Meteorological Observations. 159 



water, of 150 for sether. This phenomenon is very general, as is 

 proved by the variety of the liquids on which I have operated. It 

 probably accompanies all supersaturations, but at variable degrees 

 and in various directions, without being capable of being proved. 



Following the advice of M. Regnault, I endeavoured to separate 

 the two facts, and to produce the dilatation of the liquids in vacuo. A 

 peculiar apparatus enabled me to fill the tubes with liquids absolutely 

 freed from air, and to close them without letting any gas enter. 

 Under these new conditions, I reproduced the phenomenon of forced 

 dilatation with water and aether, and have thus seen that it is inde- 

 pendent of supersaturation, This permanence of the density of the 

 liquids in an interval of temperature more or less considerable, ap- 

 pears to me attributable to the adhesion of the glass and the liquid : 

 it is a force which is opposed to the division of this latter, and which 

 can only be destroyed by an increase of the molecular attraction of 

 the liquid for itself, an increase produced under the influence of cool- 

 ing. — Comptes Rendus, June 24, 1850. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1850. 



Chiswick. — June 1, 2. Very fine. 3, 4. Fine, but air excessively dry. 5. Slight 

 haze: sultry. 6. Overcast : rain. 7. Cloudy and boisterous : showery. 8. Dull 

 and cloudy : fine. 9 — 11. Very fine. 12. Fine: cloudy. 13. Cloudy: clear 

 14. Uniformly overcast: rain: showery. 15. Rain: clear at night: frost jf 

 16. Clear : cloudy and fine. 17. Very fine. 18. Cloudless : very dry air : large 

 distinct halo round the sun at noon. 19 — 22. Very fine. 23. Hot : quite cloud- 

 less. 24, 25. Hot, with slight dry haze. 26. Hazy : hot and sultry : heavy rain 

 at night. 27. Rain : fine. 28. Hazy: rain. 29. Cloudy : very fine : clear and 

 cold. 30. Fine : cloudy. 



Mean temperature of the month 59 0, 26 



Mean temperature of June 1849 * 59 'SO 



Mean temperature of June for the last twenty-three years ... 60 -88 



Average amount of rain in June 1*88 inch. 



Boston. — June 1. Cloudy. 2 — 5. Fine. 6,7. Cloudy: rain p.m. 8,9. 

 Cloudy. 10, 11. Fine. 12, 13. Cloudy. 14. Cloudy : rain a.m. and p.m. 15, 

 16. Cloudy. 17. Cloudy : rain, with thunder and lightning a.m. 18,19. Fine. 



20. Cloudy. 21. Fine. 22. Cloudy. 23. Fine. 24. Fine: thermometer 88° 

 2 o'clock p.m. 25 — 27. Fine. 28. Fine : rain a.m. and p.m. 29,30. Cloudy. 



Applegarth Manse, Dumfries -shire. — June 1. Fine : fair : very warm. 2. Fine : 

 very warm. 3. Fine : getting cloudy. 4. Fine : still cloudy. 5. Shower a.m. : 

 thunder. 6. Shower a.m. : heavy rain p.m. and thunder. 7. Showery a.m. : 

 fair p.m. 8. Showery all day. 9. Fair, but getting cloudy. 10. Slight shower 

 early ; fair p.m. 1 1. Slight shower early : fine day. 12. Rain and wind all day. 

 13. Rain during the night: fair all day. 14. Rain nearly all day, 15. Fair all 

 day and fine. 16. Fair and fine: cloudy p.m. 17. Rain early: fine day. 

 18. Fine all day. 19. Cloudy, but fine. 20. Fair and fine : getting moist p.m. 



21. Showery. 22. Cloudy: rain during night. 23 — 25. Very fine all day. 

 26. Very fine : fresh and invigorating. 27. Parching east wind. 28. The air 

 highly electric. 29. The air highly electric : a few drops. 30. Rain p.m. : con- 

 tinued all night. 



Mean temperature of the month 57°'6 



Mean temperature of June 1849 53*3 



Mean temperature of June for twenty-eight years 55 *9 



Rain in June for twenty years 3'16 inches. 



Sandwich Manse, Orkney. — June 1. Fine, 2, 3. Fine : warm. 4. Fine. 5. 

 Rain: fog. 6. Damp: cloudy. 7. Drops: showers. 8. Drops. 9. Drops: 

 rain. 10. Fine : rain. 1 1 . Showers : clear. 12. Rain : showers. 13. Drizzle: 

 showers: drizzle. 14. Bright: drops. 15. Bright: clear. 16. Fine: clear: 

 fine. 17. Fine. 18. Fine : cloudy. 19. Cloudy. 20. Showers : cloudy. 21. 

 Rain : thunder : showers. 22. Bright : rain. 23. Cloudy. 24. Bright : clear. 

 25,26. Cloudy. 27. Bright: cloudy. 28. Bright: clear. 29,30. Bright: 

 drops. 



