Meteorological Observations. 569 



"6 



be subtracted 1 equivalent of nitrous aether and 1 equivalent of water, 

 the remaining elements represent the composition of cacotheline. 



When cacotheline is subjected to the action of ammonia it is con- 

 verted into various products, among which is an alkaline base pos - 

 sessing several remarkable properties. It contains the elements of 

 the vapour of nitrous aether, and acts, when heated, like substances 

 which have undergone substitution by hyponitrous acid. The small 

 quantity which M. Laurent possessed did not permit an analysis. — 

 Journ. de Pharm. et de Ch., Aout 1846. 



METEOROLOGICAL OBSERVATIONS FOR OCT. 1846. 



Chiswick. — October 1. Foggy: fine: overcast. 2. Hazy: very fine: rain. 3, 

 4. Very fine. 5. Cloudy. 6. Overcast : rain. 7. Fine : rain. 8. Clear : 

 cloudy : rain. 9. Rain. 10. Boisterous : rain. 11. Fine: rain. 12. Foggy. 

 13. Slight rain : cloudy : clear. 14. Densely overcast : heavy rain. 1.5. Rain: 

 cloudy : clear. 16. Clear: fine: rain at night. 17. Slight fog. 18. Heavy 

 and continued rain. 1 9. Foggy : cloudy and fine : clear. 20. Hazy : very fine : 

 clear. 21. Heavy rain : boisterous. 22. Cloudy : boisterous. 23. Fine: clear: 

 slight frost at night. 24. Rain: fine: rain. 25. Cloudy. 26. Foggy. 27. Hazy: 

 fine : foggy at night. 28. Dense fog. 29. Cloudy : slight rain. 30. Hazy : 

 overcast: clear. 31. Foggy. 



Mean temperature of the month 50 0, 37 



Mean temperature of Oct. 1845 49 *96 



Average mean temperature of Oct. for the last twenty years . 50 '43 

 Average amount of rain in Oct 2*58 inches. 



Boston. — Oct. 1. Fine. 2. Cloudy and foggy : rain a.m. and p.m. 3. Cloudy. 



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

 Rain : rain early a.m. : rain a.m. 10. Stormy. 11. Fine : rain p.m. 12. Cloudy: 

 rain p.m. 13. Windy. 14. Rain : rain a.m. and p.m. 15. Fine. 16. Fine: 

 rain early a.m. 17. Cloudy : rain early a.m. 18. Cloudy : rain a.m. and p.m 

 1*9. Fine. 20. Rain : rain early a.m. 21. Rain and stormy : rain early a.m. : 

 rain a.m. 22. Cloudy : rain p.m. 23. Cloudy. 24. Rain : rain early a.m. 

 25. Fine. 26 — 28. Foggy. 29. Cloudy. 30, 31. Foggy. — The past month 

 has been an extraordinary moist one. 



Sandivick Manse, Orkney. — Oct. 1, 2. Cloudy : clear. 3. Bright : clear. 4, 



5. Bright : hazy. 6. Cloudy : rain. 7. Clear : hazy : aurora. 8. Bright : clear. 



9. Bright: rain. 10. Rain: cloudy. 11. Bright: rain. 12. Cloudy: showers. 

 13. Cloudy. 14. Rain. 15. Rain : showers : aurora. 16. Bright : clear : aurora. 

 17. Fine: damp. 18. Bright: cloudy. 19. Rain: cloudy: aurora. 20. Bright: 

 cloudy. 21. Cloudy : rain. 22. Bright: showers: aurora. 23. Showers: cloudy. 

 24. CloHdy : showers : aurora. 25. Bright : clear : aurora. 26. Frost : cloudy. 

 27. Frost: bright : clear : aurora. 28. Cloudy. 29,30. Rain : drops. 31. 

 Showers : cloudy. 



Applegarth Manse, Dumfries-shire. — Oct. 1. Rain a.m.: cleared : fine. 2,3. 

 Fair and fine. 4. Fair, but raw : threatening. 5. Showers. 6. Violent showers 

 p.m. 7. Violent showers p.m. : thunder. 8. Violent showers p.m. 9. Rain all day. 



10. Showers. 11. Rain p.m. 12. Showers. 1*3. Fine and fair. 14. Heavy 

 rain. 15. Fair and fine. 16. Rain p.m. : thunder. 17. Slight showers. 18. 

 Slight showers p.m. 19. Frequent showers. 20. Showers a.m. : cleared. 21. 

 Showers a.m. 22, 23. Fair. 24. Heavy rain. 25. Fair and clear. 26. Frost : 

 clear. 27. Frost : cloudy. 28. Fair and fine. 29. Slight showers. 30. Rain 

 a.m. : cleared. 31. Slight shower p.m. 



Mean temperature of the month 49 0, 5 



Mean temperature of Oct. 1845 49 # 6 



Mean temperature of Oct. for twenty-three years 46 "4 



Mean rain in Oct. for eighteen years 3 J inches. 



Phil. Mag. S. 3. No. 1 97. Suppl. Vol. 29. 2 Q 



