Meteorological Observations. 415 



polis by the existing Water Companies, rendering each water much 

 softer, preventing a fur on boiling, separating vegetating and co- 

 louring matter, destroying numerous water-insects, and withdrawing 

 from solution large quantities of solid matter, not separable by mere 

 filtration. By Thomas Clark, Professor of Chemistry in the Uni- 

 versity of Aberdeen. 2nd edit. 8vo. 



An Illustrated Catalogue of British Plants, arranged according to 

 the Natural Orders, with references to Smith, Hooker, Lindley, 

 Macreight, &c. By C. E. Sowerby, A.L.S. To be continued 

 monthly. 



An Essay on Single Vision. By John Thomas Woodhotjse, 

 M.D., Fellow of Gonville and Caius College, Cambridge. 



A Practical Treatise on the Manufacture and Distribution of 

 Coal- Gas ; its Introduction and progressive Improvement ; illustrated 

 by Engravings from working drawings, with general estimates. By 

 Samuel Clegg, Jun., Civil Engineer. 



Preparing for Publication. 

 The Geology and Mineralogy of Engineering ; comprehend- 

 ing the elements of the sciences of GLconomic Geology andMineralogy 

 applied to the Arts. By E. W. Brayley, Jun., Fellow of the Lin- 

 nsean and Geological Societies ; Associate of the Institution of 

 Civil Engineers ; Corresponding Member of the Royal Geological 

 Society of Cornwall, &c. 



METEOROLOGICAL OBSERVATIONS FOR SEPT. 1841. 



Chiswick. — Sept. 1. Very fine. 2. Slight fog: very fine: clear. 3. Very 

 fine : showery : heavy rain. 4. Stormy and wet. 5. Cloudy and fine : rain : 

 cold fog. 6. Dense fog : hazy : foggy at night. 7. Foggy : rain. 8. Fine. 

 9. Overcast. 10,11. Foggy : very fine. 12,18. Very hot for the period of the 

 season. 14. Dry haze : very fine. 15. Very fine: rain at night. 16—20. Very 

 fine. 21. Hazy: very fine. 22. Rain: very fine. 23. Heavy rain. 24. Cloudy: 

 rain. 25. Showery. 26. Showery : stormy with rain at night. 27. Fine : light- 

 ning and very heavy rain at night. 28. Rain : boisterous. 29. Boisterous : 

 clear at night. 30. Boisterous, with rain : clear and fine. 



Boston. — Sep*. 1. Foggy : rain yesterday p.m. 2. Fine. 3. Rain : heavy rain 

 p.m. 4. Cloudy : stormy, with rain p.m. 5. Cloudy : rain p.m. 6. Fine. 7. 

 Cloudy : rain p.m. 8. Cloudy. 9. Fine. 10. Cloudy : thermometer 74° three 

 o'clock. 11. Cloudy. 12. Fine : thermometer 80° half-past eleven o'clock a.m. 

 13. Fine: thermometer 74° three o'clock p.m. 14. Fine. 15. Cloudy. 16. Fine : 

 rain a.m. 17. Fine. 18. Foggy. 19—21. Cloudy. 22. Cloudy: rain a.m. 

 23. Rain a.m. 24. Cloudy : rain early a.m. 25. Fine. 26. Cloudy : rain 

 early a.m. : rain p.m. 27. Fine. 28. Stormy : rain early a.m. 29. Stormy. 30. 

 Cloudy : rain early a.m. : rain p.m. 



Applegarth Manse, Dumfries- shire. — Sept. 1. Fair till p.m., then rained. 2. 

 Continued rain p.m. 3. Fair and fine. 4. Fair and fine, but cloudy a.m. 5. Fair 

 and fine. 6. Fair and fine: hoar-frost a.m. 7. Cloudy a.m: rain p.m. 8. Wet 

 a.m.: cleared up. 9. Wet nearly all day. 10. Wet throughout. 11. Cloudy 

 a.m.: wet p.m. 12. Hot sun : fiery wind : thunder. 13. Clear: fiery wind : 

 thunder. 14. Showery a.m.: wet p.m.: thunder. 15. Cloudy, but fair: 

 thunder. 16. One shower. 17. Fair and clear. 18, 19. Fair and fine. 20, 

 21. Fair and fine, though windy. 22. Shower in the afternoon. 23. Fair and 

 fine. 24, 25. Showers. 26. Wet a.m. : cleared and was fine. 27. Fair but 

 threatening. 28. Heavy showers. 29. Heavy rain all day : thunder. 30. One 

 or two slight showers. 



Sun shone out 26 days. Rain fell 15 days. Thunder 5 days. Frost, hoar, 2 



