Meteorological Observations. 79 



NEW MINERALS — MEDJIDITE AND LIEBIGITE. 



M. Laurence Smith has announced to the Academy of Sciences 

 the discovery of two new minerals. The first, to which he has given 

 the name Medjidite, is a double sulphate of lime and uranium, U 2 3 

 SO 3 -f-CaO SO 3 , HO ; the other, which he calls Liebigite, consists of 

 carbonate of lime and uranium, U 2 O 3 , C0 2 +CaO CO 2 +20 HO.— 

 Comptes Rendus, Fevrier 7, 1 848. 



METEOROLOGICAL OBSERVATIONS FOR MAY 1848. 



Chiswick. — May 1 . Fine : cloudless, with very dry air. 2. Dry haze. 3, 4. 

 Slight fog: fine: clear. 5 — 7. Very fine. 8. Excessively dry air. 9, 10. Very 

 fine. 11 — 13. Hot and very dry. 14. Fine. 15. Slight haze : cloudy and fine. 



16. Cloudless and very fine. 17. Very fine. 18. Fine: large white clouds: 

 thunder and hail-shower in afternoon: clear at night. 19. Cloudy: slight 

 showers. 20. Showery. 21. Fine : slight rain. 22. Very fine. 23. Cloudless. 

 24. Fine. 25. Clear : cloudy : clear. 26. Foggy : fine, with slight haze : clear. 

 27. Overcast. 28. Very fine : slight haze. 29. Very fine : hot and dry : par- 

 tially overcast at night. 30, 31. Fine. 



Mean temperature of the month 58°*12 



Mean temperature of May 1847 56 "83 



Mean temperature of May for the last twenty years 55 '91 



Average amount of rain in May 1*84 inch. 



Boston. — May 1 — 8. Fine. 9. Cloudy. 10. Fine. 11. Fine: two o'clock 

 thermometer 78°. 12. Fine. 13. Cloudy. 14. Fine. 15. Cloudy. 16. Fine. 



17. Fine: rain, thunder and lightning p.m. 18,19. Fine. 20. Cloudy. 21. 

 Fine. 22. Cloudy. 23—26. Fine. 27. Cloudy. 28, 29. Fine. 30. Cloudy. 

 31. Fine : rain p.m. 



Apjikgarth Manse, Dumfries-shire. — May 1 . Slight frost a.m. : fine. 2. Fine, 

 but cloudy. 3. Very fine. 4. Beautiful day. 5. Beautiful day : getting cloudy. 

 6. Beautiful day. 7. Slight rain p.m. 8. Heavy rain early. 9, 10. Fine 

 summer days. 11. Fine summer day : overcast. 12. Fine summer day : still 

 fair. 13. Fine summer day : fine : clear. 14. Fine summer day : slight shower : 

 thunder. 15. Cloudy: rain p.m. 16. Cloudy a.m. : clear p.m. 17. Clear and 

 fine. 18. Cloudy : cleared. 19. Wet a.m., but fine. 20. Cloudy a.m. : fine p.m. 

 21. Dull and drizzling : cleared. 22,23. Beautiful summer day. 24. Beau- 

 tiful summer day : distant thunder : shower. 25. Beautiful day. 26. Clear a.m. : 

 shower p.m. 27. Warm and fine. 28. Rain a.m. : showery all day. 29,30. 

 Fair and fine. 31. Htavy rain all day. 



Mean temperature of the month 52°*9 



Mean temperature of May 1847 51 *I 



Mean temperature of May for twenty-five years 51 '09 



Rain in May for twenty years 1"69 inch. 



Sandwick Manse, Orkney. — May]. Clear. 2. Fine. 3. Rain: fine. 4,5. 

 Fine. 6. Fine : cloudy. 7. Cloudy : showers. 8, 9. Clear. 10. Damp. 

 11. Fine: showers. 12. Bright : drizzle. 13. Drizzle : damp. 14. Clear : fine. 

 15. Cloudy: drizzle. 16. Rain: showers. 17. Clear: cloudy. 18. Fog: 

 showers. 19. Clear: cloudy. 20. Drops: fine. 21. Clear: cloudy. 22. 

 Cloudy. 23. Fog : damp. 24. Bright : damp. 25. Bright : cloudy. 26. 

 Cloudy. 27. Bright : rain. 28. Bright : cloudy. 29. Clear : drops. 30. Cloudy ; 

 clear. 31. Rain. 



