Meteorological Observations. 79 



mixture is heated to ebullition : in the first case it is bichloride plus 

 binoxide of mercury, or an alkaline oxide which is formed without any 

 precipitation of metallic mercury ; whereas when heated, bichloride 

 of mercury only is produced, by the mere affinity of the alkaline chlo- 

 rides for bichloride of mercury, and in this latter case precipitation of 

 metallic mercury always occurs. 3rd. That it is not correct to say, 

 that when bichloride of mercury is formed in these various mixtures, 

 it is always easy to remove a portion of the bichloride by means of 

 aether ; this solvent being incapable of removing it when accompanied 

 with binoxide of mercury, as that is which the protochloride produces 

 by contact with cold solutions of the aerated alkaline chlorides. 4th. 

 That although the proportion of mercury dissolved is greater when 

 operating at common temperatures with hydrochlorate of ammonia 

 than with alkaline chlorides, it is nevertheless impossible to remove, 

 by means of aether, the mercurial compound dissolved in this case. 

 5th. That the alkaline chlorides do not dissolve calomel in the state 

 of protochloride, the compound dissolved having all the characters 

 of the bisalts of mercury, as incontestably shown by the action of 

 the alkaline cyanide, sulphuret and iodide employed in excess. — 

 Journ. de Ph. et de Ch., Octobre 1843. 



METEOROLOGICAL OBSERVATIONS FOR NOVEMBER 1843. 

 Chiswick. — November 1. Hazy : foggy at night. 2. Hazy : rain. 3. Foggy: 

 very fine. 4, 5. Fine. 6. Overcast : rain. 7. Heavy rain : cloudy : clear. 



8. Cloudy and fine : heavy rain : clear and frosty at night. 9. Frosty : clear. 



10. Rain. 11, Fine: easterly haze : clear and frosty. 12. Cloudy and fine : 

 clear and frosty. 13. Sharp frost: fine: cloudy. 14. Hazy : rain. 15. Frosty : 

 very fine. 16. Clear and very fine. 17. Frosty: haze: heavy rain. 18. Fine. 

 19. Clear: boisterous at night, 20. Clear and windy. 21, Overcast: boisterous. 



22. Hazy clouds : overcast : heavy rain. 23. Rain : clear and frosty at night. 

 24. Foggy : densely overcast: rain. 25. Hazy and drizzly. 26. Cloudy : boisterous 

 at night. 27. Squally : clear and fine. 28. Very fine. 29. Clear and very fine 

 throughout. 30. Sharp frost : hazy : drizzly. — Mean temperature of the month 

 09° above the average. 



Boston. — Nov. 1. Cloudy, with rain. 2. Foggy: rain early a.m. 3. 

 Foggy. 4. Fine. 5. Cloudy. 6, 7. Rain : rain early a.m. 8, 9. Fine. 10. 

 Cloudy: rain early a.m. 11. Cloudy. 12, 13. Fine. 14. Cloudy : rain p.m. 

 15. Foggy: rain p.m. 16 — 18. Cloudy. 19. Fine: stormy night. 20. Stormy: 

 rain early a.m. 21. Cloudy : rain early a.m. 22. Stormy : rain a.m. and p.m. 



23. Rain. 24. Fine. 25. Cloudy : rain p.m. 26. Cloudy. 27. Fine. 28. 

 Cloudy : rain p.m. 29,30. Fine. 



Sandwick Manse, Orkney . — Nov. 1. Showers : clear : fine. 2. Clear : fine. 

 3. Cloudy. 4. Rain : cloudy. 5. Clear : clear and rain. 6. Showers : clear. 

 7. Showers. 8. Showers and hail. 9. Cloudy : cloudy and snow. 10. Damp. 



11. Cloudy. 12. Rain. 13. Cloudy: showers and clear. 14. Bright: fine 

 and cloudy. 15. Rain: showers. 16. Cloudy. 17. Showers. 18. Cloudy: 

 clear. 19. Clear: showers: clear. 20. Rain. 21. Showers : cloudy. 22,23. 

 Cloudy : showers. 24. Showers : clear frost. 25. Fine : clear frost. 26. Damp : 

 fine : rain. 27. Rain : damp. 28. Damp : rain. 29. Showers : cloudy. 30, 

 Rain. 



Applegarth Manse, Dumfries-shire. — Nov. 1. Frost : fine. 2. Fine. 3. Cloudy: 

 rain p.m. 4. Showers. 5. Fair. 6. Showers. 7. Rain early a.m. 8. Fair. 



9. Fair till p.m. : wet. 10. Showers. 11. Fair and fine. 12. Dull and cloudy : 

 showers. 13. Dull and cloudy. 14. Fair. 15. Rain: frost a.m. 16. Fair: 

 frost a.m. 17,18. Hain. 19. Slight showers. 20. Showers. 21. Rain. 22. 

 Slight showers. 23. Frost. 24. Frost : thaw p.m. 25—28. Rain. 29. Fair, 

 30. Fog and rain p.m. 



