Meteorological Observations, 159 



acid completely. Moreover, these precipitates diflFer in no respects 

 from tannic acid, which has been acidulated with a mineral acid. 

 The formation of a precipitate by a mineral acid in a solution of 

 tannin is therefore perfectly conformable to the precipitation of the 

 same solution by chloride of sodium and other alkaline salts, and 

 even by aether, and must be explained by a diminution of the solu- 

 bility of the tannin in consequence of the change in the solvent. 



Gallic acid, which, according to some chemists, contains in the 

 formula C'^H^O^o 4 or 2 equivs. of water, is, from my analyses, 

 a tribasic acid ; and the yellow lead salt, regarded by Liebig and 

 Biichner as a neutral salt, and represented by the formula 



4PbO.C«^H2 06, 

 is a basic salt, which, when dried at 248° F., has a composition re- 

 presented by the formula 



4PbO . C'4 H3 07, or 3PbO . C'^ W Q? + PbO. 

 In fact, five analyses performed with materials prepared at different 

 times gave 75*9 to 76*1 per cent PbO ; numbers which approach 

 much more closely to the latter formula than to that of Liebig and 

 Biichner. — Comptes Rendus, July 3, 1854, p. 49. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1854. 



Chiswick. — June 1. Fine : cloudy. 2. Rain. 3. Cloudy : clear. 4. Cloudy : 



clear and cold at night. 5. Uniformly overcast : fine. 6. Cloudy and cold. 



7, 8. Cloudy. 9. Overcast. 10. Fine. 11. Fine : overcast. 12. Densely clouded : 



slight shower : very clear at night. 13. Rain: clear. 14. Cloudy: very fine. 



15. Hazy and drizzly. 16. Hazy : rain. 17. Uniformly overcast : very fine : 

 clear. 18. Clear and very fine. 19. Very fine : cold at night. 20. Slight haze : 

 cloudy : fine : clear. 21. Fine : cloudy : rain. 22. Very fine. 23. Uniformly 

 overcast : very fine : clear. 24,25. Cloudy and fine. 26. Fine. 27. Fine: rain 

 at night. 28. Showery : very clear. 29. Cloudy : clear. 30. Very fine : rain at 

 night. 



Mean temperature of the month 56°*93 



Mean temperature of June 1853 59 '16 



Mean temperature of June for the last twenty-eight years . 60 -51 



Average amount of rain in June 1*90 inch. 



Boston. — June 1. Cloudy. 2. Rain a.m. 3 — 11. Cloudy. 12. Cloudy: rain 

 A.M. 13—15. Cloudy. 16. Cloudy : rain p.m. 17, 18. Cloudy. 19—22. Fine. 

 23. Fine : thermometer 83° half-past 2 p.m. 24. Fine : thermometer 80° half- 

 past 2 P.M. 25. Fine: thermometer 87°: rain p.m. 26. Cloudy: rain a.m. 

 27. Cloudy. 28. Cloudy : rain a.m. and p.m. 29. Cloudy. 30. Cloudy : rain p.m. 

 Sandwick Manse, Orkney. — June 1. Drizzle a.m. and p.m. 2. Cloudy a.m. 

 and p.m. 3. Bright a.m. : cloudy p.m. 4. Cloudy a.m. and p.m. 5. Damp a.m. 

 and p.m. 6. Cloudy a.m. and p.m. 7. Cloudy a.m. : drizzle p.m. 8. Damp a.m. : 

 cloudy, fine p.m. 9. Drops a.m. : small rain p.m. 10. Cloudy a.m. : drops p.m. 

 11. Clear a.m.: rain p.m. 12. Clear a.m.: clear, fine p.m. 13. Clear a.m.: 

 drops P.M. 14. Cloudy a.m. : showers, cloudy p.m. 15. Cloudy a.m. : clear p.m. 



16. Bright A.M. : cloudy P.M. 17. Clear a.m. : cloudy p.m. 18. Damp a.m. : 

 cloudy p.m. 19. Rain a.m. : fog p.m. 20. Clear a.m. and p.m. 21. Clear, fine 

 a.m. and p.m. 22. Bright a.m. : cloudy p.m. 23. Drizzle a.m. : cloudy, fine 

 p.m. 24. Rain a.m. : clear, fine pm. 25. Clear, fine a.m. : cloudy, fine p.m. 

 26. Showers a.m. : damp p.m. 27. Showers a.m. : cloudy p.m. 28. Clear, fine 

 a.m. : cloudy P.M. 29. Clear, fine a.m. : drizzle p.m. 30. Drizzle a.m. : drizzle, 

 showers p.m. 



Mean temperature of June for twenty-seven previous years . 52°'81 



Mean temperature of June 1853 55 '21 



Mean temperature of this month 52*86 



Average quantity of rain in June for thirteen previous years . 2-24 inches. 



