Meteorological Observations, 335 



chlorine is disengaged, and there remains chloride of iodine, which 

 gives a precipitate of iodine with carbonate of potash. 



According to M. Mellon, the formation of chloride of iodine ex- 

 plains the reaction that occurs : the iodine attracts the chlorine of 

 the chlorate, whilst the greater affinity of the iodine for the oxygen, 

 and the greater cohesion of the iodate, cause the iodine to enter into 

 the chlorate instead of the chlorine. The action M. Mellon repre- 

 sents thus : 5 C I O 5 , K O + 61 = 5 I O 5 , K O + I C P. 



Journal de Pharmacie, torn, xxvii. p. 102. 



PROFESSORSHIP OF GEOLOGY, UNIVERSITY COLLEGE, LONDON. 



We have great pleasure in recording the establishment of a Chair 

 of Geology in University College, and that Thomas Webster, Esq., 

 formerly Secretary to the Geological Society, has been appointed to 

 occupy it. 



Professor Webster's Course on Geology at the College, consisting 

 of Thirty Lectures, will commence on the first Tuesday in February 

 1842, and will be divided into three parts. 



1. The description of such simple minerals as enter essentially 

 into the composition of rocks. 



2. Geology, properly so called ; or the characters and superposi- 

 tion of the strata composing the crust of the globe, together with 

 an account of the various phenomena exhibited by them. 



3. The application of the above subjects to the useful arts. 



METEOROLOGICAL OBSERVATIONS FOR AUG. 1841. 



Chiswick. — August 1. Slight rain : cloudy and fine. 2. Fine with clouds : rain. 

 3. Hazy: cloudy and mild : rain. 4. Cloudy and fine. 5. Fine: slight rain. 

 6, 7. Fine. 8. Rain : cloudy and fine. 9. Very fine. 10. Very fine : rain. 



11. Stormy and wet. 12. Fine. 13. Cloudy. 14. Rain: showery: clear at 

 night. 15—17. Cloudy and fine. 18. Hazy : fine. 19, 20. Very fine. 21. 

 Cloudy. 22. Cloudy : slight rain. 23. Rain : cloudy and fine. 24. Showery : 

 clear. 25. Drizzly. 26. Hazy and mild. 27. Heavy dew : cloudy and hot. 

 28 — 30. Foggy in the mornings : very fine : evenings clear. 31. Overcast and 

 fine. 



Boston. — August 1 . Fine : rain p.m. 2. Fine. 3. Cloudy : rain p.m. 4. Fine: 

 rain early a.m. 5. Cloudy : rain p.m. 6. Cloudy and stormy. 7. Cloudy : rain 

 p.m. 8,9. Cloudy. 10. Fine. 11. Cloudy: rain early a.m. : rain p.m. 12. 

 Stormy. 13. Cloudy. 14. Cloudy: rain early a.m. 15, 16. Cloudy. 17. 

 Fine: rain p.m. 18, 19. Fine. 20. Fine: thermometer 77° half-past two p.m. 

 21. Fine: rain a.m. 22. Fine. 23, 24. Fine: rain early a.m. 25. Rain: 

 rain early a.m. 26. Cloudy : thermometer 75° three-quarters past two p.m. 27. 

 Fine : thermometer 75° quarter -past eleven a.m. 28, 29. Fine. 30, 31. Cloudy. 



Applegarth Manse, Dumfries-shire. — August 1. Fair, but cool and cloudy. 

 2. Fair and fine. 3. Wet a.m. : cleared and was fine. 4. Fair and fine. 5. 

 Rain all day. 6. Wet a.m. : cleared and was fine. 7. Wet, slightly. 8. Fine 

 though showery: thunder. 9. Wet a.m.: became fine. 10. Showery. 11. Fair. 



12. Showery all day. 13. Partial showers. 14. Wet a.m. : became fine. 15. 

 Fine till p.m.: then rain. 16. Wet a.m. : cleared p.m. 17. Fair throughout. 

 18. Fair a.m. : wet p.m. 19. Fair and warm: air electrical. 20. Wet nearly 

 all day : thunder. 21. Wet p.m. : flood. 22. Fine and fair. 23. Occasional 

 slight showers. 24. Wet p.m. and evening : thunder. 25. Showery. 26. Rain 

 early a.m. : cleared. 27. Fine: one shower a.m. 28. Wet morning: cleared, 

 29. Fine but cloudy. 3a Wet all day. 31. Fair and fine. 



