Meteorological Ohservations. 159 



mata in tlie blood ; they are more frequently met ^vith in the blood 

 of the females than of males. 



These observations, in connexion \vith those of I\IM, Valentin* 

 and Glugef, place beyond doubt the existence of different species of 

 animalcules in the blood of cold-blooded animals. Their peculiar 

 form, and the motions with which they are endued, prove that these 

 animalcules are peculiar to the blood, and not animalcules of some 

 tissue, carried by chance into the current of the circulation ; and a 

 proof not less conclusive is, that they are never met with in any 

 solid substance of the animal. The organs of the frogs in which they 

 occur, examined attentively, exhibit no pathological lesion. These 

 animals even present no symptoms whatever of any disease ; and as 

 it is ordinarily in the adults that they occur, their presence in the 

 blood must be attributed to a peculiar and physiological state of the 

 animals. — Comptes Renins, No. 20 for Nov. 1843, p. 1138. 



* M. Valentin discovered a pecnliav Plaematozoon in tlic blood of a Sahtio, 

 wliicli he supposes to belong to the genus Amoeba of Kbrenbeig. 



t M. Gluge observed in tlie heart of a tVog a peculiar animalcule with 

 three lateral appendages. See 'Annals,' vol. x. p. 49, where are also de- 

 tailed tlie observations of M. Vogt on Filaria in the blood of frogs. The au- 

 thor's paper on Filar ice in the blood of a dog will be found at p. 403, vol. xi. 

 — Ed. 



METEOROLOGICAL OBSERVATIONS FOR DECEMBER 1843. 

 Cliiswick. — December 1. Overcast: clear. 2. Frosty haze : very fine: hazy. 

 3. Hazy : cloudy and mild. 4. Drizzly. 5. Cloudy and fine. G. Clear and 

 fine. 7. Drizzly. 8. Very fine. 9. Foggy. 10. Foggy : fine. II. Very fine. 

 12. Dense fog. 13. Foggy; hazy clouds. 14. Clear and fine. 15, IG. Fine, 

 with clouds. 17. Slight haze : clear and fine: foggy. IS. Foggy. 19, 20. Hazy. 

 21. Overcast. 22. Very fine ; thickly overcast. 23. Cloudy and mild. 24. Clear 

 and fine. '25. Hazy : overcast. 2G. Drizzly : foggy. 27. Hazy. 28. Cloudy 

 and fine : hazy. 29. Hazy. 30. Overcast: rain. SI. Cloudy: squally with 

 rain. — Mean temperature of the month 2'26° above the average. 



Boston. — Dec. 1. Cloudy. 2. Fine. 3. Fine, beautiful halo round the moon 

 eight o'clock P.M. 4. Fine. 5. Cloudy. C. Fine. 7. Rain. 8. Fine. 9. Fine: 

 rain P.M. 10. Foggy. 11,12. Cloudy. 13. Foggy. 14. Fine. 1.5. Fine: 

 rain early A.M. 16. Cloudy. 17. Fine. 18 — 20. Foggy. 21. Cloudy. 22 — 



24. Fine. 25—28. Foggy. 29, 30, Cloudy. 31. Fine.— N.B. This is the 

 driest month since February 1832. 



Saiiilwick Ma7ise, Orl:)ni/. — Dec. 1,2. Cloudy, 3. Drizzle. 4. Fine. 5,6. 

 Heavy showers. 7, Rain: showers, 8, Showers : clear. 9. Cloudy. 10,11. 

 Cloudy : clear. 12. Clear. 13. Cloudy. 14. Cloudy : heavy showers. 15,16. 

 Showers. 17. Drizzle. 18. Showers. 19. Cloudy : fine, 20, Fine. 21. Fine: 

 cloudy: tine. 22. Showers: fair: showers. 23. Showers: fair: damp. 24, 



25. Clear : fair, '26. Damp : drizzle, 27. Clear : fine. 28, Clear. 29. Cloudy. 

 ijO. Kain : drizzle. 31. Showers: hail-showers. 



Ap/ilegarth Manse, Dumfries-shire. — Dec. 1, Hoar fiost. 2. Thick fog. 3 — 7. 

 Showers. 8. Fair. 9. Fog and rain p.m. 10 — 13. Cloudy and rain. 14. Fair. 

 15. Slight shower. 16. Fair. 17. Fair and fine. 18. Fair though dull : shower 

 P.M. 19. Fair. 20. Showery. 21. Fair, but thick fog. 22. Very wet and 

 stormy. 23. Slight showers. 24. Slight showers a.m. 25. Showers. 26. Rain 

 v.M. 27. Fair, but cloudy. 28. Slight showers. 29, 30. Fair. 31. Rain. 



Mean temperature of the month 46°'4 



Mean temperature of December 1842 46 '05 



IVIean temperatme of spring-water 46 •! 



