474 Mr. Howard's Meteorological Journal. [June, 1818. 



REMARKS. 



Third Month.— 30. Hoarfrost: a breeze, variable, succeeded by Cirrus mingled 

 •with Cumulus: a few drops, p.m. 31. Fine breeze: large Cumulostrali, with a 

 few drop= of rain : clear twilight. 



Fourth Month. — 1. Fine: Cumulus passing to Cumulostratus in a brisk wind: 

 at sun-set an evaporation of the clouds, followed by dew and an orange twilight. 

 2. Cloudy morning : Cumulostratus carried in a brisk u ind through the day. 3. As 

 vesterday, with the addition of red Cirri at sun-set. 4. Much sun, with long, 

 faint, linear Cirri. 5. Hoar frost: calm: a warm sun, with much dust: Cirrus 

 increased to obscurity in the evening, and it rained by night. 6. A gale through 

 the day : calm night. 7. Wet forenoon from the eastward, p.m.: rain from the 

 SW: agale in the night. 8. Turbid sky: Cirrocumulus at nine, a. m. with the temp. 

 56°, afterwards the wind southing ; we hud showers at intervals, and a gile by 

 night. 9,10,11. Windy, with showers. 12. Cumulostratus chiefly, hut with rain 

 at intervals: in the evening the wind went to NW, w i til large Nimbi. 13. Fair, 

 with Cumulostratus. 14. In the evening a large, faint, lunar halo, on a kind of 

 Cirrose obscurity spread from N W towards the zenith. 15. Hoarfrost: fine sky, 

 with tendency to Cirrocumulus. 16. Hoar frost: Cirrocumulus by nine, a.m. in 

 extensive beds: a smart breeze came on, with Cirrostratus and fleecy Cumulus, and 

 th' first suaUow made its appearance about five, p.m.: rain ensued after dark, with 

 a fragrant smell froth the turf. 17. Drizzling morn: fine day. 18. Windy, over- 

 cast, bleak morning: fine day. 19. Cumulostratus, -windy. 20. Hoar fro t : fair, 

 with clouds; in the evening a westerly current was evident above, by the motion 

 of elevated Cirrostrati: two different beds of this cloud had appeared at sun-set, 

 crossing at an oblique angle in the S: the eclipse of the moon was welfseen at 

 intervats through these. 21. Little wind : fair. 88. Wet, p. m. 23. Very wet, 

 B. m. and again, with wind, at night. 2-1. Overcast day : net evening and night. 

 25. Some drizzling rain after inosculation of heavy Cumuli, with a stratum of 

 clouds above. 20. Fleecy Cumuli, with Cirri, and tendency to Nimbus in the S: 

 at nine a. m. an unusual agitation, evidently electrical, was produced in a Cirrus 

 by the passage beneath it of fleecy Cumuli, which came from S, with the vane at R; 

 thunder clouds soon after formed, and before one p.m. we heard three distinct 

 explosions; two distinct showers of rain mixed with hail followed, but without 

 ■wind : in the evening, large thunder clouds continuing about, it lightened for some 

 hours in the distance, nearly all the horizon round, the W only being free from 

 it: the wind SE. 27. Cloudy, wet morning: windy at SW: fine afterwards, 

 with large Cirrus above Cumulus: some lightning at night in the KE. 



RESULTS. 



Winds Variable, with much South East. 



Barometer: Greatest height 3037 inches; 



Least 2908 inches; 



Mean of the period , 29642 inches. 



Thermometer : Greatest height 68° 



Least 22° 



Mean of the period 45*36° 



Mean of the hygrometer 61° 



Evaporation 1*40 inches. 



Rain 309 inches. 



The excessive rains continuing, have occasioned repeated overflowings of the 

 river Lea into the marshes. Vegetation, which continued nearly dormant at the 

 commencement of this period, was making considerable progress towards the close 

 of it. 



Tottenham, Fifth Month, 4, 1818. L. HOWARD. 



