Meteorological Observations, 79 



The intermediate stages of growth of the above-mentioned entozoa 

 are still unknown ; but from the extreme variety of forms known to 

 be assumed by some of the Trematoda at different stages of their 

 development, it may be supposed, without much improbability, that 

 we are already familiar with the younger conditions of some of them, 

 and have recognized them as different species. M. Blanchard 

 directs particular attention to the enormous numbers of the ova of 

 these animals, as showing that a vast majority of them must be 

 abortive, probably in consequence of not meeting with the proper 

 conditions for their development. 



The author has examined a very large number of foetal animals, 

 the adults of which are apt to be infested with the above parasites ; 

 but has never, in any instance, found a foetus so infested. He 

 directs attention to this fact as strongly indicating the necessity of 

 the introduction of the ova from without, probably along with the 

 alimentary matters. — Comptes Rendus, March 1848. 



METEOROLOGICAL OBSERVATIONS FOR MAY 1848. 

 Chiswick. — May 1 . Fine : cloudless, with very dry air. 2. Dry haze. 3, 4. 

 Slight fog : fine : clear. 5 — 7. Very fine. 8. Excessively dry air. 9, 10. Very 

 fine. 11 — 13. Hot and very dry. 14. Fine. 15. Slight haze : cloudy and fine. 



16. Cloudless and very fine. 17. Very fine. 18. Fine: large white clouds: 

 thunder and hail -shower in afternoon: clear at night. 19. Cloudy: slight 

 showers. 20. Showery. 21. Fine : slight rain. 22. Very fine. 23. Cloudless. 

 24. Fine. 25. Clear : cloudy : clear. 26. Foggy : fine, with slight haze : clear. 

 27. Overcast. 28. Very fine : slight haze. 29. Very fine : hot and dry : par- 

 tially overcast at night. 30, 31. Fine. 



Mean temperature of the month 58°'12 



Mean temperature of May 1847 56 '83 



Mean temperature of May for the last twenty years 55 *91 



Average amount of rain in May 1-84 inch. 



Boston. — May 1 — 8. Fine. 9. Cloudy. 10. Fine. 11. Fine: two o'clock 

 thermometer 78°. 12. Fine. 13. Cloudy. 14. Fine. 15. Cloudy. 16. Fine. 



17. Fine: rain, thunder and lightning p.m. 18,19. Fine. 20. Cloudy. 21. 

 Fine. 22. Cloudy. 23—26. Fine. 27. Cloudy. 28, 29. Fine. 30. Cloudy. 

 31. Fine : rain p.m. 



Applegarth Manse, Dumfries-shire. — May 1 . Slight frost a.m. : fine. 2. Fine, 

 but cloudy. 3. Very fine. 4. Beautiful day. 5. Beautiful day : getting cloudy. 

 6. Beautiful day. 7. Slight rain p.m. 8. Heavy rain early. 9, 10. Fine 

 summer days. 11. Fine summer day : overcast. 12. Fine summer day : still 

 fair. 13. Fine summer day : fine : clear. 14. Fine summer day : slight shower : 

 thunder. 15. Cloudy : rain p.m. 16. Cloudy a.m. : clear p.m. 17. Clear and 

 fine. 18. Cloudy : cleared. 19. Wet a.m., but fine. 20. Cloudy a.m. : fine p.m. 

 21. Dull and drizzling : cleared. 22,23. Beautiful summer day. 24. Beau- 

 tiful summer day : distant thunder : shower. 25. Beautiful day. 26. Clear a.m. : 

 shower p.m. 27. Warm and fine. 28. Rain a.m. : showery all day. 29, 80. 

 Fair and fine. 31. Heavy rain all day. 



Mean temperature of the month ' 52 0, 9 



Mean temperature of May 1847 51 "1 



Mean temperature of May for twenty-five years 51 '09 



Rain in May for twenty years 1*69 inch. 



Sandwick Manse, Orkney. — May]. Clear. 2. Fine. 3. Rain: fine. 4,5. 

 Fine. 6. Fine : cloudy. 7. Cloudy : showers. 8, 9. Clear. 10. Damp. 

 11. Fine: showers. 12. Bright : drizzle. 13. Drizzle : damp. 14. Clear: fine. 

 15. Cloudy: drizzle. 16. Rain: showers. 17. Clear: cloudy. 18. Fog: 

 showers. 19. Clear: cloudy. 20. Drops: fine. 21. Clear: cloudy. 22. 

 Cloudy. 23. Fog: damp. 24. Bright: damp. 25. Bright: cloudy. 26. 

 Cloudy. 27. Bright : rain. 28. Bright: cloudy. 29. Clear : drops. 30. Cloudy : 

 clear. 31. Rain. 



