Meteorological Obsei~vations. 327 



its green colour and red dispersion, but in about twelve hours it 

 becomes pale and the precipitate increases. 



Nitrate of lime produces no turbidity, but the colour becomes 

 olive-green, and there is no longer any red dispersion. After stand- 

 ing twelve hours a precipitate is formed and the colour of the liquid 

 disappears. 



Muriate of alumina dissolved in alcohol gives a green turbidity, 

 and the fluid loses its colour. After standing some hours a greenish, 

 not flocculent, precipitate is formed. 



Muriatic acid strikes an olive-green colour. 



On litmus paper it has neither an acid nor an alkaline reaction. 



The green colouring matter in Euglena viridis is therefore essen- 

 tially diflferent from that of the Algae, as well as from the chloro- 

 phyll of the Phanerogamia, and of the green mosses. — PoggendoriF's 

 Annalen, vol. xc\'ii. p. 33 i. 



METEOROLOGICAL OBSERVATIONS FOR FEB. 1856. 



Chiswick. — February!. Light clouds: frosty. 2. Cloudy. 3. Frosty: fine 

 throughout. 4. Overcast : slight rain. 5. Very fine : boisterous at night. 6. 

 Densely clouded : boisterous. 7. Uniformly overcast : rain. 8. Densely over- 

 cast : fine : cloudy. 9. Exceedingly fine. 10. Cloudy. 11. Foggy : rain : over- 

 cast. 12. Rain : fine : rain at night. 13. Rain : showery throughout. 14. Rain : 

 fine. 15. Cloudy : very fine : foggy at night. 16. Foggy : very fine : foggy. 17. 

 Hazy : overcast : foggy at night. 18. Overcast : slight snovp. 19. Hazy : cold 

 and raw. 20. Cloudy and cold throughout. 21. Slight rain : small hail occa- 

 sionally. 22. Overcast : slight rain. 23. Fine throughout : cloudy at night. 

 24. Fine : overcast : clear and frosty. 25. Overcast throughout. ■ 26. Cloudy : 

 slight rain. 27. Overcast. 28. Very slight drizzle : overcast : cloudy. 29. Foggy : 

 cloudy : frosty. 



Mean temperature of the month 41°-54 



Mean temperature of Feb. 1855 28 -01 



Mean temperature of Feb. for the last thirty years 38 '71 



Average amount of rain in Feb 1543 inch. 



Boston. — Feb. 1 — 3. Flue. 4, 5. Cloudy. 6. Rain a.m. and p.m. 7, 8. Cloudy : 

 rain A.M. 9. Cloudy. 10. Cloudy : rain a.m. 11. Cloudy : rain p.m. 12. Rain 

 A.M. 13. Cloudy: rain P.M. 14, 15. Fine. 16— 22. Cloudy. 23, 24. Fine. 

 25—28. Cloudy. 29. Foggy. 



Sandivick Manse, Orkney. — Feb. 1. Cloudy a.m. : showers, thaw p.m. 2. Cloudy 

 a.m. : fine p.m. 3. Fine, bright a.m. : fine, clear p.m. 4. Fine, cloudy a.m. : 

 fine, clear p.m. 5. Fine, drops a.m. : fine, cloudy p.m. 6. Bright a.m. : rain p.m. 

 7. Bright a.m. : showers p.m. 8. Cloudy a.m. and p.m. 9. Drops a.m. : clear p.m. 

 10. Bright a.m. : clear, showers p.m. 11. Bright a.m. : clear, fine p.m. 12. Rain 

 A.M. : showers p.m. 13. Bright a.m. : cloudy p.m. 14. Snow-showers a.m. : 

 showers p.m. 15. Rain a.m. : cloudy p.m. 16. Drizzle, showers a.m. : drizzle p.m. 

 17. Damp a.m. and p.m. 18. Cloudy a.m. and p.m. 19. Cloudy, frost a.m. : 

 clear, fine p.m. 20. Bright a.m. : cloudy, fine p.m. 21. Bright a.m. : clear p.m. 

 22. Bright A.M. : showers, clear p.m. 23. Bright a.m. : cloudy p.m. 24. Cloudy 

 a.m. : clear p.m. 25. Rain a.m. : showers, clear, aurora p.m. 26. Cloudy a.m. : 

 drizzle p.m. 27. Showers a.m. : fine, cloudy p.m. 28. Drizzle a.m. : damp p.m. 

 29. Cloudy a.m. and p.m. 



Mean temperature of Feb. for previous twenty-nine years ... 38°'01 



Mean temperature of this month 40 '84 



Mean temperature of Feb. 1855 31 '64 



Average quantity of rain in Feb. for fifteen previous years ... 3'25 inches. 



The storm which raged so violently in the South of Scotland on the 6tli and 7th 



did not reach Orkney or the North of Scotland, but again we had this month as 



well as during the gale of last month a great fall of the barometer, which stood 



at 28-49 on the 6th at midnight. 



