Meteorological Observations, 



79 



lie, or even we believe instituted, with the Actinometer, an instru- 

 ment which we are glad to see appreciated by distant observers. 



SOLAR RADIATION. 



REMARKS. 



DAY & HOUR 



2 



3 



4 



WEATHER. 



These observations were made during the 

 warmest and brightest days of July, on the 

 Montreal mountain, place of observation 

 307 feet above St. Lawrence. The first co- 

 lumn gives the day and hour ; the second, 

 the indication of Sir John Herschel's Acti- 

 nometer, — by Robinson, London,— mean of 

 three observations ; the third, the tempera- 

 ture of air in the shade, Thermometer 5 feet 

 above the earth ; the fourth, the indication 

 of the Thermometer placed in the sun on 

 garden mould, not blackened, after an ex- 

 posure often minutes. N.B. This Actino- 

 meter was, in Sept. 1837, compared on the 

 same spot, with one in the possession of Dr. 

 Daubeny, of Oxford, England, and gave 

 similar indications. 



July 19 



26 

 27 



28 



29 

 Aug. 2 



A.M. 



10,30 



11,00 



11,30 



Noon. 



12,30 



1,30 



Noon. 



4 P. M 



Noon. 



3 P. M 



Noon. 



Noon. 



19-50 

 17-62 

 19-50 

 20*00 

 20-00 

 20-00 

 14-67 

 17-07 



19*05 

 19-50 

 19*80 

 17-30 



68 



69 



69-5 



71 



73 



73 



71 



77 



77 



78 



83 



73 



114 

 122 

 118 

 120 

 116 



"94" 



"98" 



101 



105 



100 



Clear. 



A few light clouds. 



Clear. 



Fleecy clouds. 



Perfectly clear. 



Clear. 



Clear, blowing fresh. 



Clear. 



Clear. 



Clear. 



Clear, fresh breeze. 



Clear. 



TERRESTRIAL RADIATION. 





DAY. 



2 



3 



4 



Wind 





The first column indicates the 24 hours 

 during which the observation was made, 

 reckoning from 9 A.M. of one day to 9 A.M. 

 of the next ; the second gives the max. of 

 the Thermometer in the shade, for the 

 same period; thethird, the min.; the fourth, 

 the indications of a register spirit Thermo- 

 meter, placed on a grass plat and exposed 

 freely to the heavens during the night. All 

 these instruments are made by first ar- 

 tists, British, and carefully compared with 

 standards. 



| 



July.. 1 18 to 19 

 19 to 20 



22 to 23 

 126 to 27 

 '27 to 28 

 28 to 29 

 Aug.. 6 to 7 



69 

 73 



71 

 73 



78 

 SO 

 76 



60 

 54 

 55 

 61 

 69 

 70 

 69 



50 

 50 

 50 

 49 

 62 

 65 

 63 



NW. 

 do. 

 N. 

 SE. 



sw. 

 sw. 

 sw. 



Clear. 



do. 



do. 



4o. 



do. 

 Showery. 

 Clear. 



METEOROLOGICAL OBSERVATIONS FOR MAY, 1840. 

 ChiswicJc. — May 1. Slight haze : fine. 2 — 4. Hot and dry with easterly wind. 



5. Overcast. 6, 7. Slight haze. 8. Heavy showers : fine. 9. Rain with sultry 

 intervals. 10. Cloudy: sultry. 11. Drizzly. 12. Overcast. 13. Rain: sultry. 



14. Cloudy and fine. 15. Heavy rain with thunder. 16. Cloudy : showery : 

 hail shower at 12| p.m. 17. Rain. 18. Cloudy and fine: rain. 19, 20. Cloudy 

 and cold. 21. Clear and cold. 22. Overcast. 23. Clear and fine. 24. Over- 

 cast : rain. 25. Cloudy. 26. Rain. 27—30. Very fine. 31. Hot and dry : 

 cloudless. 



Boston. — May 1. Cloudy. 2 — 4. Fine. 5, 6. Cloudy. 7, 8. Cloudy : rain 

 early a.m. : rain p.m. 9. Rain: rain early a.m. 10. Cloudy: rain early a.m. 

 11. Rain : rain early a.m. 12. Cloudy : rain early a.m. 13. Rain. 14. Cloudy : 

 rain with thunder and lightning p.m. 15. Rain. 16,17. Cloudy: rain a.m. 

 and p.m. 18, 19. Cloudy. 20. Cloudy : rain p.m. 21, 22. Stormy. 23, 24. 

 Cloudy. 25. Stormy ; rain a.m. 26. Rain : rain a.m. 27. Cloudy. 28. Fine. 

 29. Stormy. 30, 31. Fine. 



Applegarth Manse, Dumfries-shire. — May 1, 2. Beautiful day. 3. The same : 

 Thermometer in shade 75°. 4. Very dry and warm till p.m. 5. Very droughty. 



6. The same increased : cloudy. 7. Slight showers all day. 8. The sam§ a.m.: 

 cleared up. 9. Slight showers early a.m. 10. The same : thunder p.m. 11. 

 Rain heavier. 12. Rain nearly all day. 13. Fair. 14. Showery p.m. : thunder. 



15. Occasional showers : thunder. 16. Rain preceding night: clear day. 17. 

 Rain in the night : fair. 18. Fresh and cool. 19. Dry and rather boisterous. 

 20. Dry and more moderate. 21. Very droughty : clear sky. 22. Calm and 

 warm. 23. Showery : high wind. 24. Showery. 25. Showery, and very high 

 wind. 26. Fresh and showery. 27. Fine a.m. : wet p.m. 28. Very wet till 

 p.m. 29, 30. Fine growing day. 31. Variable : bright at midday ; wet evening. 



