422 M, Berzeliiis on Isomorphism as [June, 



Article IV. 



AstroHomical Observations, 1826. 

 By Col. Beaufoy, FRS. 



Bushey Heath, near Stanmore. 



Latitude Sl^ 3T 44-3" North. Longitude West in time 1' 20'93". 



]May 1. Emersion of Jupiter's first ( 8h 49' 50" IMean Time at Bushey. 



satellite ( 8 51 _ 1 1 JMean Time at Greenwich. 



May 1. Emersion of Jupiter's second) 10 30 29 Mean Time at Bushey. 



satellite (10 31 60*7 Mean Time at Greenwich. 



April 16. Occultation x Cancer by the Moon. 



^J^^-'^^^on 12 57 48-5?g;^^^^Yj^^ 



Emersion 13 15 02 \ 



K. B. Immersion instantaneous, and no perceptible diminution of the star's h'ght. 

 At the Emersion the moon's limb was tremulous. 



Article V. 



On the Alterations that must necessarily be made in the System of 

 Chemical Mineralogy, in consequence of the Property oj'lsomor- 

 phous Bodies to replace one another in indefinite Froportio7is. 

 By M. J. Berzeliiis. 



{Concluded from p. 386.) 



Classification of Minerals according to their most Electro-negative 



Eletnent. 



Class I. — Minerals composed after the Manner of Inorganic 



Substances. 



1st Family. Iron, 

 Meteoric iron Fe (Ni Co Cli) 



2. F. Copper. 



Native copper Cu 



3. F. BisvititJi. 



Native bismuth Bi 



4. F. Silver. 



Native silver Ag 



5. F. Mercury. 



Native mercury Hg 



Amalgam Ag Hg'' 



6. F. Palladium. 



Native palladium Pa 



7. Platina. 



Native Platina Pt 



8. F. Osmium. 



Osmiiuet of iridium. Ir Os'' ^^ 



