Meteorological Observations. 79 



I have nothing to add to my former remarks, except that Chem- 

 nitzia conspicua, which Mr. Clark considers to be a variety of C. in- 

 sculpta or acuta, is clearly not so, as neither of the two latter species 

 possess the very conspicuous internal transverse ribs or folds upon the 

 outer lip, so apparent in the former ; which if it be not distinct, is un- 

 doubtedly a variety of Chemnitzia conoidea, the only British recent 

 species, I believe, that has that very peculiar character. 

 I am, Gentlemen, yours very obediently, 



George Barlee. 



METEOROLOGICAL OBSERVATIONS FOR MAY 1851. 



Chiswick. — May 1. Very fine. 2. Clear : fine : slight frost at night. 3. Fine : 

 rain at noon : cloudy. 4. Cloudy and fine : frosty at night. 5. Cloudy and 

 cold. 6. Slight rain : cloudy and cold. 7. Fine, but cold. 8. Fine. 9. Fine : 

 clear. 10, 11. Very fine. 12. Cloudy and fine. 13. Fine : clear. 14. Cloudy : 

 clear and frosty. 15. Very clear : fine : frosty at night. 16. Very fine: densely 

 clouded : rain. 17. Densely clouded. 18. Overcast : clear. 19. Cloudy : fine : 

 clear. 20. Clear and cold : fine. 21. Overcast. 22. Cloudy and warm. 23. 

 Hazy : fine : clear. 24. Very fine. 25. Cloudy : rain. 26 — 28. Fine. 29 — 

 31. Very fine. 



Mean temperature of the month 51°*16 



Mean temperature of May 1850 51 '14 



Mean temperature of May for the last twenty-five years . 54 *13 

 Average amount of rain in May 1-89 inch. 



Boston. — May 1. Fine. 2. Cloudy : rain p.m. 3. Cloudy: rain a.m. and p.m. 

 4. Cloudy : rain and hail a.m. and p.m. 5. Cloudy : rain a.m. and p.m. 6. Cloudy : 

 rain a.m. 7,8. Cloudy. 9. Fine. 10. Cloudy. 11. Cloudy : rain a.m. 12 r 



13. Cloudy. 14 — 16. Fine. 17. Cloudy. 18. Cloudy: rain p.m. 19. Cloudy: 

 rain a.m. 20—22. Cloudy. 23, 24. Fine. 25. Cloudy. 26. Cloudy : rain and 

 hail a.m. 27 — 31. Fine. 



Applegarth Manse, Dumfries-shire. — May 1. Frost keen : hail-shower: rain- 

 shower. 2. No frost, but cold : fair all day. 3. Cold : hail-showers : wind keen. 

 4. Frost : hail : rain p.m. 5. Cold : dull : quiet. 6. Milder. 7. Mild and slight 

 showers. 8. Dull and cloudy : rain p.m. 9. Heavy showers. 10. Dry and 

 parching. 11. Wind high, but fair. 12. Fine: cloudy p.m. 13. Fine day. 



14. Very fine all day. 15. Fine : cloudy p.m. 16. Dull : slight showers. 17. 

 Fine : dull p.m. 18. Wet morning: cleared and fine. 19. Hail-showers fre- 

 quent. 20. Dull and showery. 21. Dull, but fair. 22. Cloudy : cold wind. 

 23. Fine clear day and fair. 24, 25. Fine a.m. : slight shower p.m. 26. Fair 

 and clear. 27. Fair, but chilly. 28. Fair and fine : wind strong. 29. Fair and 

 fine: wind keen. 30. Fair and fine : very droughty. 31. Fair and fine : very 

 warm. 



Mean temperature of the month ,, 48°*9 



Mean temperature of May 1850 49 "1 



Mean temperature of May for the last twenty-nine years ... 50 *9 

 Average rain in May for twenty-four years l'89inch. 



Sandwick Manse, Orkney. — May 1. Damp: cloudy. 2. Damp: drizzle: showers. 

 3, 4. Snow-showers. 5. Bright : drops. 6. Damp : drops. 7. Clear : fine : 

 clear. 8. Bright : cloudy : aurora. 9. Bright: clear. 10. Bright : fine. 11,. 

 12. Cloudy : clear. 13. Fine : hazy. 14. Bright : hazy. 15. Clear : rain. 16. 

 Fine: clear. 17. Cloudy. 18. Bright: clear. 19. Cloudy: showers. 20. 

 Bright : drizzle. 21. Hazy. 22. Drizzle : showers. 23. Showers. 24. Fine : 

 rain. 25. Showers : clear. 26. Bright : fine. 27. Damp : showers. 28. Hazy j 

 drizzle. 29. Hazy : damp. 30. Showers : hazy. 31. Hazy. 



