Meteorological Observations. 159 



mains in solution. This purpurate [of copper] is a powder of a fine 

 deep violet colour. The red salt of barytes, treated with sulphate of 

 soda, yields sulphate of barytes, and there remains a mixture of pur- 

 purate and hydrocyanate of soda, which separate very well by 

 spontaneous evaporation. The purpurate collects on the edges of 

 the capsule ; it crystallizes like cauliflowers, and of a fine crimson 

 colour unalterable in the air. The cuprocyanate of sodium remains 

 at the bottom of the capsule in the form of small fine needles, which 

 are also unalterable. 



Argento-cyanogen. Argento- cyanide of Potassium. — This salt cry- 

 stallizes in tables analogous to those of chlorate of potash ; it is ob- 

 tained by dissolving to saturation cyanide of silver in cyanide of 

 potassium ; the solution is to be filtered, evaporated, and crystallized. 



Argento-hydrocyanic Acid.— -This is prepared by dissolving cyanide 

 of silver in cyanide of barium, and precipitating the barytes with 

 sulphuric acid ; it is a yellowish acid of considerable stability, pos- 

 sessing the smell of hydrocyanic acid ; it is very weak, but still it 

 combines very well with alkaline bases ; it acts upon carbonates 

 with greater difficulty. 



Hydrargyro-cyanide of Potassium. — This salt is analogous to the 

 preceding, and is prepared in the same manner ; it is white, very 

 soluble, and assumes the form of small granular crystals. Similar 

 compounds may be formed with a great number of other salts, as those 

 of cobalt, nickel and cadmium. These the author proposes to de- 

 scribe when he gives the analyses of those already mentioned. — Journal 

 de Pharm. et de Chimie, Juin 1843. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 1843. 



Chiswick. — June 1. Cloudy and fine. 2. Rain : dense clouds: boisterous, with 

 rain at night. 3. Cloudy and line : clear. 4. Very fine. 5. Fine : heavy show- 

 ers : clear. 6. Showery. 7. Fine : rain. 8. Cloudy : showery : boisterous, with 

 heavy rain at night. 9. Cloudy and windy : boisterous, with showers and bright 

 sunshine at intervals. 10. Fine : rain. 11. Cloudy and fine. 12. Hazy clouds: 

 rain. 13. Heavy rain. 14. Foggy: cloudy : foggy at night. 15. Hazy : fine. 

 16— 18. Very fine. 19. Overcast. 20. Cloudy. 21, 22. Very fine. 23. Cloud- 

 less, with bright sun. 24. Slight haze : fine. 25. Densely overcast. 26. Very 

 fine. 27. Sultry, with hot dry air. 28. Cloudy and fine. 29,30. Overcast anil 

 fine. — Mean temperature of the month about 4° below the average. 



Boston. — June 1. Cloudy : rain early a.m. 2, 3. Cloudy : rain p.m. 4. Fine : 

 rain p.m. 5,6. Fine. 7. Cloudy. 8,9. Windy: rain early a.m. 10. Windy. 



11. Cloudy: rain p.m. 12. Windy. 13. Windy: rain p.m. 14, 15. Fine. 

 16. Fine : curious halo round the sun 2 to 4 p.m. 17, 18. Cloudy. 19, 20. 

 Windy. 21—23. Fine. 24—28. Cloudy. 29. Windy. 30. Cloudy. 



Sandwich Manse, Orkney. — June 1. Bright: damp. 2. Cloudy : drizzle. 3. 

 Rain : showers. 4. Cloudy. 5. Bright : clear. 6. Bright : cloudy. 7. Cloudy : 

 clear. 8. Rain: clear. 9. Damp: drizzle. 10. Showers. 11. Showers: damp. 



12. Bright: cloudy. 13. Cloudy: fine. 14. Fine. 15 — 17. Fine: warm. 

 18 — 20. Cloudy. 21. Showers : cloudy. 22. Clear : cloudy. 23. Cloudy: 

 drizzle. 24. Bright : fine. 25. Bright : clear. 26. Bright : cloudy. 27, 28. 

 Cloudy. 29. Drops : showers. 30. Cloudy : damp. 



■Applegarth Manse, Dumfries- shire. — June 1. Wet all day. 2. Slight showers : 

 warm. 3. Wet nearly all day. 4. Fair and cold. 5. Bain all day. 6. Fair, 

 but cloudy. 7. Rain : thunder. 8. Rain. 9. Showers. 10. Dry and windy. 

 1 1 — 23. Fair and clear. 24. Fair and clear : thunder. 25 — 28. Fair and clear. 

 29, 30. Fair and clear : cloudy. 



