Meteorological Society. 79 



water it falls to the bottom in drops of an oily appearance, and is con- 

 verted into chromic and hydrochloric acids. Its boiling point is 244° 

 Fahr., and its specific gravity is 1*71 ; it acts rapidly on mercury ; it 

 is decomposed by sulphur, detonates with phosphorus, dissolves chlo- 

 rine and iodine, and combines with ammonia with the disengagement 

 of light. A small quantity mixed with concentrated alcohol com- 

 bines with it with violent explosion, and the inflamed alcohol is pro- 

 jected with force. This unexpected action had nearly deprived M. 

 Walter of his eyesight, and burnt him horribly. 



The analysis of this substance by M. Walter agrees with that of 

 M. Rose, namely. 



Oxygen 19-28 



Chlorine 45*14 



Chromium 35-58 100' 



Ann. de Chimie. et de Physique, 66-391. 

 It appears to me that it would be more simple to consider this 

 compound as an oxichloride of chromium, than a bichromate of per- 

 chloride of chromium. . It might then be regarded as composed of 

 Two equivs. of Oxygen. ... 16 or 20 

 One equiv. of Chlorine . . 36 — 45 

 One equiv. of Chromium. .28 — 35 



80 100 

 R. P. 



METEOROLOGICAL OBSERVATIONS FOR MAY 1838. 



Chisunck. — May 1. Fine: rain: fine at night. 2,3, Very fine. 4. Dry 



haze. 5. Thunder : fine. 6. Slight haze : very fine. 7, 8. Very fine. 



9. Hot and very dry. 10. Cold and dry. 11,12. Fine. 13. Hazy: fine. 



14. Cloudy and cold. 15 — 18. Fine. 19. Overcast. 20. Slight rain. 



21. Cloudy. 22,23. Cloudy: rain. 24. Overcast. 25 — 27. Fine. 

 28. Rain. 29,30. Fine. 3J. Very fine: heavy thunder-showers at night. 



Boston. — May 1. Cloudy: heavy rain p.m. 2. Cloudy. 3. Cloudy: 

 thunder, lightning, and rain early a.m. 4,5. Fine. 6. Cloudy. 7 — 12. 

 Fine. 13. Cloudy : rain early a.m. : rain p.m. 14. Cloudy: rain early a.m. 

 15 — 17. Fine. 18— -19. Cloudy. 20. Cloudy : rain p.m. 21. Cloudy. 



22. Cloudy : rain a.m. 23. Rain. 24, 25. Cloudy. 26, 27. Fine. 28. 

 Fine: rain p.m. 29. Cloudy. 30. Cloudy: rain p.m. 31. Cloudy. 



Applegarth Matise, Duvifries-shire. — May 1. Sun shone : hoar frost a.m. : 

 cold P.M. 2. Sun shone : genial rain afternoon. 3. Sun shone, showery 

 a.m. 4. Sun shone : moist and mild : genial. 5. Sun shone : a beautiful 

 day. 6. Sun shone : very dry and parching. 7. Sun shone : warm and 

 genial. 8. Sun shone : very warm and clear. 9. Sun shone : the 



same. 10. Easterly wind : cool. 11. Sun shone: milder than preceding 

 day. 12. Sun shone : a few drops of rain p.m. 13. Sun shone: 

 withering day. 14. Sun shone: cold, with hail showers. 15. Sun shone: 

 clear and cold. 16. Sun shone : heavy hail showers, 17. Sun shone: 

 cold and showery. 18. Sun shone: cold and withering. 19. Cold and 

 very wet. 20. Heavy rain all day. 21. Sun shone : showery and mild. 

 22, Mild and very wet. 23. Sun shone : moist: rather cold. 24. Sun 

 shone : clear growing day. 25. Sun shone : mild and clear. 26. Sun 

 shone : clear and warm. 27. Dull and withering. 28. Sun shone : clear 

 and warmish. 29. Soft air : wet all day. 30. Sun shone : warm and 

 growing. 31. Sun shone : mild with showers. 



