Intelligence and Miscellaneous Articles. 143 



NATIVE IODIDE OF MERCURY. 



M. Del Rio having noticed on some specimens of seleniuret of 

 mercury in the collection of L'Ecole des Mines of Mexico, some 

 particles of a reddish brown colour, submitted them to the blow- 

 pipe, when they afforded evident indications of iodide of mercury, 

 agreeing in its characters with the artificial iodide. — Journ. de Chim. 

 Med. Feb. 1837. 



CARBOMETHYLATE OF BARYTES. 

 This salt occurs in white shining plates, is soluble in water, and 

 is not decomposed by exposure to the atmosphere nor in vacuo : its 

 composition according to MM. Dumas and Peligot the discoverers 

 is indicated by the formula 



BaO + 00* + C*H 9 + C*0* + OH. 



Dissolved in water it spontaneously decomposes even at common 

 temperatures, into carbonate of barytes, carbonic acid, and pyroxylic 

 spirit (bihydrate of methylene or carbo-hydrogen). This decom- 

 position is accelerated by heat, and is complete before the aqueous 

 solution is raised to ebullition. — Ulnstitut, 20th March. 



ANALYSIS OF GADOLIN1TE. BY MR. A. CONNELL. 



Yttria 36-54? 



Glucina .5*90 



Protoxide of cerium 14*31 



Protoxide of iron 14*14 



Silica 27-10 



Lime *45 



98*44 

 In the statement of this analysis in the New Edition of Phillips's 

 Mineralogy, the silica has been, by a typographical error, omitted. 



METEOROLOGICAL OBSERVATIONS FOR MAY 1837. 



Chiswick. — May I, 2. Fine. 3. Hazy. 4 — 7. Very fine. 8. Rain. 

 9. Cloudy; fine, clear and cold. 10. Cloudy and cold. 11. Fine. 



12. Drizzly. 13. Fine: rain. 14. Hazy : cloudy and fine. 15. Cloudy, 

 and cold : fine. 16 — 18. Fine. 19. Cold rain. 20, 21. Slight rain. 

 22. Cloudy and cold : hail showers : stormy with rain. 23. Cloudy. 



24. Slight haze : frosty at night. 25 — 29. Very fine. 30. Fine : rain 



at night. 31. Slight rain. 



Erratum. — In the last Number, the minimum average of the barome- 

 trical pressure should be 29*777 instead of 29-868, which it will be ob- 

 served is the average of the max. observation!. 



Boston.— May 1. Cloudy. 2— 5. Fine. 6. Cloudy. 7. Fine. 



8. Cloudy : rain early a.m. : rain p.m. 9. Cloudy. 10. Fine : rain and 

 hail a.m. and p.m. 11. Fine. 12. Cloudy. 13, 14. Fine. 15. Fine, 

 rain p.m. 16. Cloudy. 17, 18. Fine. 19, 20. Cloudy: rain early a.m. : 

 21. Cloudy. 22. Fine : rain early a.m. 23. Fine. 24. Cloudy. 



25—28. Fine. 29. Cloudy. 30. Cloudy: rain and hail with thunder 

 and lightning p.m. 31. Fine. 



