350 Action of Sulphuretted Hydrogen upon Nitric Acetene. 



long, mncronate, white and membranous on the edges, shorter 

 than the fruit ; plant fine green. 



The striking resemblance of this plant to the figure and lan- 

 guage of Schk. is obvious. The difference also between it and 

 C. Hitchcockiana is manifest. It is not at all pubescent, and the 



H 



much 



._ n — — I „_ _ u , 



fid more conic rostrate, more terete at both ends, 

 and when its beak is recurved the form is wholly different from 

 this, and its scale and mucronate point long as the fruit. A 

 sight of the two dissipates all notions of their identity or very 

 close resemblance, though one form of it has been thus misplaced. 

 But C. oligocarpa, Muh. ? is not this plant. That was describ- 

 ed Vol. x, p/280, on the authority of Muh. as the C\ oligocarpa, 

 Schk., and which has for some years been known as C digitalis, 

 Willd., and its var. C Van Vleckii, and of which C digitalis, 

 Muh. , is probably only a peculiar form. The description of Muh. 

 does not accord with C. oligocarpa, Schk. The mistake about 

 C. oligocarpa, Schk., the source of much difficulty in relation to 

 some others, is now rectified. 



Art. XXYIIL— On the Action of Sulphuretted Hydrogen upon 



Nitric Acetene ; by T. S. Hunt. 



In my communication of May 29th * on the relations between 

 glycocoll and alkargene, I stated that nitric acetene (the hypo- 

 nitrite of oxyd of ethyle of Liebig) is decomposed by sulphuret- 

 ted hydrogen with the separation of sulphur, and suggested that 

 from analogy we might expect the formation of a new alkaloid, 

 which from the known tendency in bodies of the acetic series to 

 polymorphosisf might be derived from the elements of two equiv- 

 alents of the ether, and possess the composition C 8 H, 2 N 2 ° s , 

 having the same relation to glycocoll that alkarsine has to alkar- 



metam 

 1st 



•»«. uijmmurpnusis ; mis includes tnose reactions which consist in m« , . , v j t b 

 tion or fixation of another substance, as the combination of the alkaloids \ 

 acids and of chlorine with certain hydrocarbons. 2d. Jpomorphosis ; this dem^ 

 such changes as are produced by the subtraction or elimination of certain elem« > > 

 thus salts of ammonia lose the elements of water and become amids, ana 

 in the same manner yield anhydrids. 3d. Polymorphosis ; this represents a 

 tiphcation or combination of two or more equivalents of a compound. I? l^nt* 

 atoms of aldehyde unite to produce a new isomeric body, and under the inn ^ 

 of ammonia, three equivalents of benzoilol coalesce to form with it, one of y 

 benzamid. 4th. Diamorphosis ; this implies a division or breaking up of- . 

 pound into simpler forms, as when an equivalent of cvanuric acid is reso 

 heat into three of cyanic acid ; or glucose under the influence of certain ww 

 into carbonic acid gas and alcohoJ. 



