air : frosty at night. 27. Foggy : very fine : 

 cloudy. 28, 29. Cloudy : rain. 30. Hazy : cloudy : rain at night. 



Mean temperature of the month 56°-ll 



Mean temperature of Sept. 1854 56-93 



Mean temperature of Sept. for the last twenty-nine years ... 56 '98 



Average amount of rain in Sept 2-503inches. 



Boston.— Seft. 1. Cloudy : rain p.m. 2—6. Cloudy. 7,8. Fine. 9, 10. Cloudy. 

 11,12. Fine. 13. Fine: rain a.m. 14—18. Cloudy. 19,20. Fine. 21,22. 

 Cloudy. 23. Fine. 24. Fine : rain a.m. 25. Cloudy. 26, 27. Fine. 28. Fine : 

 rain p.m. 29. Cloudy : rain a.m. 30. Cloudy. 



Sandwich Manse, Orkney. — Sept. 1,2. Bright a.m.: cloudy p.m. 3. Cloudy 

 A.M. and p.m. 4. Bright a.m. : clear p.m. 5. Showers a.m. : clear p.m. 

 6. Drizzle A.M. and p.m. 7. Cloudy a.m. : showers p.m. 8. Clear a.m. : showers 

 P.M. 9. Bright A.M. : showers P.M. 10. Cloudy a.m. : showers, aurora p.m. 11. 

 Showers a.m. : cloudy, aurora p.m. 12. Rain a.m. : clear, aurora p.m. 13. Cloudy 

 A.M. : clear P.M. 14. Cloudy, hoar-frost a.m. : clear, aiu'ora p.m. 15. Bright, 

 hoar-frost a.m. : cloudy p.m. 10. Showers a.m.: clear p.m. 17,18. Showers 

 A.M. and P.M. 19. Cloudy a.m. : drops p.m. 20. Cloudy a.m. and p.m. 21. 

 Showers a.m. : drizzle p.m. 22. Damp a.m. : drizzle p.m. 23. Cloudy a.m. : 

 clear, fine p.m. 24. Clear a.m. : fine, cloudy p.m. 25. Cloudy a.m. : fine, drops 

 P.M. 26. Drops A.M. : fine, clear p.m. 27. Drops a.m. : cloudy p.m. 28. Drops 

 a.m. and p.m. 29. Rain a.m. : fog p.m. 30. Fog a.m. and p.m. 



Mean temperature of Sept. for twenty-eight previous years ... 52'*42 



Mean temperature of this month 52 '74 



Mean temperature of Sept. 1854 55 -07 



Average quantity of rain in Sept. for fifteen previous years ... 2-81 inches. 



