Meteorological Observations, 487 



That of the latter, those which occur in running water are richer 

 in iodine than those of stagnant water ; 



That in sheets of water, which are sufficiently large to be strongly- 

 agitated by winds, the plants approach those of running water, in 

 the quantity of iodine which they contain ; 



That the proportion of iodine contained in plants is in general 

 independent of their nature, and subordinate only to their habitat, 

 as indicated by the Confervae, the Potamogetons, the Nymphsea, the 

 Ranunculi, and the Cresses, all of which are equally rich in iodine 

 in running waters, and equally poor in marshes ; 



That the iodine exists uncombined with the tissue, but in the state 

 of alkaline iodide in the juice of the plant. — Comptes Rendus, Mars 25, 

 1850. 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1850. 

 Chiswick. — April 1. Overcast : rain, 2. Cloudy: clear. 3. Fine : showery at 

 night. 4. Boisterous, with rain. 5. Cloudy and rather boisterous : fine : clear. 

 6. Overcast. 7. Cloudy and fine. 8. Foggy: overcast: slight showers. 9. 

 Cloudy. 10. Very fine. 11. Rain: showery: overcast. 12. Fine: hot sun : 

 thunder commenced ^ past 12 noon: overcast at night. 13. Hazy : rain. 14. 

 Hazy: rain at night. 15. Rain: very heavy rain in forenoon: cloudy. 16. 

 Showery. 17. Low white clouds: fine throughout. 18. Clear: very fine. 

 19. Rain. 20. Showery. 21. Slight rain: cloudy. 22. Fine: clear. 23. Over- 

 cast : cloudy. 24. Clear : fine. 25. Fine : overcast and cold : clear at night. 

 26. Cloudy and cold. 27. Fine, but cold. 28, 29. Cloudy : fine, but cold, with 

 excessively dry air. 30. Fine : cloudy. 



Mean temperature of the month 48°'41 



Mean temperature of April 1849 44 '29 



Mean temperature of April for the last twenty-four years ... 47 '53 



Average amount of rain in April 1*46 inch. 



Boston. — April 1. Cloudy. 2. Cloudy: rain v. m. 3. Fine. 4. Cloudy: 

 rain a.m. 5. Cloudy. 6. Cloudy : rain p.m. 7. Cloudy. 8. Cloudy : rain a.m. 

 and P.M. 9. Cloudy: rain p.m. 10. Fine. 11, 12. Cloudy. 13. Cloudy: 

 rain r.M. 14. Cloudy. 15. Cloudy: rain early a.m. 16. Cloudy : rain a.m. 

 and P.M. 1 7. Cloudy : rain. 18. Fine. 19. Cloudy : rain a.m. 20, 21. Cloudy : 

 rain p.m. 22. Cloudy. 23. Cloudy : rain. 24. Cloudy. 25. Fine. 26—28. 

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



Applegarlh Manse, Dumfiies-shire. — April 1,2. Rain, moderate. S. Rain: 

 mild : heavy p.m. 4. Rain heavy during night : drizzling throughout the day. 

 5. Rain in the night : dry and windy. 6. Heavy showers all day. 7. Rain : 

 cleared P.M. 8. Rain. 9. Slight shower. 10. Rain in the night. 11. Frost: 

 clear sunshine. 12. Fine day. 13. Fine a.m. : cold and windy p.m. 14. Strong 

 cold east wind. 15. Rain and high wind. 16. Fair and fine : slight drizzle p.m. 

 17. Fine : shower heavy P.M. 18. Al ild : growing shower. 19. Rain early a.m. : 

 fair day. 20. Rain early : showery day. 21. Fair and fine. 22. Cold and clear. 



23. Cold and clear : slight frost. 24. Cold and clear : frost a.m. 25. Rain and 

 wind : boisterous. 26. Fair : cold. 27. Fair : clear and cold. 28. Fair a.m. : 

 slight shower p.m. 29. Frost early. SO. Cold : a few drops of rain. 



Mean temperature of the month 46''*3 



Mean temperature of April 1849 42*3 



Mean temperature of April for the last twenty-eight years .. 44 "3 



Rain in April 1849 2*52 inches. 



Rain in April for twenty-three years 1*76 inch. 



Sandtvick Manse, Orkney. — April 1. Fog : damp. 2. Cloudy : rain. 3. Damp. 

 4. Rain. 5. Drizzle. 6. Cloudy : hazy a.m. 7. Cloudy : drops a.m. 8. Rain : 

 cloudy. 9. Drizzle: showers. 10. Hazy: clear. 11. Drops: damp. 12. Bright: 

 fine. 13. Cloudy: clear. 14. Clear : cloudy. 15. Drizzle: cloudy. 16. Rain: 

 cloudy. 17. Cloudy. 18. Showers : bright : cloudy. 19. Cloudy : showers : 

 cloudy. 20. Bright: cloudy. 21. Cloudy: drops. 22. Bright: clear. 23, 



24. Cloudy. 25. Bright: clear. 26. Cloudy: drops. 27. Clear; fine, 28. 

 Cloudy : fine, 29, 30. Drops ; cloudy. 



