Meteorological Observations. 159 



The mean of several experiments gave as the composition of this 



substance, Platina 53'5883 



Chlorine 19' 1010 



Carbon 19'4260 



Hydrogen 2-8980 



Oxygen 4'9867 



100- 

 which, according to M. Zeise, are equivalent to 



1 atom of platina 1233-260 53-6920 



2 atoms of chlorine 442'650 19-2710 



6 atoms of carbon 458-622 19-6660 



10 atoms of hydrogen . . 62'398 2'7166 



1 atom of oxygen lOO'OOO 4-3537 



99-6993 

 Ann. de Chim. ct de Phys., t. Ixxii. 



NITRITES FORMED BY DIRECT COMBINATION. 



M. J. Fritzche forms these salts by passing nitrous acid, procured 

 from the action of nitric acid upon starch, into water containing 

 finely divided oxide of lead ; the oxide is quickly converted into a 

 white mass, which, on continuing to pass the nitrous acid gas into 

 it, completely dissolves. The deep yellow solution thus obtained, 

 yields by evaporation with a gentle heat a considerable quantity of 

 nitrite of lead in yellow silky scales. A very small quantity of 

 nitrate is formed in this operation ; there is, therefore, no doubt 

 that nitrous acid can combine directly with bases. L'Institut, 

 No. 341. 



METEOROLOGICAL OBSERVATIONS FOR JUNE 3 1840. 



Chiswick. June 1. Very hot and dry. 2. Thunder storm, with rain in heavy 

 showers. 3. Fine. 4. Overcast. 5. Drizzly. 6. Cloudless and hot : heavy 

 rain at night. 7 11. Very fine. 12. Overcast and fine. 13 15. Very fine. 

 16. Hot and dry. 17. Fine: showery. 18. Showery in the morning: windy. 

 19. Slight rain. 20 24. Very fine. 25 29. Cloudy and fine. 30. Hazy :rain. 



The mean temperature was within a fraction of the average for this month. 

 The quantity of rain was moderate. Westerly winds were unusually prevalent. 

 On the whole the weather may be considered as. having been favourable. 



Boston. Junel. Fine: Therm. 78 one o'clock. 2. Cloudy: Therm, at noon 

 53: rain P.M. 3,4. Cloudy: rain P.M. 5,6. Cloudy. 7. Fine: rain early 

 A.M. 8. Fine. 9. Cloudy: rain P.M. 10, 11. Fine. 12. Cloudy: rain P.M. 

 13,14. Fine. 15. Cloudy. 16. Fine. 17. Fine: rain early A.M. 18. Cloudy. 



19. Rain. 20. Fine. 21. Cloudy : rain P.M. 22. Fine: rain early A.M. : rain 

 P.M. 23. Fine: rain P.M. 24. Fine. 25. Cloudy: rain A.M. and P.M. 26. 

 Fine. 27, 28, 29. Cloudy. 30. Fine. 



Applegarth Manse, Dumfries-shire. June 1 , 2. Mild with occasional showers. 

 3. Fine day : bright sunshine. 4. Cloudy but dry. 5. Rain in the evening. 

 6. Rain in the morning. 7,8. Very fine day. 9. Showery all day. 10. Fine 

 day : rain early. 11. The same, but fair. 12. Wet all day. 13. Very fine day. 

 14. Wet greater part of the day : thunder. 15. Wet afternoon. 16, 17. Stormy 

 and wet afternoon. 18. Showery, but calm. 19. Wet A.M.: cleared up P.M. 



20. Showery A.M. : cleared and fine. 21. Showery 'all day. 22. Rain A.M. 23. 

 The same: cleared and was fine. 24. Fair all day and cold. 25. Showery. 

 26. Drizzling all day. 27. Showery. 28, 29. Beautiful summer day. 30. Wet 

 morning. 



