Meteorological Observations. 247 



SCIENTIFIC MEMOIRS. 



Part XVI. of this publication, completing vol. iv., will appear in 

 the course of this month, and will contain the following articles : — 

 Midler on the Structure and Characters of the Ganoids, and on the 

 Natural Classification of Fish ; Regnault on the Elastic Forces of 

 Aqueous Vapour ; Regnault's Hygrometrical Researches ; Berzelius 

 on the Composition of Organic Substances ; Fresnel on the Colours 

 produced in Homogeneous Fluids by Polarized Light, &c. 



METEOROLOGICAL OBSERVATIONS FOR JULY 1846. 



Chiswick. — July 1. Fine : cloudy. 2. Densely clouded. 3. Cloudy : clear and 

 fine. 4. Sultry : hot and dry. 5. Excessively hot : showers : cloudy. 6. Fine: 

 heavy showers. 7. Overcast, and fine. 8. Overcast : rain. 9. Overcast : heavy 

 rain. 10. Showery. 11. Overcast: light clouds and fine. 12. Clear and fine. 

 13. Cloudless and hot. 14. Hot breeze. 15. Overcast: fine. 16. Rain: 

 densely overcast. 17. Cloudy and fine. 18. Constant rain: cloudy and fine. 

 19. Showers. 20. Very fine. 21. Fine: cloudy. 22. Hot and dry. 23. Cloudy : 

 clear and fine. 24. Overcast i rain. 25, 26. Very fine. 27 — 29. Cloudy and 

 fine. SO, 31. Very hot, 



Mean temperature of the month 65 0, 46 



Mean temperature of July 1845 61 "43 



Mean temperature of July for the last twenty years ... 62 *96 



Average amount of rain in July 2'38 inches. 



Boston. — July 1, Fine: rain p.m. 2. Fine. 3. Cloudy : 3 o'clock p.m. ther- 

 mometer 80°. 4. Fine : 4 o'clock p.m. thermometer 84°. 5. Fine: 10 o'clock a.m. 

 thermometer 87°: 12 o'clock a.m. 90° : hail and rain, with thunder and lightning, 

 accompanied with a tremendous wind p.m.* 6. Windy: rain p.m. 7. Windy. 

 8, Cloudy : rain p.m. 9. Rain : rain p.m. 10. Rain. 11. Cloudy. 12. Fine. 

 13. Cloudy. 14. Fine: 3 o'clock p.m. thermometer 81°. 15. Fine. 16. Fine: 

 rain p.m. 17. Fine. 18. Cloudy : rain p.m. 19. Cloudy. 20. Fine. 21. Cloudy: 

 rain p.m. 22, 23. Cloudy. 24. Cloudy: rain p.m. 25, 26. Fine. 27. Cloudy: 

 rain early a.m. 28. Cloudy: 2 o'clock p.m. thermometer 81°. 29 — 31. Fine.— 

 I cannot find so hot a month in all my journal except last month. 



Sandwich Manse, Orkney. — July 1. Cloudy. 2. Cloudy : rain : clear. 3. Rain : 

 cloudy. 4. Drizzle : clear. 5. Cloudy : rain. 6. Cloudy : drizzle : showers. 

 7. Drizzle: showers. 8. Bright: clear. 9. Cloudy: clear. 10. Bright: cloudy. 

 11. Cloudy: rain. 12. Fog. 13. Fog: rain. 14. Cloudy. 15. Showers: 

 clear. 16. Bright : clear. 17. Cloudy: showers. 18. Bright : drizzle. 19. 

 Showers : clear. 20, 21. Bright : showers. 22. Fog : showers : clear. 23. Cloudy: 

 drops : clear. 24. Cloudy : clear. 25. Bright : drops. 26. Clear : cloudy. 

 27. Bright : cloudy. 28. Showers : clear. 29. Clear : fine. 30. Bright : line. 

 31. Fog: line. 



Applegarth Manse, Dumfriesshire. — July 1. Showers all day. 2. Showers a.m. : 

 fine p.m. 3. Wet morning : cleared. 4. Fair and fine. 5. Fine a.m. : thunder 

 and rain p.m. 6. Tremendous rain. 7. Very fine, 8. Rain p.m. 9. Rain. 

 10. Fair and fine. 11. Fine: slight drizzle. 12. Wet morning: cleared. 13. 

 Fair, but threatening. 14. Very fine. 15. Showers p.m. 16*. Showery. 17. Fine: 

 showers. 18. Slight showers. 19. One slight shower. 20. Fine ; slight shower. 

 21,22. Showery all day. 23. Wet all day. 24. Showers. 25. Fair and fine. 

 26. Rain p.m. 27. Drizzly. 28. Dropping day. 29 — 31. Fine : fair. 



Mean temperature of the month ,,.,,.,.. 59° - 2 



Mean temperature of July 1845 ,..,..,,..,.... 56 '2 



Mean temperature of July for 23 years 58 *1 



Mean rain in July for 18 years , 3'90 inches. 



Mean rain in July 5*79 „ 



* The hottest day since 31st July 1826. 



