Meteorological Observatio?is. 529 



The cancrinite from the Ilmeu mountains and that from Litchfield 

 are combinations of true elseolite, 2NaO Si 03+ ^(Al- O* Si Os), with 

 carbonate of lime and carbonate of soda. 



Na^ 02 Si 03 + 2A1'- O ' Si O^+CaO CO*, cancrinite from Ilmen 

 mountains. 



Na2 0« Si 03 4 2A12 03 Si O^ + | f ^^q | CO- + HO, cancrinite 

 from Litchfield.— /?«7VA^ der Berliner Akademie, Feb. 1847. 



New Books. 



Scientific Memoirs, Part XVII., commencing the 5th Volume, 

 containing Schmidt's Contributions to the Comparative Physiology 

 of the Invertebrate Animals, being a PhA'siologico-Chemical Inves- 

 tigation ; Fresnel on the Colours produced in Homogeneous Fluids 

 by Polarized Light ; Jamin on Metallic Reflexion ; Dove's Researches 

 on the Electricity of Induction. 



Manual of British Botany, containing the Flowering Plants and 

 Ferns arranged according to the Natural Orders, by Charles Cardale 

 Babington, M.A., F.L.S. &c. 2nd edit. 



The Elements of Botany, Structural and Physiological, by John 

 Lindley, Ph.D.. F.R.S. &c'. 3rd edit. 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1847. 



Chiswick. — April 1. Slight haze : sleet and hail-showers : frosty. 2. Overcast. 

 5. Cloudy and cold : rain. 4. Overcast. 5. Cloudy : fine. 6. Cloudy : rain at 

 night. 7. Cloudy: rain. 8. Rain: cloudy: clear. 9. Clear and cold. 10. 

 Cloudy: fine. II. Uniformly overcast : rain. 12. Rain : cloudy. 13. Densely 

 clouded. 14. Bleak and cold : slight hail •:Aowers. 15. Snow and hail : clear, 

 cold and dry • sharp frost at night. 16. Sharp frost : cle.ir and cold. 17. Frosty 

 ai:d foggy: cold and dry. l.S. Clear. 19. Clear: cloudy: slight frost. 20. 

 Foggy :1ine, with sun : cloudy. 2). Clear: overcast. 22. Cold haze : frosty. 

 23. Fine : clear at night. 24. Slight haze : fine, with sun : frosty. 25. Foggy : 

 fine. 26. Rain : overcast. 27. Boisterous, with showers. 28. Fine : showery. 

 29. Heavy showers, partly hail : thunder. 30. Clear : heavy clouds avA showers. 



Mean temperatuie of the month 44 -28 



Mean temperature of April 1846 47 '36 



Mean temperature of April for the last twenty years ... 47-20 

 Average amount of rain in April 1-47 inch. 



Boston. — April 1. Cloudy : snow a.m. and p.m.: rain yesterday. 2. Cloudy: 

 large fall of snow a.m. : rain r.\t. 3. Cloudy : snow a.m. : rain j-.m. 4—6. 

 Fine. 7. Cloudy. 8. Rain ; rain early a.m. : stormy, with rain p.m. 9. Stormy. 

 10. Fine. 11. Fine: rain a.m. and p.m. 12, 1.3. Cloudy. 14. Fine. 15. Cloudy: 

 snow-showers. 16. Fine. 17,18. Fine : ice this morning. 19. Cloudy. 20 — 

 23 Fine 24. Fine: rain p.m. 25. Cloudy: rain and hail p.. vi. 26. Rain: 

 rain .a.m. 27. Windy : rain p.m. 28. Windy. 29. Fine. .30. Cloudy : thunder 

 and rain p.m. 



Sandmcif Manse, Orkw,/.— \pri\ 1. Snowing: snow. 2. Snowmg: showers: 

 snow-showers. 3. Cloudy. 4. Bright: damp. 5. Sleet-showers: showers. 

 6 Bright- showers. 7. Bright: hail-showers: aurora. 8. Ram: showers. 

 9 Showers : clear : aurora. 10. Clear. 1 1. Clear : rain. 12. Bright : cloudy. 

 13 Snow-showers : cloudy. 14, 15. Cloudy. 16. Clear : cloudy. 17. Showers: 

 clear 18 Showers: cloudy. 19. Fine : clear. 20. Showers : clear. 21. Cloudy: 

 clear fiost. 22. Bright : cloudy. 23. Bright : showers. 24. Showers : drop;. 

 25. Bright : cloudy. 26. Bright : clear. 27. Bright : rain. 28 Showers : 

 drizzle. 29, 30. Bright : clear. 



Phil. Mag. S. 3. No. 201: Snppl. Vol. 30. 2 N 



