Meteorological Observations. 79 



As the theoretic results closely approximate, there is a very simple 

 method of arriving at the truth, which is to determine the atomic 

 weight of dulcose ; this M. Laurent states he has done by analj'sing 

 the barytic compound which crystallizes very well and contains 

 C* H'^s'Ba^ 0''-+14 Aq. M.Laurent expresses a hope that M. 

 Jacquelain will repeat this exiieriment, and confirm the results which 

 he has observed. — Ibid. 



METEOKOLOGICAL OBSERVATIONS FOR NOV. 1850. 

 Cliiswick. — November I. Rain : fine. 2, 3. Fine. 4. Boisterous, with rain : 

 fine : clear. 5. Cloudy. 6. Very fine. 7. Hazy : very fine. 8. Rain. 9. Very 

 fine. 10. Fine: cloudy. II. Very fine. 12. Uniformly overcast : very fine: 

 clear. 13. P'oggy : overcast : cloudy. 14. Clear and fine : frosty. 15. Frosty: 

 overcast. IS. Drizzly: hazy : rain. 17. Fine. 18. Rain. 19. Low clouds : 

 very fine : rain. 20. Fine: rain. 21. Cloudy : fine : overcast. 22. Overcast: 

 s'ight rain. 23. Kain : clear at night. 24. Boisterous, with rain. 25. Clear; 

 cloudy: rain. 26. Hazy clouds : overcast: cloudy. 27. Cloudy: rain: clear 

 and frosty. 29. Frosty : fine : slight rain. 30. Frosty : overcast. 



Mean temperature of the month 45 "49 



Mean temperature of Nov. 1849 41 -99 



Mean temperature of Nov. for the last twenty-four years .43-41 



Average amount of rain in Nov 2-38 inches. 



Boston. — Nov. 1. Rain: rainA..'vi. 2. Cloudy. 3. Fine. 4. Cloudy: stormy: 

 rain a.m. 5, 6. Fine. 7. Cloudy. 8. Fine. 9. Cloudy : rain p.m. 10. Fine. 

 11. Cloudy: rain early a.m. 12 — 14. Fine. 15. Cloudy: rain p.m. 16. Cloudy : 

 rain A.M. and P.M. 17. Fine. 18. Cloudy : rain p.m. 19. Fine : rain a.m. 20. 

 Rain: rain a.m. and p.m. 21. Cloudy. 22. Cloudy: rain a.m. and p.m. 23, 24. 

 Rain: rain a.m. and p.m. 25. Cloudy. 26. Fine. 27. Rain: rain a.m. 28. 

 Fine. 29, 30. Cloudy. 



Sandwick Mnnse, Orkney. — Nov. 1. Rain. 2. Bright : showers. 3. Showers: 

 thunder. 4. Sleet-showers: showers: sleet: thunder. 5. Cloudy: showers: sleet. 

 6. Bright: clear: aurora. 7. Rain: showers: thunder and lightning. 8. Showers. 

 9. Cloudy: rain. 10. Bright: cloudy: aurora. 11. Showers: aurora. 12. 

 Drizzle : showers. 13. Hail-showers : clear : frost. 14. Clear : frost. 15. Clear: 

 frost. 16. Sleet showers. 17. Showers. 18. Showers: clear: lunar halo. 

 19. Rain. 20. Showers: clear. 21. Bright: clear: frost. 22. Cloudy : rain. 

 23, Cloudy. 24. Cloudy : clear *. 25. Showers. 26. Bright : sleet-showers. 

 27. Snow : clear : frost. 28. Bright : cloudy. 29. Showers : bright : cloudy. 

 30. Bright : clear. 



Apiilegarlh Mnnse, Dumfries-shire. — Nov. 1. Soft rain and brisk wind all day. 

 2. Wet A.M. : cleared and was fine. 3. Frequent showers. 4. Heavy rain : 

 hail : stormy blasts. 5. Heavy showers : hail : hurricane. 6. Moist, but rain 

 iiotheavy. 7. Rain very heavy, especially p.m. 8. Slight showers. 9. Gloomy 

 November day ; wet p.m. 10. Fair, but dull. II. Rain early a.m.: damp 

 evening. 12. Fair and fine. 13. Raw: frost: cloudy p.m. 14. Frost hard. 

 15. Thick fog; raw and chilly. 16. Thick fog: cleared p.m. 17. Showery: 

 cleared P.M. 18. Rain during night: showers: high wind. 19. Rain very 

 heavy : flood : mercury very low. 20. Rain, not so heavy : mercury rose quickly. 

 21. S'ight frost, rime: clear and fine P.M. 22. Raw and damp : showers p.m. 

 23. Rain during night ; flood. 24. Rain heavy and very high wind. 25. Rain 

 during night : showers all day. 26. Slight frost a.m. : raw : showers. 27. Frost 

 very keen all day. 28. Frost still keen: clear and sunny. 29. Frost milder. 

 30. Frost keen again. 



Mean temperature of the month 43°'l 



Mean temperature of Nov. 1849 42 



Mean temperature of Nov. for the last twenty-eight years... 40 '6 

 Average rain in Nov. for twenty-three years 3'60 inches. 



• Great fall of barometer, but no stormy weatlier in Orkney. I have subse- 

 quently hoard of the storm which caused such dreadful wrecks on the west coast 

 of Ireland a few days earlier, and the fall of the barometer here is probably the 

 efl'ect of the same atiiiO-iphcric wave. 



