Meteorological Observations. 263 



string. The caoutchouc thus highly stretched becomes almost trans- 

 parent ; and when viewed by polarized light, it gives, when in this 

 constrained condition, a definite system of colours not unlike the 

 figures produced in a circular piece of tempered glass. — From Silli- 

 man's American Journal for January 1851. 



METEOKOLOGICAL OBSERVATIONS FOK JAN. 1851. 

 Chiswick. — January 1. Densely clouded : boisterous, with slight rain. 2. Over- 

 cast : cloudy : densely overcast. 3. Hazy : heavy rair : overcast. 4. Hazy : 

 clear. 5. Very fine. 6. Dense fog. 7. Foggy: cloudy and fine. 8,9. Very fine. 



10. Kain. 11. Fine : drizzly. 12. Densely overcast : drizzly. 13. Densely 

 clouded. 14,15. Fine: cloudy. 16. Very fine. 17. Fine : heavy rain at night. 

 IS. Clear: very fine. 19. Fine: cloudy: overcast. 20. Densely overcast 

 boisterous, with rain. 21. Overcast : very fine : heavy rain at 8 p.m. 22. Clear 

 very fine. 23. Frosty: fine: clear and frosty. 24. Dense fog. 25. Cloudy 

 overcast. 26. Fine : overcast : rain. 27. Clear : very fine. 28. Very fine : rain. 

 29. Overcast : boisterous, with rain at night. 30. Rain : fine : rain at night. 31. 

 Sleet: rain. 



Mean temperature of the month 40°'40 



Mean temperature of Jan. 1S50 33 "11 



Mean temperature of Jan. for the last twenty-five years . 36 -60 



Average amount of rain in Jan 1"60 inch, 



Boston. — Jan. 1. Cloudy: stormy p.m. 2. Cloudy: rain a.m. and p.m. 3. 

 Cloudy: rain P.M. 4. Cloudy. 5. Cloudy : rain early a.m. 6, 7. Foggy. 8. Fine : 

 rain P.M. 9. P'ine. 10. Rain: rain a. si. and p.m. U — 15. Cloudy. 16 — 19. 

 Fine. 20. Fine: rain p.m. 21,22. Fine. 23,24. Cloudy. 25. Cloudy: 

 rain p.m. 26. Fine. 27, 28. Fine : rain p.m. 29, 30. Cloudy : rain p.m. 

 31. Fine. 



Applegarlh Manse, Dumfries-shire. — Jan. 1. Boisterous day of darkness, 

 wind and rain. 2. Fearful night of wind and rain : calm a.m. 3. Frost hard : 

 thick fog all day. 4. Thaw : rain ; high wind p.m. 5. Wet all day. 6. Frost 

 preceding night : moist. 7. Frost : thaw : rain p.m. 8. Snow-shower : rain again. 

 9. Frost; clear: fine. 10. Rain: fog: continued drizzle. U. Rain all day. 

 12. Rain heavy during night: day fine. 13. Drizzle all day : wind high. 14. 

 Rain heavy: drizzle : flood. 15. Rain a.m. : rain again p.m. 16. Rain and high 

 wind. 17. Fair A.M. : rain and wind P.M. 18. Frost slight a.m. : fine day. 19. 

 Showers: dull and cloudy. 20. Rain heavy all day : flood. 21. Rain during 

 night: fine a.m. 22. F'rost slight : occasional showers. 23. Fair and mild all 

 day. 24. Fair a.m. : rain again p.m. 25. Rain heavy night and morning. 26. 

 Rain duriiig night : fair noon : wet P.M. 27. Fair: calm: high wind p.m. 28. 

 Fair A.M. : rain and wi_nd p.m. 29. Rain nearly all day : flood. 30. Fair a.m. : 

 heavy snow p.m. 31. Frost: fog : snow lying : calm. 



Mean temperature of the month 40°"4 



Mean temperature of Jan. 1850 30 '8 



Mean temperature of Jan. for the last twenty-nine years ... 34 "7 



Average rain in Jan. for twenty-four years 2-60 inches. 



Sandwick Manse, Orkney. — Jan. 1. Showers. 2. Showers : sleet : showers. 3. 

 Showers : clear. 4. Frost : cloudy. 5. Showers : clear. 6. Fine : clear : showers. 

 7. Fine : frost : cloudy. 8. Bright : showers. 9. Showers : large halo. 10. Rain. 



11. Cloudy. 12. Rain: clear. 13. Rain ; cloudy : clear. 14. Cloudy : rain : 

 cloudy. 15. Cloudy : drizzle. 16. Clear : rain. 17. Clear: large lialo. 18. 

 Clear : sloet-showers. 19. Cloudy : clear : aurora. 20. Cloudy : showers. 21. 

 Bright: cloudy: showers. 22. Sleet-showers: showers: aurora. 23. Bright: 

 cloudy : aurora. 24. Rain : cloudy. 25. Kain : cloudy. 26. Rain : clear : 

 cloudy. 27 — 29. Rain : clear : aurora. 30. Showers: clear: hoar-frost. 31, 

 Clear : frost : bleet-shuwers. 



