Meteorological Observations. 479 



COMPOUNDS OF HYDROCHLORATE OF STRYCHNIA AND CYANIDE 

 OF MERCURY. 



M. Brandes states that when a mixture is made of hydrochlorate 

 of strychnia with one of cyanide of mercury, a crystalline precipi- 

 tate is obtained, the composition of which has been hitherto un- 

 known. The author thinks that it is a combination of hydrochlorate 

 of strychnia and cyanide of mercury, corresponding to the formula 

 Str, HCl + 4. UgC\.—Journ. de Ph. et de Ch., Janvier 1849. 



METEOROLOGICAL OBSERVATIONS FOR APRIL 1849. 

 Chiswick, — April 1. Rain : fine : showery. 2. Densely clouded, 3. Fine : 

 cloudy. 4. Foggy: rain. 5. Drizzly: fine. 6. Heavy dew: very fine. 7. Cloudy: 

 drizzly. 8. Hazy. 9. Foggy: densely overcast. 10. Hazy: heavy clouds. 

 11. Cloudy and cold : clear and frosty at night. 12. Cloudy. 13. Rain. 14. 

 Slight haze : fine : clear and frosty. 15. Rain. 16. Cloudy throughout. 17, 

 Cold and dry: clear and frosty at night, 18. Clear: snow; cloudy. 19. Heavy 

 fall of rain, sleet and hail throughout the day. 20. Snow and hail in forenoon, 

 stormy showers : clear and frosty at night. 21. Clear : cloudy : clear and frosty. 

 22. Overcast : rain at night. 23. Rain. 24. Cloudy. 25. Drizzly : fine. 26. 

 Rain : cloudy : clear : slight frost. 27. Foggy ; cloudy : slight rain. 28. Fine : 

 heavy showers : partly hail. 29. Slight haze : very fine : overcast. 30. Fine : 

 clear. 



jNlean temperature of the month 44°"29 



Mean temperature of April 1848., 47 '33 



Mean temperature of April for the last twenty-three years 47 '53 



Average amount of rain in April 1*46 inch. 



Boston. — April 1, Rain: rain a. m, 2. Cloudy : rain p.m. 3. Cloudy. 4. Fine. 

 5. Rain : rain a.m. and p.m. 6. Fine. 7. Fine : rain p.m. 8, 9. Rain : 

 rain A.M. and P.M. 10. Rain : rain a.m. 11, 12, Cloudy. 13. Rain : rain a.m. 

 and rain and snow P.M. 14. Cloudy : rain a.m. 15,16. Cloudy. 17. Fine: 

 snow P.M.: stormy. 18. Fine: rain and snow p.m. 19, 20. Cloudy. 21. Fine. 



22. 23. Fine : rain p.M, 24, 25. Fine. 26. Cloudy : rain early a.m. 27. Fine. 



28. Fine : rain p.m. 29, 30. Fine, 



Applegarlh Manse, Dumfries-shire. — April 1. Showers: thunder. 2. Spring 

 showers. 3. Showers : thunder. 4. Frost : calm and fine. 5. Showers. 6. 

 Fair : beautiful day. 7. Fair, but rigid and ungenial. 8. Slight shower a,m, : 

 parching wind. 9,10. Fair and chilly. 11. Fair and chilly : frost a.m. 12. 

 Cloudy A.M. : rain p.m. J 3. Frost: snow: hail: fine p.m. 14. Snow an inch 

 deep: rain p.m. 15. Fairandfine. 16. Frost: slight shower of snow. 17. Frost 

 very hard : shower of snow. 18. Frost: snow-showers: rain p.m. 19. Frost: 

 shower of snow : fair and keen p.m. 20. Frost : clear and cold : slight shower of 

 snow. 21. Frost very hard : clear and cold. 22. No frost : rain gentle : cloudy. 



23. Rain : soft and warm : blessed change of weather. 24, Fine a.m. : grew 

 cloudy : rain p.m. 25. Fine a.m. : shower of hail : rain. 26. Fine a,m, -. shower. 

 27. Shower early : rain and wind p.m. 28, Growing day : one slight shower. 



29. Fair and fine : cloudy p.m. 30. Most beautiful spring day. 



Mean temperature of the month 42°'3 



Mean temperature of April 1848 43 '2 



Mean temperature of April for the last twenty-five years . 44 '4 



Rain in April 1848 2*52inches. 



Average amount of rain in April for the last twenty years 1*76 „ 

 Sandwich Manse, Orkney. — April 1. Cloudy : rain. 2. Showers : drizzle. 3. 

 Damp : showers. 4. Drizzle, 5. Damp : showers. 6. Damp. 7. Damp : 

 cloudy. 8. Bright: clear. 9. Bright: cloudy. 10, 11. Cloudy. 12. Showers: 

 cloudy. 13. Bright : cloudy. 14. Bright : clear : aurora, 15. Cloudy. 16. 

 Snow-showers : snow. 17. Snow-showers: drift: snow-showers. 18. Snow- 

 showers : frost : aurora, 19. Sleet: hail-showers : aurora. 20. Bright : frost : 

 clear : aurora. 21. Bright : clear : aurora. 22. Cloudy. 23. Drops : cloudy. 



24. Bright : hazy. 25. Clear. 26. Cloudy. 27. Clear. 28. Clear : very clear, 

 29, 30. Fine: cloudy. 



