Meteorological Observations for July 1827. 239 



General Observations. — This month has been remarkably fine, dry, and 

 generally calm, but not hot for the season, except on the 7th and 8th, on 

 which days the thermometer in the shade rose to 80 degrees. No mea- 

 surable rain fell here from the 4th to the lJ)th, and the refreshing showers 

 on two or three days afterwards were found very beneficial to the herbage, 

 fruit, and corn crops. From the uniformly fair weather ihe mean barome- 

 trical pressure is high for this period ; and on many serene evenings the sky 

 round the horizon at sunset was tinged with light blue, surmounted by light 

 red and yellow, the brightest colours being opposite to the sun ; but the 

 evening twilight reflected richer tints upon the surrounding water, and the 

 setting sun was frequently followed by small orange-coloured arcs, which 

 indicated a continuance of fair weather. 



On the 2!)th, sheet lightning appeared soon after sunset, between the 

 N.W. and S.E. points, and emanated in quick succession from low cirro- 

 strati ve clouds through the night. These clouds appeared at noon in the 

 character of descending cirri : they afterwards transformed into cirrostrati, 

 and were wafted in the evening to the western horizon by a brisk easterly 

 wind under very hot sunshine, by which means they acquired much electri- 

 cal matter. 



The mean temperature of the external air this month is nearly one de- 

 gree higher than the mean of July for the last eleven years. 



The wheat harvest has just commenced in this neighbourhood, (August 

 the 2nd) and from appearances here, and reports from all parts of the 

 country, the crops will be both abundant and of good quality. 



The atmospheric and meteoric phcBnomena that have come within our 

 observations this month, are one lunar and two solar halos, six meteors, 

 lightning and thunder in the night of the 29th; and four gales of wind, or 

 days on which they have prevailed, namely, two from the S., one from 

 S.W., and one from the West. 



REMARKS. 



ionrfon.— July 1. Cloudy. 2. Rainy morning. 3. Fine. 4. Showers. 



5, 6, Fine. 7. Fine: clear." 8 — 15. Fine. 16. Cloudy and fine. 17. Fine. 

 18. Cloudy. 19. Cloudy: showery. 20. Cloudy: fine. 21. Cloudy. 

 22. Rainy. " 23, 24. Cloudy. 25, 26. Cloudy and fine. 27. Cloudy. 28. Fine. 



29. Sultry. 30. A thunder storm at 4 a.m. ; windy day. 31. Cloudy. 



Boston. — July 1. Rainy. 2. Cloudy: rain a.m. and p.m. 3 — 5. Fine. 



6. Fine: thermom. 78° 4 p.m. 7. Cloudy. 8, 9. Fine. 10. Fine : therm. 

 79° i past 2 P.M. 11 — 17. Fine. 18. Cloudy. 19. Fine. 20. Cloudy: 

 rain A.M. 21. Cloudy. 22. Fine. 23. Cloudy. 24. Fine. 25, 26. Cloudy : 

 rain p.m. 27. Fine. 28. Fine: thermom. 81-5 3 p.m. 29.Fine. 30. Fine: 

 thunder and lightning from 3 to 7 a.m. with rain, stormy, p.m. 31. Fine. 



PeHZflHw.— July 1. Heavy showers. 2. Rain: fair. S.Clear. 4. Misty 

 rain. 8. Clear. 9 — 11. Fair. 12 — 18. Clear. 19. Rain. 20. Fair : showers. 

 2). Fair: clear. 22. Rain. 23. Showery. 24. Misty. 25. Showers. 26. Misty 

 rain. 27. Rain. 28. Fair. 29. Heavy clouds, thunder and lightning. 



30. Clear. 31. Fair. — Rain guage ground level. 



RESULTS. 



London. — l^aronieter: Mean of the month 30-222inch. 



'I'hcrinoineter : Mean of the month 65'950° 



Kvaporatiou « 4-70 inch. 



Rain 1-37. 



Mdcoro- 



