Meteorological Observations. 79 



llme._ But there is no known reagent v/hich acts similarly towards 

 solution of barytes and lime, and differently towards solutions of 

 strontian. Fcrrocyanate of potash is. however, such a reagent; 

 this occasions precipitates in neutral solutions of barytes and lime, 

 provided they are not too dilute ; they are, according to Mosander 

 and Duflos, combinations of ferrocyanate of potash and barytes, and 

 of ferrocyanate of potash and lime. Even in diluted solutions of 

 barytes this compound after some time crystallizes on the sides of 

 the glass in very distinct crystals. Bunsen has described them in 

 Poggendorff s A7in. vol. xxxvi. Strontian is not precipitated from so- 

 lutions even when concentrated, nor are any crystals formed after 

 resting for a long time. It appears, therefore, that ferrocyanate of 

 potash in combination with strontian forms a soluble salt. By this 

 means a neutral solution of strontian may be distinguished from one 

 of barytes, and from lime, and also from magnesia, as the latter like- 

 wise gives a precipitate with ferrocyanate of potash. — Poggendorff' s 

 Annalen. 1838. No. 7. p. 445. 



British Association for the Advancement of Science : Instru- 

 ments FOR THE Alleviation of Deafness. 



We are requested to intimate, that a Committee having been ap- 

 pointed at the Newcastle meeting of the British Association, held in 

 the month of August last, for the purpose of considering and re- 

 porting on the instruments which may be deemed best adapted for 

 assisting the hearing in cases of deafness, the Committee Avill be 

 happy in being favoured with the co-operation of such persons as 

 may be disposed to assist their inquiries, either by suggestions, or 

 by the loan of instruments or apparatus in explanation of their views. 



Letters or parcels are requested to be transmitbed, postage or 

 carriage paid, to the care of Messrs. Taylor, Red Lion Court, Fleet 

 Street, Printers to the Association. 



METEOROLOGICAL OBSERVATIONS FOR NOVEMBER 183S. 



Chiswick. — Nov. 1. Overcast: rain: clear at night. 2,^. Fine. 4. Rain. 

 5. Fine. 6. Very fine. 7. Rain : fine : windy at night. 8. Clear and fine : 

 rain. 9. Heavy rain. 10. Clear and fine. II. Dense fog. 12. Clear .md 

 cold. 13. Frosty: fine. 14. Frosty and foggy. 15, IG. Foggy. 17. Foo-o-y • 

 fine. 18,19. Rain. 20. Cold haze. 21— 2.'?. Foggy. 24. Bleak and cold.'"25^ 

 26. Frosty. 27. Overcast. 28. Heavy rain : hurricane at night. 29. Boisterl 

 ous with heavy rain: much thunder and lightning at night. 30. Rain. fine. 



Boilnn.—'iio\ . 1. Fine: rain early a.m. 2, 3. Fine: rain i-.m. 4. Cloudy: 

 ram P.M. 5. Cloudy. G. Fine. 7. Cloudy: rain early a.m. 8. Fine. 9 10 

 Cloudy. II. Foggy. 12, 13. Fine. 14. Foggy. 15. Cloudy, 16, 17. Foggy! 

 18. Cloudy: rain a.m. and i-.m. 19. Stormy. 20,21. Cloudy. 22. Cloudy 

 ram early A.M. 23, 24. Cloudy. 25, 2G. Fine. 27. Stormy. 28, Cloudy ': 

 stormy with rain p.m. 29. Stormy : rain early a.m. 30. Stormy. 



Apjylegarlh Manse, Bumfries-shirc. — Nov. 1 . Heavy showers : hail. 2. Fair 

 but cloudy. 3. Frequent showers. 4. Fair and Jloudy. 5. Moist: slight 

 showers. C. Fair: one slight shower. 7. Rain all day : high flood. 8. Occa- 

 sional showers. 9. Fine day. 10. Fine day : rain p.m. 11. Fine day after 

 snow. 12. Hard frost: clear and serene. 13. Temperate. 14. Cloudy and 

 raw. 15. Thick fog. J G. Cleared up : dry. 17. Rain in the night : cold, 

 18. Cold drying day : snow on hills. 19. Cold and threatening a fall. 20. 

 Still cold, yet dry. 21. Still threatening a fall. 22— 2G. Cold and dry, 27. 

 Cold : snow three inches deep. 28. Wet in the night : ditto p.m. 29. Very 

 wet day and Stormy. GO. Showery and storroy : flood. 



