Meteorological Observations. 4-15 



CUMYLE — OIL OF CUMMIN. 



The following are some additional particulars relative to the sub- 

 stances obtained from oil of cummin, liy MM. Gerhardt and Cahours, 

 referred to in our last, p. 282. 



Cumyle (unknown radicle) C« H^^ O^ 



Hydruret of cumyle (oil of cummin) C*" H'-- O^ + H- 



If the hydruret of cumyle be gradually dropped on fused hydra 

 of potash, hydrogen is evolved, and every drop is converted into te 

 minate of potash. The effect is so rapidly produced, that by this 

 method two pounds of cuminate of potash may be obtained in an hour. 



The analysis of the product obtained by distilling cuminic acid 

 vnth. excess of barytes, and the density of its vapour, lead to the 

 formula C^" H-^ which represents four volumes of it. It is there- 

 fore formed in the same manner as benzen. In fact, we have 

 C40 H^-* O* — C* O* = C"^ B", the alkaline base employed effect- 

 ing the separation of carbonic acid. 



This product, to which the authors have given the name of cumen, 

 possesses striking analogies with benzen : thus it dissolves in 

 Nordhausen sulphuric acid, and produces an acid corresponding to 

 the sulphobenzidic acid of Mitscherlich.— -L'/nsfi??^^, No. 389. 



METEOROLOGICAL OBSERVATIONS FOR MARCH 1841. 

 C/mM-ic/t.— March 1. Cloudy. 2. Frosty : rain. 3. Fine: cloudy. 4. Clear 

 and fine : rain. 5. Overcast : slight rain. 6. Clear and very fine. 7, 8. Very 

 fine. 9—12. Foggy in the morning : very fine throughout the day : evening 

 clear. 13. Slight haze: foggy. 14. Foggy: very fine: dense fog at night. 

 15,16. Fofgy: very fine. 17. Cloudy and showery. 18. Cloudy. 19. Over- 

 cast: showery. 20. Fine: stormy with rain. 21. Very fine : slight rain at 

 night. 22. Rain : fine. 23. Fine. 24—26. Very fine. 27. Showery : clear. 

 28—30. Cloudy and fine. 31. Clear: fine but windy ; rain at night. 



Soi/o«.— March 1. Cloudy : rain p.m. 2. Fine : rain p.m. 3, 4. Fine. 5. 

 Fine:rain A.M. andp.M. 6. Fine. 7. Fine : beautiful morning. 8. Foggy. 9—13. 

 Fine 14 Cloudy. 15. Fine : three o'clock p.m. thermometer 65°. 16. Fine: 

 two o'clock P.M. thermometer 65°. 17. Cloudy. 18-21. Windy. 22. Ram : 

 23. Windy. 24, 25. Fine. 26. Fine: rain p.m. 27. Cloudy. 28. l<me. 

 29. Cloudy : rain early a.m. : rain p.m. 30. Fine : rain p.m. 31. Fine. 

 N.B. This is the warmest month of March since March 1830. 

 Applcarlh Manse, Dumfries-shire.— M&xch I. Cold and clear: snow on hills 

 melting. 2. Rain all day. 3. Slight frost. 4. Frost harder : snow. 5. Heavy 

 rain ■ snow gone. 6. Fine a.m. : rain p.m. 7. Fine throughout. 8. Fine 

 spring day: rain a.m. 9. Fine spring day : fair. 10. Growing day : fog p.m. 

 11 Beautiful day. 12. Fine a.m. : raw fog p.m. 13, 14. Fine throughout. 

 15 Fog a.m. : cleared up. 16. Fine throughout. 17, 18. Fine a.m. : rain p.m. 

 19 Rain and hail. 20. Heavy showers. 21, 22. Rain p.m. 23. Cloudy and 

 threatening. 24, 25. Showery and foggy. 26. Showers a.m. : cleared and fine. 

 27. Showers a.m. 28, 29. Showers p.m. 30. Fair a.m.: ram and wind p.m. 

 31. Boisterous and wet. o , j r> 



Sun shone out 23 days. Rain fell 18 days. Frost 2 days. Snow 1 day. Fog 



\\^ind East 1 day. South-east 4 days. South -south-east 1 day. South 4 days. 

 South-south-west 1 day. South-west 1 3 days. West-south-west 2 days. West 

 3 days. North-north-west 1 day. „ . , , , e. 



Variable 1 day. Calm 1 1 days. Moderate 8 days. Brisk 5 days. Strong 

 breeze 5 days. Boisterous 2 days. . .o.^.. 



Mean temperature of the month 44*07 



Mean temperature of March 1 840 39-35 



Mean temperature of spring-water 45 "60 



Mean teroperatureofepring-water, March 1840 42 -60 



