Meteorological Observations. 399 



separate by disarticulation, and their remains are found arranged in 

 spiral lines upon the outside, so as to give the short, thick rhizome 

 the aspect of a piece of a palm stem. As in Nuphar, the roots are 

 produced in bundles at the bases of the petioles, and fall off suc- 

 cessively upwards as the new ones are developed, leaving very con- 

 spicuous scars. The internal structure of the stem is quite Mono- 

 cotyledonous in its character, presenting no trace of the arrange- 

 ment of the vascular bundles into rings of wood, no true woody 

 fibres, and no cambium layer. The vascular bundles, which are 

 composed exclusively of spiral, annular and reticulated ducts sur- 

 rounded by elongated parenchymatous cellular tissue, are isolated 

 and arranged just as in Monocotyledons, such as the Palms ; and the 

 outer part of the stem exhibits a cortical parenchyma, much more 

 like that of the herbaceous rhizomes of the rush- like plants, than 

 any other known structure ; it bears not the least resemblance to 

 the bark of Dicotyledons. The results of the investigation show 

 that Victoria, like Nuphar, has a stem of essentially Monocotyle- 

 donous structure, 'i'he paper was accompanied by drawings illus- 

 trating the general and microscopic anatomy of the stem. — Proc. 

 Royal Society. 



METEOKOLOGICAL OBSERVATIONS FOR SEPT. 1852. 



Chiawick. — September 1. Slight rain. 2. Foggy : cloudless and hot. 3, 4. Very 

 fine. 5. Overcast : clear. 6. Very fine : rain at night. 7. Hazy : rain. 8. Heavy 

 rain : thunder and lightning : cloudy : clear at night. 9. Cloudy: showery. 10. 

 Cloudy. 11,12. Fine. 13. Very fine. 14. Clear: dry air : densely overcast at 

 night. 15. Overcast. 16. Fine: clear and cold at night. 17. Slight fog, with 

 very hefivy dew : very fine : clear and cold. 18. Foggy : heavy rain. 19. Cloudy : 

 uniforndy overcast. 20. Slight rain : showery : clear. 21. Boisterous, wiiii rain. 

 22. Clear : very fine. 23, Overcast : very fine. 24. Foggy : very fine : dense fog 

 at night. 25. Dense fog: very fine. 26. Heavy dew : foggy : hazy throughout. 

 27. Dense fog : overcast : heavy rain at night. 28. Constant rain : barometer very 

 low : foggy. 29. Cloudy : slight showers : cloudy. 30. Overcast : fine but windy : 

 overcast. 



Mean temperature of the month 56°"20 



Mean temperature of Sept. 1851 55*15 



Mean temperature of Sept. for the last twenty-six years ... 57 '15 

 Average amount of rain in Sept 2*52 inches. 



Boston. — Sept. 1. Cloudy. 2. Fine. 3,4. Cloudy. 5. Cloudy: rain a.m. 

 6. Cloudy: rain p.m. 7. Cloudy: rain : thunder and lightning early a.m. : rain p.m. 



8. Fine. 9. Fine : rain p.m. 10. Fine. 11— 13. Cloudy. 14. Fine. 15. Cloudy : 

 rain a.m. and p.m. 16. Fine: rain early a.m. 17. Fine. 18. Fine: rain a.m. 

 and p.m. 19,20. Cloudy : rain early a.m. 21. Rain : rain a.m. 22. Fine. 23. 

 Cloudy. 24. Fine. 25 — 27. Foggy. 28. Rain : rain a.m. and p.m. 29. Cloudy : 

 rain a.m. 30. Fine. 



Sandivick Manse, Orkney. — Sept. 1. Showers. 2. Clear: fine: cloudy: fine. 

 3, Clear: fine. 4. Bright : clear: fine: aurora. 5. Fog. 6. Hazy : cloudy. 7 — 



9. Fine: clear: fine. 10. Cloudy: showers. 11. Showers: drops: aurora. 

 12. Showers: aurora. 13,14. Sleet-showers. 15,16. Showers. 17. Bright: 

 showers : aurora. 18. Drizzle : rain. 19. Bright : clear ; rain. 20, 21. Bright : 

 cloudy : rain, 22. Showers : cloudy. 23. Cloudy : rain. 24. Showers : clear. 

 25. Bright : cloudy. 26. Clear. 27. Showers : rain. 28. Showers : lunar rain- 

 bow. 29. Bright : cloudy : rain. 30. Raia: cloudy. 



Mean temperature of Sept. for twenty-five years 52°'22 



Mean temperature of this month 53 "45 



Average quantity of rain in Sept. for six years 2 49 inches. 



