522 Meteorological Observations. 



previously described by Spix and Martius under the name of Del- 

 p/iinus amazonicus, whilst, according to M. Paul Gervais, it is identical 

 with the D. Geoffrensis of De Blaiuville, who however supposed his 

 specimen to come from Canada. 



Besides the Inia Geofrensis, M. Gervais states that the Amazon 

 and its tributaries possess two other species of Dolphin, both, ac- 

 cording to him, belonging to the restricted genus Delphinus. They 

 will be described by him in the Zoological section of M. de Castelnau's 

 Voyage in America, under the names of D.paUidus and B.Jiuviatilis. 

 — Comptes Bendus, 28th April 1856, p. 806. 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1856. 



L'hisxficJc. — April ], 2. Exceedingly fine. 3. Overcast: rain. 4. Densely 

 clouded : fine, with low white clouds. 5. Fine : cloudy. 6. Fine : frosty at night. 

 7. Fine: cloudy: rain. 8. Rain. 9. Cloudy: rain. 10. Rain. 11. Fine: 

 showery: rain at night. 12. Rain: cloudy and mild: fine. 13. Fine: cloudy: 

 hazy. 14. Fine : raiu : boisterous, with rain at night. 15. Overcast : cold north- 

 east wind. 16. Fine, but cold : masses of white clouds. 17. Dusky white clouds: 

 fine: cloudy. 18. Overcast: fine: cloudy. 19. Overcast: densely clouded: 

 clear: frosty. 20. Fine: frosty at night. 21. Cloudless: very fine: hazy at 

 night. 22. Overcast : cloudy : frosty. 23. Slight haze : cloudy. 24. Uniform 

 haze: overcast: fine. 25. Foggy: very fine: rain. 26. Heavy rain: cloudy. 

 27. Rain. 28. Clear : fine : frosty. 29. Partially overcast : cloudy and cold. 

 30. Fine. 



Mean temperature of the month 46°'48 



Mean temperature of April 1855 46 "08 



Mean temperature of April for the last thirty years 47 "13 



Average amount of rain in April 1553 inch. 



Boston. — April 1. Fine : rain P.M. 2. Cloudy. 3. Cloudy : raiu r.M. 4. Cloudy, 

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

 10. Cloudy: rain p.m. 11. Fine: rain p.m. 12. Rain a.m. and p.m. 13. Fine. 

 14. Cloudy. 15. Fine. 16—19. Cloudy. 20. Fine. 21—24, Cloudy. 25. Fine. 

 26. Rain a.m. and p.m. 27. Cloudy. 28. Cloudy; rain p.m. 29. Cloudy: 

 rain a.m. and p.m. 30. Cloudy. 



Sandwick Manse, Orkney. — April 1 — 3. Bright a.m. : cloudy p.m. 4. Cloudy, 

 drops A.M. : clear, aurora p.m. 5. Cloudy, drops a.m. : clear p.m. 6. Damp a.m. : 

 clearp.M. 7. Bright a.m. : drops p.m. 8 — 10. Cloudy a.m. and p.m. 11. Showers, 

 cloudy A.M. : clear p.m. 12 — 14. Cloudy a.m. and p.m. 15. Cloudy a.m. : clear, 

 fine p.m. 16. Cloudy a.m. and p.m. 17. Showers, cloudy a.m. : cloudy p.m. 

 18. Showers, cloudy A.M. : clear, fine p.m. 19. Clear a.m. : drizzle p.m. 20 — 22. 

 Cloudy A.M. and p.m. 23. Clear a.m. : cloudy p.m. 24. Cloudy a.m. : cloudy, 

 fine P.M. 25. Cloudy, fine a.m. : cloudy, drops p.m. 26. Clear a.m. : hail- 

 showers p.m. 27. Hail-showers A.M. : sleet-showers p.m. 28. Sleet-showers a.m. 

 and p.m. 29. Sleet-showers a.m. : cloudy p.m. 30. Bright a.m. : cloudy p.m. 

 Mean temperature of April for previous twenty-nine years ... 43°'47 



Mean temperatuie of this month 44 "56 



Mean temperature of April 1855 43 '20 



Average quantity of rain in April for fifteen previous years ... 1*90 inch. 

 The drought is quite unprecedented, only -68 of rain having fallen for two months. 



