Meteorological Observations. 71 



calcium, hydrochlorate of ammonia, nitrate of potash, &c. is added 

 to mercury in a bottle, the mercury is always divided into rounded 

 globules, which remain separated from each other for a long time ; 

 but what is very striking is, that the size of the globules, which 

 varies enormously, is always connected with the nature of the aqueous 

 solution. Some solutions immediately cause extreme division in the 

 mercury ; others, on the contrary, produce only very large globules, 

 to whatever extent the agitation may have been carried ; and the 

 same effect is always produced with the same solution. It is to this 

 influence of saline solutions that is due the difficulty often witnessed 

 in collecting mercury when it has been reduced in the moist way. 

 — Ann. de Ch. et de Phys., Novembre 1846. 



METEOROLOGICAL OBSERVATIONS FOR NOV. 1846. 



Chisivick. — November 1. Foggy. 2, 3. Very fine. 4. Overcast. 5. Foggy 

 and drizzly. 6,7. Foggy: hazy, 8. Foggy. 9. Hazy and cold. 10. Dusky 

 clouds: fine. 11. Cold and dry. 12. Overcast. 13. Hazy. 14. Foggy. 

 15. Cloudy. 16. Overcast : cloudy and fine. 17. Densely overcast : slight rain 

 at night. 18. Cloudy : very fine. 19. Cloudy and damp : very fine. 20. Cloudy: 

 boisterous. 21. Very fine : rain. 22. Fine : clear. 23. Slight rain : overcast. 

 24. Hazy and damp : rain : overcast. 25. llain. 26. Clear and fine : foggy. 

 27. Dense fog. 28. Clear and fine. 29. Frosty : clear and fine. 30. Sharp 

 frost : overcast. 



JVIean temperature of the month 44°'53 



Mean temperature of Nov. 1845 , 44 '26 



Mean temperature of Nov. for the last twenty years ... 42 "91 



Average amount of rain in Nov 2*56 inches. 



Boston. — Nov. 1. Foggy. 2. Fine. 3, 4. Cloudy. 5. Fine. 6 — 9. Cloudy. 

 10,11. Fine. 12— 14." Cloudy. 15. Cloudy : rain i-.ji. 16. Cloudy. 17. 

 Cloudy: rain P.M. 18. Cloudy. 19. Fine. 20. Stormy. 21. Cloudy : rain p.m. 



22. Fine : rain p.m. 23. Cloudy : rain p.m. 24. Fine. 25. Cloudy. 26. Fine. 

 27. Cloudy: rain a.m. and p.m. 28. Cloudy : snow p.i.i. 29. Fine: snow on 

 the ground. 30. Fine : melted snow in the gauge. 



Sandwick Manse, Orkney. — Nov. 1. Showers: cloudy. 2,3. Cloudy. 4. Bright: 

 rain. 5. Bright : cloudy. 6. Hazy : rain. 7. Bright : showers. 8. Bright : 

 clear: fine. 9. Clear: very clear and fine. 10. Hoar-frost: cloudy: fine. 

 11 — 15. Cloudy: fine. 16. Bright : clear : aurora. 17. Rain : clear : aurora, 

 south. 18. Clear : showers. 19. Clear: aurora. 20. Rain : showers. 21. 

 Sbo»ers. 22. Rain : clear. 23. Damp : cloudy. 24. Showers. 25. Showers: 

 cloudy. 26. Showers. 27. Ilail-showers. 28. Snow : hail-showers. 29. Snow- 

 drift : clear. 30. Cloudy : shower : thaw. 



Applegarlh Manse, Dumfiics-sldre. — Nov. 1. Slight showers p.m. 2. Showers 

 morning and evening. 3. Rain p.m. 4. Moist a.m. : rain p.m. 5. Showers. 6. Fair, 

 but moist. 7. Fair, but dull and cloudy. 8. Fair and fine. 9. Fair, but cloudy. 

 10. Hoarfrost; clear and fine. U. Fair and fine : hoar-frost a.m. 12 — 15. 

 Fair, but dull. 16. Clear : piercingly cold. 17. Wet. 18. Showers. 19. Heavy 

 rain. 20. Heavy rain; river in flood. 21. Heavy rain: thunder p.m. 22. Rain. 



23. Heavy rain. 24. Rain a.m. 25. Rain and fog. 26. Dull and drizzly. 

 27. Fair. 28. Frost; shower of snow. 29. Hard frost: clear. 30. Frost: 

 thick and foggy. 



Mean temperature of the month 44°'4 



Mean temperature of Nov. 1845 42 '7 



Mean temperature of Nov. for 23 years 40 '2 



Mean rain in Nov. for 18 years 3"63 inches. 



