Obituary — Meteorological Observations. 327 



oxidation is complete, and add to the boiling liquor, when it is near 

 its crystallizing point, a few drops of solution of potash ; the green 

 substance is then decomposed, and flocks of peroxide of iron sepa- 

 rate. It is very easy to observe the moment at which the object is 

 attained, and care must be taken not to add too much potash, be- 

 cause an excess of it would convert the ferridcyanide of potassium 

 into ferrocyanide. The solution is to be filtered hot to separate the 

 peroxide of iron ; it possesses a deep purplish red colour, is to be 

 cooled very slowly, and then fine crystals of the salt are obtained. 



— Ibid. 



OBITUARY. 

 We record with much regret the decease of our highly distin- 

 guished correspondent Mr. Ivory, Fellow of the Royal Society, and 

 Member of the Institute of France, who died at Hampstead on the 

 2 1st of September, aged 77 : — Also the death of our much respected 

 and venerable friend Mr. Peter Ewart (an occasional contributor to 

 our Journal), occasioned by an accident in the proving of a chain 

 cable, to which he was attending in the discharge of his duties at 

 "Woolwich. 



METEOROLOGICAL OBSERVATIONS FOR AUGUST 1842. 



Chiswick. — August!. Overcast: very fine. 2. Sultry. S. Sultry: distant 

 thunder. 4. Sultry : high temperature maintained day and night. 5. Cloudy 

 and fine. 6. Cloudy : rain. 7 — 9. Clear, hot and dry. 10. Sultry : excessively 

 hot and dry : heavy thunder-storm at night, with rain in torrents. 11. Cloudy: 

 clear and fine. 12. Clear and fine throughout. 13. Overcast: clear and fine. 

 14. Sultry. 15. Cloudless and hot. 16. Hot and dry. 1 7. Dry easterly haze : 

 very hot. 18. Excessively hot and sultry : lightning in the evening. 19,20. 

 Cloudy: fine. 21. Very fine. 22. Hot and dry, with easterly wind : lightning. 

 23. Cloudless, hot and dry. 24. Hot and dry : lightning, distant thunder, with 

 wind and rain at night. '25. Overcast : heavy thunder-showers in the evening. 

 26. Hazy : sultry. 27. Cloudy and fine. 28. Rain : cloudy and fine. 29. 

 Heavy thunder-showers early a.m. : violent thunder-storm commenced four p.m., 

 with very heavy rain: clear at night. 30. Hazy. 31. Clear and fine. — Mean 

 temperature of the month 4° above the average. 



Boston. — Aug. 1 — 3. Cloudy. 4. Fine. 5. Cloudy. 6. Rain. 7 — 9. Fine. 



10. Fine : rain, with thunder and lightning p.m. : thermometer 85° three o'clock. 



11. Fine. 12. Cloudy. 13. Cloudy: thermometer 79° two o'clock p.m. 14. 

 Cloudy: thermometer 80° two o'clock p.m. 15. Fine: thermometer 80° eleven 

 o'clock a.m. 16. Foggy. 17. Cloudy. 18. Fine: thermometer 83° two o'clock 

 p.m. 19. Cloudy. 20. Fine. 21,22. Cloudy. 23. Fine: thermometer 82° 

 two o'clock p.m. 24. Cloudy: rain with thunder and lightning at night 25 — 

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



Sandwick Manse, Orkney. — An j. 1, 2. Clear. 3. Cloudy : damp. 4. Rain: 

 showers. 5. Showers. 6. Drops : clear. 7. Bright : showers. 8. Clear : rain. 

 9. Clear: cloudy. 10. Damp: thunder: rain. 11. Showers: rain. 12. Show- 

 ers : cloudy. 13. Bright : rain. 14. Drizzle : cloudy. 15. Drizzle : rain. 16. 

 Clear. 17,18. Clear : cloudy. 19. Fog : thunder. 20. Cloudy. 21. Showers: 

 clear. 22. Bright : clear. 23. Rain. 24. Clear. 25. Clear: cloudy. 26 — 28. 

 Clear. 29. Clear: cloudy. 30. Rain: clear. 31. Clear. 



Applegarlh Manse, Dumfries-shire. — Aug. 1 — 3. Very fine. 4. Showers. 

 5. Showery. 6. Fine. 7. Slight showers. 8. Rain p.m. 9. Showers. 10. 

 Heavy rain and thunder. 11. Fair and bracing. 12. Cloudy and drizzly. 

 13 Fair and fine. 14 — 16. Very fine. 17, 18. Very fine: very hot. 19. Show- 

 ers. 20. Heavy showers. 21,22. Fair and bracing. 23. Fine: one shower : 

 thunder. 24. Wet a.m. : cleared up. 25—27. Fair and fine. 28. Fair and 

 fine, but hazy. 29—31. Slight showers. 



