Meteorological Observations for January 1832. 239 



Clouds. 



Cirrus. Cirrocumulus. Cirrostratus. Stratus. Cumulus. Cuniulostr. Nimbus. 



6 1 31 1 4 7 lU 



Scale of the prevailing Winds. 



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



V 5§ 4 4i 5 3i 2* 4 31 



G.««-«Z 06.«-m^io,w.-This mouth has been generally mild and calm, 

 with a humid atmosphere ; but a few sharp frosts have occurred at intervals. 

 Thou^'h very little rain has fallen, yet the evaporation has been very slow. 

 On comparing the mean amount of evaporation for January with the 

 mean of July for a series of years, the quantity in the former month is net 

 the one-sixth part of that in the latter; the great difference arises from 

 the obliquity of the sun's rays, and the consequent absence of solar heat 

 in January,- circumstances which bring the vapour plane to its lowest point. 

 The difference of evaporation between December and June is nearly the 



'^The cround having been but slightly penetrated by frost this winter, only 

 a small^'number of insects will be destroyed : both the ground and winged 

 insects are beginning to make their appearance, the same as they ge- 

 nerally do a month later. . , • . ^ 



The mean temperature of the external air for this period is about one 

 de'-ree higher than the mean of January for many years past. 



The atmospheric phsenomena that have come within our observations 

 this month, are, one lunar halo, and four gales of wind namely, two 

 from the North-east, one from the East, and one from the feouth-west. 



REMARKS. 



London. - January 1-3. Frosty with fog. 4. Dense fog : clear at night. 

 5. Overcast. 6. Hazy. 7. Foggy : rain at night. S. Foggy. 9 Hazy 

 rain. 10. Rain. 11. Heavy rain : dear at night. 12. Fine : ram at night. 

 1-5 Showery. 14. Clear and frosty. 15. Foggy. 16. Slight fog: fine. 

 17, 18. Nights and mornings foggy: days fine. 19.Dense fog. 20,2l. toggy. 

 22. Overcast. 23. Rain : frosty at night. 24. Fine 25. Rain : clear. 

 26 Foggy. 27. Snow: rain: clear at night. 28. Fine. 29. Drizzly. 

 30 31 Overcast.— With very few exceptions, the atmosphere has been at 

 all' times completely saturated with moisture throughout the month. 



Penzanc^.-January 1. Clear : fair. 2. Fair. 3. Fair at times : clear. 

 4 Fair- clear. 5 Fair. 6.Rain:fair. 7. Fair: showers. 8. Fme through- 

 oot 9 Rain- fair. 10—12. Showers. 13. Showers: hail and rain. 

 t4_,6."ciear. 17. Clear : fair. 18— 21. Fair. 22. Showers. 23. Fair : 

 24. Fair: rain. 25. Showers. 26. Rain : fair: rain at night. 27. Showers : 

 hail and rain. 28. Fair. 29. Showers. 30, 31. Fair. 



2fr«<on. - January 1. Fine. 2, 3. Cloudy. 4. Fine. 5— 7. Cloudy. 

 8. Cloudy: rain early a.m. 9. Cloudy: rain early a.m. and rain at night. 

 10. Cloudy : rain at night. 11. Fine: ram p.m. 12. 1* inc. JS.Kain. 

 14. Fine: rain i-.M. 15. 16. Fine. 17. Foggy. 18. Fine. 19. Rime frost. 

 20, 21. Foggy. 22. Fine. 23. Cloudy. 24. Fine: ram early a.m. 

 25. Cloudy. 26. Fine. 27. Rain. 28. Fine. 29. Cloudy. .30. tine. 

 31. Cloudy. 



Metcoro- 



