Meteorological Observations for August 1827. 319 



Clouds. 

 Cirrus. Cirrocumulus. Cirrostratus. Stratus. Cumulus. Cunmlostr. Nimbus. 



21 12 29 25 25 13 



Scale of the prevailing Winds. 

 N. N.E. E. S.E. S. S.W. W. N.W. Days. 

 8 7^ 1 1 3 4^ 2 4 31 



General Observations. — The month has been generally fine and dry, with 

 occasional gales of wind ; and the quicksilver in the barometer has been 

 pretty uniform in its elevations and depressions. 



In the evening of the 9th instant, lunar hghts and shades were observed 

 here in front of a dark cirrostraiive cloud near the horizon ; they were 

 produced by the moon's rays passing through several apertures in the cloud, 

 and were almost as conspicuous as the solar lights and shades that are 

 sometimes produced by the same means. 



On the 15th upwards of an inch of rain fell, mostly in the night, which 

 was brought on by the inosculation of two winds, the lower one from the 

 S.W., and the upper one from the North, and for three or four days in the 

 middle of the month it also rained ; but bince that time none measurable 

 has fallen, consequently an abundant corn-harvest has been got-in in this 

 county to the satisfaction of the farmers in general. 



Although the mean temperature of the external air this month is one 

 degree and one-fifth lower than the mean of August for the last eleven 

 years, arising from the cold nights; yet the uniform dryness of the air and 

 hot sunshine have been very favourable for ripening the corn and fruits, 

 M'ith very little loss sustained by the few wet days. 



The atmospheric and meteoric phcenomena that have come within our 

 observations this month, are fourteen meteors, frequent thunder on the 

 IGth and 17th in the day-time, sheet-lightning in the evening of the 23rd; 

 and six gales of wind, or days on which they have prevailed, namely, three 

 from the N., one from N.E., and two from the S.W. 



REMARKS. 



London.— kag. 1, 2. Sultry. 3. Rain during the night. A. Showers. 

 5 — 9. Fine. 10. A thunder storm at noon with heavy showers of rain. 

 11, Showery, with thunder. 12 — 15. Cloudy. 16. Showery. 17. A thun- 

 der storm at 3 P.M. ; showery. 18 — 20. Fine. 21.(;loudy: with showers. 

 22. Cloudy. 23. Fine. 24. Cloudy. 25. Showers. 2G. Showery. 27. 

 Cloudy and fine. 28, 29. Fine. 30, 31. Cloudy. 



Penzance. — Aug. 1. Clear. 2,3. Fair showers. 4 — 6. F'air. 7, 8. Clear. 

 9. Clear: rain at night. 10. Cleai-. II. Showers. 12. Clear, l."?. Showers 

 14. Rain: fair. 15, 16. Fair: rain. 17. Rain. 18. Fair: showers. 19. Clear. 

 20. Fair : light showers. 21. Showers: fair. 22 — 26. Clear. 27, 28. Fair. 

 29 — 31. Clear. — Rain guage ground level. 



Boston. — Aug. 1 — 3. Fine. 4 — 6. C'loudy. 7 — 9. Fine. 10. Rain: 

 with thunder and lightning, 1 p.m. 11. Fine: rain, r.M. 12, 13, Fine. 

 1 4. Cloudy : rain a.m. 1 5. Cloudy : rain, a.m. and p.m. 1 6. Fine : rain, 

 P.M. 17. Cloudy. 18. Cloudy: rain, a.m. 19. Cloudy. 20. Rain. 21, 

 22. Cloudy. 23. Fine. 24. Cloudy: rain at night. 25,26. Cloudy. 

 27. Fine, 28. Cloudy. 29. Fine. 30. Fine: rain, p m. 31, Cloudy. 



RESULTS. 



Winds, NE. 7 : E. I : SE. 4 : SW. 6 : NW, 13, 



London. — Raromcter: Mean of the month.,,.. 30'147inch, 



Thermometer: .Mean of the month 61'4I9° 



Evaporation 3-93 inch. 



Rain 199, 



Meteoro- 



