148 Scientific Intelligence. 



cadmium, mercurous, aluminum, yttrium, erbium, cerium, lantha- 

 num and didvitiiuni [il:i t< niitrites, and silver, glucinum, aluminum, 

 chromous, indium and ferric diplatonitrites. The former salts 

 are for the most part beautifully crystallized, though the solution 

 must be concentrated, since they are very soluble' in water. The 

 d [ lit it t i, with the exception of the silver salt, which is green, 

 are characterized by their brilliant red color. — Ber. Berl. (Jhem. 

 Ges., ix, 1722, Dec. 1876. g. f. b. 



4. On the behavior of Palladia),, in the Alcohol flame.— 

 "Woiii.ei:, as earlv as 1824. having observed that palladium, cithi r 

 in the form of foil or sponge, when heated in an alcohol flame 

 covered itself with a thick layer of carbon, rendering the metal 

 porous and brittle, and having, upon (iraham's discovery of the 

 remarkable occlusion of hvdro<rt n l>v this metal, assumed this as 

 the cause of the phenomenon observed by him, has now sought to 

 verify the supposition by passing pure dry ethylene gas over 

 palladium sponge, first at 100°, then at higher temperatures; but 

 no result w T as obtained until a red la at was reached, when carbon 

 was deposited and hydrogen evolved; the temperature being 

 below that, however, at which ethylene itself decomposes. Since 

 » ■ i, t - ■ tlinity lor carbon, the author suggests that the 



result observed may be due to an alternate union with hydrogen 

 and separation therefrom. He also d< -scribes a convenient appa- 

 ratus for showing the absorption of hydrogen by palla 

 its evolution on heating.- Bo: Ba-L* Chcm. Ges., ix, 1 7 i 3, Dec. 

 1876. G. F. B. 



5. On two new Z>ichlo,-»>i/,hth„kn,s.—TLhe a and fi varieties 

 of diehlornaphthalene, described by Faust and Saame, have 

 fusing points of 35-36° and of 68° respectively ; the y variety, 

 obtained by Atterberg, fuses at 107°. Clkve has prepared two 

 new forms of this substance, tf-dichlornaphthalene, fusing at 114°, 

 and f-dichlornaphthalene, fusing at 135*, by the action of phos- 

 phoric chloride upon the calcium salts of the two napthalene-di- 

 sulpl -mi, ,, ids ,h scribed by Ebert and Merz. The former body 

 is easily soluble in boiling alcohol, from which it crystallizes in 

 broad brilliant plates. The latter is much less soluble and crys- 

 tallizes in brilliant frimn*-~JBull. Xoc. <h., II, xxvi, 244, Oct. 



6. Emodinfrom the bark of Rhamnus franqvla.- -Liebkkmank 

 and Wall-, .stance con- 

 tained in the bark of Rhamnus frangula (buckthorn) with a view 

 to ascertain the relation of the frangulinic acid of Faust, whieh he 



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