Meteorological Observations. 251 



between the elastic force and the attraction of the molecules to change 

 at every moment. When nature is contemplated on these principles, 

 it appears simple in its manifestations, grand and sublime in its re- 

 sults, always consistent with itself. 



We next have, in the memoir itself, the application of these theo- 

 retical views to the explanation ; — 1, of combustion ; 2, of the expan- 

 sions and the contractions of bodies, and the changes in their condi- 

 tion; 3, of the capacity of bodies for heat, specific heat and latent heat ; 

 4, of the spheroidal state of liquids ; 5, of irradiation ; and lastly, 6, 

 of electro-magnetic currents. The more I study, the more I medi- 

 tate profoundly upon the phsenomena of nature, the more I feel 

 convinced that nothing is so simple and fertile as this dynamic sy- 

 stem. — Comptes Rendus, May 19, 1851. 



METEOROLOGICAL OBSERVATIONS FOR JULY 1851*. 



Chiswick. — July 1. Hazy and mild : rain : cloudy and fine : thunder and light- 

 ning, with very heavy rain. 2. Fine : very fine : clear. 3. Uniformly overcast: 

 cloudy and fine : densely clouded. 4. Overcast: very fine : clear, 5 — 7. Very 

 fine. 8. Cloudy: rain. 9. Cloudy and fine. 10. Rain. 11,12. Very fine. 



13. Cloudy and fine : overcast : rain. 14. Cloudy : windy. 15. Fine : windy : 

 slight rain. 16,17. Very fine. 18, Cloudy. 19. Fine: rain: constant heavy 

 rain in the evening. 20. Cloudy and fine. 21. Very fine. 22. Dry haze : very 

 fine. 23. Rain. 24. Heavy rain. 25, 26. Very fine. 27. Cloudy and fine. 

 28. Cloudy: rain. 29. Very fine. 30. Foggy : very fine. 31. Hazy: overcast. 



jMean temperature of the month 60°'71 



Mean temperature of July 1850 61 "91 



Mean temperature of July for the last twenty-five years . 63 '13 

 Average amount of rain in July 2*30 inches. 



Boston. — July 1,2. Fine. 3, Cloudy. 4, 5. Fine. 6, 7. Cloudy. 8. Cloudy: 

 rain A.M. and P.M. 9. Rain : rain a.m. 10 — 12. Cloudy. 13. Fine : rain p.m. 



14. Cloudy: rain a.m. and p.m. 15, 16. Cloudy. 17. Cloudy: rain with 

 thunder A.M. 18. Fine. 19. Fine : rain p.m. 20. Cloudy : rain a.m. 21. Fine: 

 rain P.M. 22. Fine. 23. Cloudy: rain a.m. and p.m. 24. Rain: rain a.m. 

 and P.M. 25. Cloudy : rain a.m. and p.m. 26. Cloudy : rain p.m. 27. Fine. 



28. Rain: rain early A.M. 29. Cloudy: rain p.m. SO. Cloudy. 31. Cloudy: 

 rain p.m. 



Sandwick Manse, Orkney. — July 1. Fog. 2. Cloudy: clear. 3. Clear. 4. 

 Cloudy : drizzle. 5. Damp : clear. 6. Damp : drizzle. 7. Drizzle : rain. 

 8. Bright: clear. 9. Bright: clear: fine. 10. Drops. 11. Showers: fog. 

 12. Rain. 13. Cloudy : rain. 14. Damp. 15. Drizzle : rain. 16. Cloudy. 

 17. Damp: drizzle. 18. Bright: fine. 19. Fine. 20. Bright: rain. 21. Drizzle: 

 rain : cloudy. 22. Bright : clear : fine. 23. Fine : clear : fine. 24. Cloudy : fine. 

 25. Cloudy : drizzle. 26. Cloudy : rain. 27. Drizzle : fine. 28. Rain : cloudy. 



29, SO. Cloudy. 31. Rain : drizzle. 



* The observations from the Rev. W. Dunbar of Applegarth Manse have 

 not reached us. 



