Meteorological Observations. 79 



them belong on the one side to a cell of a certain age, on the other 

 to a cell of the preceding cycle. 



The fact is proved by the development of the intestiniform masses 

 borne by the free margins of the partitions in the ventral cavity. The 

 six first pairs of bundles are developed on the twelve partitions, which 

 bound the six primitive cells, corresponding to the six first tentacles ; 

 six other pairs are then developed upon the twelve dissepiments of 

 the six cells of the second cycle ; and afterwards twelve pairs appear 

 on the twenty-four partitions of the third cycle. It is easy to see 

 that the nearer the bundles approach the centre, the older they are. 



All the work of division appears to go on in the central portion of 

 the embryo, whilst the envelope, which forms a regular cutaneous 

 layer, is gradually enlarged without taking any part in the formation 

 of the partitions. — Comptes Rendus, August 28, 1854, p, 434. 



METEOROLOGICAL OBSERVATIONS FOR NOV. 1854. 



Chiswick. — November 1. Dense fog: very fine. 2. Foggy: hazy: very fine. 

 3. Fine : clear. 4. Overcast : fine. 5. Cloudy. 6. Clearand very fine. 7. Foggy : 

 cloudy. 8. Overcast : fine. 9. Clear and cold : sharp frost : rain. 10. Fine, but 

 cold : rain. 11. Shght rain : cloudy: fine. 12. Fine : frosty at night. 13. Foggy : 

 fine. 14. Densely clouded : heavy rain. 15. Heavy rain: fine: rain. 16. Rain: 

 foggy at night. 17. Foggy: rain: overcast. 18. Densely overcast and windy. 

 19. Overcast : clear and cold. 20. Cloudy: clear and cold : fine. 21. Overcast. 

 22. Clear : densely clouded : clear. 23. Fine : cloudy : sharp frost. 24, 25. 

 Cloudy and cold. 26. Clear : overcast. 27. Foggy. 28. Overcast : rain. 29. 

 Cloudy and fine. 30. Clear : rain at night. 



Mean temperature of the month 39°*35 



Mean temperature of Nov. 1853 40*14 



Mean temperature of Nov. for the last twenty-eight years ... 43 '07 

 Average amount of rain in Nov 2*38 inches. 



Boston. — Nov. 1. Fine. 2. Cloudy. 3. Fine. 4. Fine : rain p.m. 5. Cloudy. 

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

 11. Fine. 12. Fine : rain p.m. 13. Cloudy. 14. Cloudy: rain a.m. 15,16. 

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

 and P.M. 20. Cloudy. 21. Cloudy : rain a.m. and p.m. 22, 23. Cloudy. 24, 

 25. Cloudy : rain a.m. and p.m. 26, 27. Fine. 28. Cloudy : rain p.m. 29. Fine 

 rain a.m. 30. Cloudy. 



Sandwiek Manse, Orkney. — Nov. 1. Showers a.m. : cloudy p.m. 2. Rain a.m : 

 clear p.m. 3. Bright a.m. : showers p.m. 4. Cloudy a.m. : rain p.m. 5, Cloudy 

 A.M. and P.M. 6. Cloudy a.m. : showers p.m. 7. Showers a.m. and p.m. 8. 

 Showers a.m. : snow-showers p.m. 9. Snow-showers a.m. : sleet-showers p.m. 

 10, 11. Cloudy A.M. : clear p.m. 12, 13. Cloudy a.m. and p.m. 14. Cloudy a.m. : 

 cloudy, drops p.m. 15. Showers a.m. and p.m. 16. Showers a.m : rain p.m. 

 17. Drizzle a.m. : damp p.m. 18. Fine, cloudy a.m. : showers p.m. 19. Fine, 

 cloudy A.M. : clear p.m. 20. Damp a.m. : showers p.m. 21. Showers a.m. and 

 P.M. 22. Rain a.m. : showers, aurora p.m. 23. Clear, frost a.m. : snow-showers 

 frost P.M. 24. Snow a.m. and p.m. 25. Snow, thaw a.m. : thaw, rain p.m. 26. 

 Fog A.M. : cloudy p.m. 27. Cloudy a.m. : showers, sleet p.m. 28. Showers a.m. 

 and p.m. 29. Showers a.m. : sleet-showers p.m. 30. Clear a.m. : sleet-showers 

 p.m. 



Mean temperature of Nov. for twenty-seven previous years . 42°-67 



Meai temperature of this month 42 '05 



Mean temperature of Nov. 1853 44 -87 



Average quantity of rain in Nov. for thirteen previous years 4 25 inches. 



