Meteorological Observations. 545 



termined its mineralogical characters. Its density is 2S14 ; its 

 hardness between that of carbonate of lime and fluor-spar. Its com- 

 position, taking the mean of three ex2)eriments, was found to be — 



Silica 44-66 



Alumina .36.51 



Protoxide of iron 1 ■ 7 5 



Magnesia r40 



Potash 9-90 



Soda 0-92 



Water and carbonic acid .... 4"49 



99-63 

 Journ. de Ph. et de Ch., Mars 1848. 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1848. 

 CInswick. — April 1. Foggy : very fine : clear. 2. I'oggy in the morning: very 

 fine. 3, 4. Slight fog : fine. 5. Fine. 6. Overcast : very fine. 7. Cloudy : 

 rain at night. 8,9. Rain. 10. Fine: rain at night. II. Cloudy: rain. 

 12. Showery. 13. Overcast: heavy rain at night. 14. Clear and cold. 15. 

 Foggy : rain. 16. Hazy and damp : cloudy : rain. 17. Showery. 18. Rain. 

 19. Cloudy: fine. 20. Fine: rain. 21. Drizzly : overcast : rain at night. 22. 

 Rain : drizzly : partially overcast. 23. Fine : cloudy : slight rain. 24. Overcast : 

 drizzly. 25. Densely clouded. 26. Fine. 27. Clear : shower : clear. 28. Cold 

 rain: overcast : clear. 29. Overcast : fine. 30. Fine throughout. 



Mean temperature of the month 47°-33 



Mean temperature of April 1847 44-28 



Mean temperature of April for the last twenty years 47 '06 



Average amount of rain in April l-47inch. 



Jimton. — April 1. Foggy. 2. Fine : thunder and lightning p.m. 3,4. Fine. 

 5. Cloudy : rain P.M. 6. Fine : rain early a.m. 7. Fine. S. Rain : rain am. 

 and P.M. 9. Cloudy : rain A.M. 10. Cloudy : rain p.m. 11. Fine. 12. Cloudy: 

 rain A M. and p.. M. 13. Rain : rain a.m. 14. Fine. 15. Cloudy. 16. Cloudy: 

 rain P.M. 17. Cloudy : rain early am. 18. Cloudy: rain p.m. 19,20. Fine: 

 rain p.m. 21. Cloudy. 22. Cloudy: rain early a.m. 23. Cloudy: brisk 

 wind: rain p.m. 24. Rain: rain a.m. 25. Rain; rain early am.: rain p.m. 

 26. Cloudy : hail and rain A.M. 27. Fine. 28. Cloudy. 29,30. Fine. 



Applegarlh Mnnse, Dumfriesshire. — April 1. Fine spring day. 2. Fine spring 

 day : one slight shower. 3. Fine spring day : rain p^r. 4. Fair, but cloudy. 5. 

 Fair A.M. : rain p.m. 6. Fair a.m. : rain : hail. 7. Rain : frost a.m. 8. Showers : 

 snow preceding night. 9. l-'air : cloudy p.m. 10,11. Frost a.m. 12. Cloudy: 

 cleared. 13. Frost a.m. 14. Frost : one shower. 15. Frost : very cold. 16. 

 Cloudy and threatening. 17. Rain early a. jr. 18. Slight rain early. 19. Fair 

 and fine : thunder. 20. Fine : showers. 21. Rain early a.m. 22. Slight shower : 

 rain p.m. 23. Fair and droughty. 24. Fair: rain p.m. 25. Showery. 26. 

 Slight hail. 27. Frost, keen: rain p.m. 28. Hail : frequent showers. 29. Hail ; 

 frost. 30. Hard frost. 



Mean temperature of the month 43°*2 



Mean temperature of April 1847 43-4 



Mean temperature of April for twenty-five years 44 -2 



Mean rain in April for twenty years 1'76 inch. 



Sandwich- Manse, Orkney. — April 1. Bright : cloudy. 2. Bright : drops. 3. 

 Damp: drops. 4. Bright : showers. 5. Showers : aurora. 6. Sleet-showers: 

 showers: sleet. 7. Clear: frost: aurora. 8. Clear: frost: snow -showers. 

 9. Snow-showers: clear: frost. 10 — 13. Clear. 14. Cloudy. 15. Bright: 

 cloudy. 16. Bright : cloudy : drops. 17, 18. Damp. 19. Cloudy. 20. Damp. 

 21. Cloudy. 22. Clear ; cloudy. 23,24. Damp. 25. Cloudy ; drops. 26. 

 Snow-showirs : clear. 27. Bright : cloudy. 28, Hail-showers. 29. Sleet- 

 bhowers : hail-showers : aurora. 3(). Bright ; hail-showers : aurora. 



Phil. Mag. S. 3. No. 218. Suj)])l. Vol. '62. 1 N 



