Meteorological Observations* 319 



vation. I cannot but express some surprise at being quoted by 

 Signor Matteucci on a subject which I have not touched upon; 

 whilst, on so many important occasions, this author seems to have 

 been quite unacquainted with the real results I have obtained in 

 electro-physiology. 



I am, Gentlemen, 



Your obedient Servant, 

 Berlin, 21 Carlstr. Emil du Bois-Reymond. 



August 25, 1850. 



METEOROLOGICAL OBSERVATIONS FOR AUG. 1850. 



Chiswich. — August 1. Hazy. 2. Densely overcast : slight haze : clear. 3,4. 

 Fine. 5, 6. Very fine. 7. Very fine : rain at night. 8. Cloudy : slight rain. 



9. Fine. 10. Fine: drizzly. 11. Fine. 12. Fine: thunder : clear at night. 

 13. Heavy clouds : very fine: lightning at night. 14. Cloudy: very fine. 15. Slight 

 rain : cloudy : clear. 16. Very fine. 17, 18. Cloudy and fine. 19. Boisterous, 

 with dry air: clear. 20. Fine. 21. Overcast: heavy rain: frosty at night. 



22. Clear and fine. 23,24. Cloudy: fine: clear. 25. Overcast : drizzly. 26. 

 Slight rain. 27. Fine. 28. Very fine. 29. Clear and fine. 30. Very fine. 

 31. Overcast. 



Mean temperature of the month 59°*38 



Mean temperature of Aug. 1849 62 '91 



Mean temperature of Aug. for the last twenty-four years ... 62*18 

 Average amount of rain in Aug. 2*41 inches. 



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

 rain with thunder and lightning p.m. 9. Cloudy : rain a.m. and p.m. 10. Cloudy. 

 11. Fine. 12. Fine: rain p.m. 13. Cloudy: rain a.m. and p.m. 14. Fine. 

 15. Cloudy. 16. Fine. 17. Cloudy. 18. Fine. 19. Cloudy : stormy. 20. 

 Fine: stormy. 21. Fine. 22. Fine: rain p.m. 23,24. Fine. 25. Cloudy: 

 rain p.m. 26. Fine. 27. Cloudy : rain p.m. 28— -30. Fine. 31. Cloudy. 



Applegarth Manse, Dumfries-shire. — Aug. 1. Slight shower at night : fine day. 

 2. Slight drizzle : fine day. 3. Fair and fine, though cool. 4. Heavy rain and 

 high wind. 5. Fine a.m. : rain p.m. 6. Fair and fine a.m. : shower p.m. 7. 

 Fair and fine : rain p.m. 8. Rain a.m. : cleared : rain p.m. 9. Rain : cleared p.m. 



10. Rain p.m. 11. Rain. 12. Rain: fine p.m. 13. Fair and fine. 14. Fair: 

 sultry. 15. Warm: sultry. 16. Fair : slight drizzle. 17. Fine : slight drizzle. 

 18. Wet nearly all day. 19. Shower : stormy. 20. Showers short and frequent. 

 21. Fine harvest day. 22. Showery: hail: cool. 23. Fair till 5 p.m. : rain 

 heavy. 24. Frequent showers : hail. 25. Wet day : cleared p.m. 26. Fine 

 harvest day : slight shower. 27. Heavy rain all day : flood. 28. Fine harvest 

 morning : one shower. 29. Fine harvest morning : fair all day. 30. Fine har- 

 vest morning. 31. Slight drizzle a.m. : cleared. 



Mean temperature of the month 55°*1 



Mean temperature of Aug. 1849 56*7 



Mean temperature of Aug. for twenty-eight years 57 "0 



Rain (average) for twenty- three years in Aug 3*60 inches. 



Sandwich Manse, Orkney. — Aug. 1. Clear : cloudy. 2. Bright : cloudy. 3. 

 Showers : cloudy. 4. Rain : clear. 5. Cloudy : clear. 6. Clear. 7. Clear : 

 fine : cloudy. 8. Rain : thunder-showers. 9. Cloudy : rain. 10. Fog : fine. 



11. Rain: cloudy. 12. Fine : hot: fine. 13. Fine. 14. Fine: cloudy : fine. 

 15. Damp : cloudy : fine. 16. Cloudy. 17. Bright: cloudy. 18. Showers: 

 cloudy. 19,20. Showers. 21. Bright : clear. 22. Bright : rain and thunder. 



23, 24. Showers. 25. Rain : drizzle. 26. Showers : drizzle : showers. 27. 

 Damp : rain. 28. Showers : rain. 29. Showers. 30. Cloudy : rain. 31. 

 Showers. 



