Meteorological Observations. 399 



the aconitic and equisetic acids, and of the non-identity of the latter 

 with maleic acid ; but M. Dessaignes states, that the details which 

 he could give on this subject are rendered useless by the recent pub- 

 lication of M. Baup thereon. The author concludes this notice by 

 stating a method of obtaining, w T ith asparagin, an aspartic acid 

 which crystallizes in the same form as aspartic acid procured from 

 the bimalate of ammonia. Heat to 392° F. aspartate of ammonia 

 obtained from asparagin, till no more ammoniacal odour is percep- 

 tible, there remains a brown substance that is very slightly soluble, 

 which, treated with hydrochloric acid, reproduces aspartic acid, 

 crystallizing in short hard prisms, like those of the acid derived from 

 the malic, maleic and fumaric acids. — Comptes Rendus, Septembre 16, 

 1850. 



METEOROLOGICAL OBSERVATIONS FOR SEPT. 1850. 



Ckiswick. — September 1. Drizzly. 2 — 5. Very fine. 6. Clear and fine. 7. 

 Frosty : very fine. 8. Cloudy. 9. Overcast. 10. Overcast : clear. 11. Foggy: 

 very fine. 12. Foggy : fine : clear. 13. Slight fog : fine : clear. 14. Foggy: 

 fine : clear. 15. Slight fog : cloudy. 16. Overcast: cloudy. 17. Clear and 

 fine. 18. Fine : overcast. 19. Foggy: overcast : rain. 20. Cloudy: rain. 

 21. Boisterous : heavy rain at night. 22. Heavy rain. 23. Rain : lightning in 

 the evening. 24. Cloudy : very fine. 25. Dense fog: very fine. 26. Overcast: 

 constant heavy rain. 27. Fine : thunder and heavy rain in afternoon. 28. Clear: 

 fine : clear. 29. Fine : rain. 30. R*in : rather boisterous : overcast. 



Mean temperature of the month 54°'23 



Mean temperature of Sept. 1849 57 '16 



Mean temperature of Sept. for the last twenty-four years . 57 *23 



Average amount of rain in Sept 261 inches. 



Boston. — Sept. 1. Cloudy. 2. Fine. 3. Cloudy: rain p.m. 4 — 6. Fine. 

 7. Cloudy : rain p.m. 8—12. Cloudy. 13—15. Fine. 16,17. Cloudy. 18. 

 Fine. 19. Cloudy. 20. Fine : rain p.m. 21. Cloudy : rain early a.m. 22. Fine. 



23. Cloudy : rain p.m. 24. Cloudy. 25. Foggy. 26. Rain : rain early a.m. 



27. Fine : rain early a.m. 28, 29. Fine : rain p.m. 30. Cloudy : rain a.m. 

 Applegarth Manse, Dumfries-shire. — Sept. 1. Fine harvest day. 2. Fair, but 



cloudy : threatening p.m. 3. Very fine: frost rime in the morning. 4. Frost 

 rime a.m. : one slight shower. 5, 6. Fair and fine. 7 Fair and fine, though 

 chill. 8. Fair and fine : milder. 9 Fair and fine : smelling of frost. 10. Fair 

 and fine : cloudy. 11. Fair and fine: cloudy: very warm a.m. 12. Fair and 

 fine : heavy dew : white rime. 13. Fair and fine : fine harvest weather. 14. Still 

 fair and fine. 15. Dull a.m., but cleared, and was fine. 16. Fine, but colder. 

 17. Fine, but colder : mercury falling. 18. Fine, but colder: moon wading. 



19. Fair, but threatening change. 20. Rain a.m. : rain also p.m. 21. Heavy 

 showers all day. 22. Heavy showers a.m. : cleared, but moist. 23. Very fine, 

 after showers in the night. 24. Fine harvest day. 25. Fair, but cloudy : 

 cleared p.m. 26. Rain during night and morning : cleared. 27. Succession of 

 heavy showers : flood. 28. Heavy rain during night: ditto day. 29. Rain and 

 hail p.m. 30. Showers. 



Mean temperature of the month c 51° - 65 



Mean temperature of Sept. 1849 53 *5 



Mean temperature of Sept. for the last twenty-eight years... 53 *17 



Average rain in Sept. for twenty-three years 3*13 inches. 



Sandioick Manse, Orkney. — Sept. 1. Drizzle: showers. 2. Rain. 3. Clear: 

 cloudy. 4. Showers: damp. 5. Showers. 6. Fine. 7. Fine: aurora. 8. Fine: 

 cloudy. 9. Fine: cloudy. 10. Cloudy: aurora. 11. Fine: fog. 12. Fine: 

 cloudy: clear : aurora. 13. Fine: cloudy. 14. Clear : aurora. 15. Hazy: 

 aurora. 16. Fine: hazy: fine. 17. Fine. 18. Fine: cloudy. 19. Cloudy. 



20. Cloudy: drops. 21. Cloudy : rain. 22. Bright: rain. 23. Showers: cloudy. 



24. Cloudy : clear. 25. Bright : clear. 26. Hazy : clear. 27. Bright : clear. 



28. Rain : showers : aurora. 29. Bright : showers : clear : aurora. 30. Showers : 

 aurora. 



