Meteorological Observations. 159 



mala in the blood ; they are more frequently met with in the blood 

 of the females than of males. 



These observations, in connexion with those of MM. 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 

 anim.als 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.— Co?wp^e5 Rendus, No. 20 for Nov. 1843, p. U38. 



* M. Valentin discovered a peculiar Haematozoon in the blood of a Salmo, 

 which he supposes to belong to the genus Amoeba of Ehrenberg. 



t M. Gluge observed in the heart of a frog a peculiar aniipalcule wijh 

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

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

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

 —Ed. 



METEOROLOGICAL OBSERVATIONS FOR DECEMBER 1843. 



Chiswick. — December]. Overcast: clear. 2. Frosty haze : very fine: hazy. 

 3. Hazy : cloudy and mild. 4. Drizzly. 5. Cloudy and fine. 6. Clear and 

 fine. 7. Drizzly. 8. "Very fine. 9. Foggy. 10. Foggy : fine. 11. Very fine. 

 12. Dense fog. 13. Foggy, hazy clouds. 14. Clear and fine. 15, 16. Fine, 

 with clouds. 17. Sh'ght haze : clear and fine: foggy. 18. Foggy, 19, 20. Hazy. 

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

 and fine. 2.5. Hazy : overcast. 26. Drizzly : foggy. 27. Hazy. 28. Cloudy 

 and fine : hazy. 29. Hazy. 30. Overcast: rain. 31. 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 I'.M. 4. Fine. 5. Cloudy. 6. Fine. 7. Rain. 8. Fine. 9. Fine: 

 rain P.M. 10. Foggy. 11,12. Cloudy. 13. Foggy. 14. Fine. 15. 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. 



Sandiv'ick Manse, Orhieij. — Dec. 1, 2. Cloudy. 3. Drizzle. 4. Fine. 5j 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. 

 CO. Rain: drizzle. 31. Showers: hail-showers. 



Applegarth MnnsCy 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 

 btormy. 25^. Slight showers. 24. Slight showers a.m. 25. Showers. 26. Rain 

 r.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 



Mean temperature of spring-water 46*1 



