Meteorological Observations. ~ 159 
in this fluid some time, the external investment bursts, and allows the 
protrusion of globular masses of sarcous matter, as in Leucophrys, but 
not to such a great extent.— Proceedings of the Academy of Natural 
Sciences of Philadelphia, vol. iv. p. 233. 
METEOROLOGICAL OBSERVATIONS FOR DEC. 1849. 
Chiswick.— December 1. Very fine. 2. Heavy rain throughout. 3. Rain. 
4. Hazy clouds: fine: frosty. 5. Rain with fog: overcast at night: slight frost. 
6. Clear sky and low ground-fog: exceedingly fine. 7. Overcast. 8. Rain: 
cloudless, and very fine. 9. Frosty and foggy: fine: dense fog. 10. Foggy: 
uniform haze: overcast. 11. Overcast. 12. Foggy: cloudy and cold. 13. 
Slight drizzle: hazy. 14. Rain: drizzly. 15. Rain: clear atnight. 16. Cloudy: 
very fine: drizzly. 17. Boisterous: fine: clear. 18. Densely overcast: rain. 
19. Cloudy: fine: clear. 20. Clear and fine. 21. Slight snow-showers. 22. 
Frosty: densely clouded. 23. Clear and frosty: cloudless: clear and frosty. 
24. Hazy: slight snow: cloudy at night. 25. Clear and fine. 26. Drizzly: 
densely overcast. 27. Clear. 28. Drifting snow: clear and frosty throughout : 
severe frost at night. 29. Clandy: clear. 20. Clear. 31. Cloudy : fine: overcast. 
Mean temperature of the Month  .........sssseeeseeeevenees Poo eit’ 
Mean temperature of Dec. 1848 ............cescescecscecesces 41°75 
Mean temperature of Dec. for the last twenty-three years 59 °85 
Average amount of rain in December ...........-.0s0eeeeee0e 1°58 inch. 
Boston.— Dee. 1. Fine. 2. Rain: rain a.m. andr.m. 93. Rain: rain a.m. 
4, Fine. 5. Cloudy: raina.m. andr.m. 6. Fine. 7. Cloudy. 8. Rain: 
rain a.M. 9. Fine. 10. Cloudy. 11. Rain: rain a.m.and p.m. 12. Fine. 
13, 14. Cloudy. 15. Cloudy: rain a.m. and p.m. 16. Fine. 17. Cloudy: rain 
early a.m. 18. Cloudy: rain a.m. and p.m. 19. Fine: rain a.m. and stormy. 
20. Fine. 21. Cloudy: rain a.m. 22, Cloudy. 23. Fine. 24. Cloudy: 
rain a.m. 25. Cloudy. 26. Fine. 27, 28. Fine: stormy. 29. Fine: 
snow a.m. 30. Fine. 31. Cloudy. 
Applegarth Manse, Dumfries-shire.—Dec. 1. Frost a.m.: fog: wet pM. 2. 
Storm of wind and rain. 3. Blowing hard: wet: calmr.m. 4. Fine clear frosty 
day. 5. Snow a.m.: wet e.m. 6. Rain and wind. 7. High wind: rain p.m. 
8. Rain, but not heavy. 9. Fog and lightrain. 10. Fogallday. 11. Fair and 
frosty. 12. Clearand cold. 13. Dull and cold: sleet p.m. 14. Fine a.m.: 
cloudy and stormy p.m. 15. Foggy, with showers. 16. Fine a.m.: dull and 
damp p.m. 17. Fine, with slight showers. 18. Wet all day. 19, 20. Slight 
frost: fine. 21. Slight frost: fine: cloudy. 22. Slight frost: clear and fine. 23. 
Hard frost: cloudy p.m. 24. Change: soft: slight shower. 25. Frost again: 
mild v.m. 26. Slight frost: shower p.m. 27. Frost: clear: high wind P.M. 
28, 29. Very hard frost: sprinkling of snow. 30. Frost: clear and fine. 31. 
Frost very hard : thermometer 18°. 
Mean temperature of the Month  .......esseececeesseeceneeeees Seeks aE 
Mean-temperature Of Deci-1848 (3. 5. ccc-cccve+seoseacsceocssadss 39 °8 
Mean temperature of Dec. for the last twenty-five years ... 38 °1 
AVLen ner ainiitls PICEEMADCTIS Tentnscces ke sccw ee aiisclcdtaslicbe's cos sense 1:40 inch. 
Ditto average for twenty years in December .............0000+ 2°94 inches. 
Sandwick Manse, Orkney.—Dec. 1. Fine: cloudy. 2,3. Showers. 4. Snow- 
showers. 5. Showers. 6. Cloudy: clear. 7. Cloudy: drizzle. 8. Showers: 
drizzle. 9. Cloudy: showers: rain. 10. Drizzle: clear: aurora, 11, 12. Cloudy: 
clear: aurora. 13. Cloudy. 14. Rain: cloudy. 15. Cloudy: showers. 16. 
Rain : showers: clear. 17. Cloudy: showers... 18, Showers: damp: showers. 
19. Bright: showers: sleet. 20. Fine: frost: fine. 21. Fine: frost: aurora. 
22. Clear: frost: hazy. 23. Rain: cloudy. 24. Fine: damp. 25, 26. Showers, 
27. Hail-showers. 28. Snow-drift: thunder: snow-drift. 29. Cloudy: clear. 
30. Showers: cloudy. 31. Clear: cloudy. 
