M. Heintz on some Experiments with Chloroform, 397 



the jet ; but once having left the orifice and acquired its trans- 

 latory motion, the liquid is left to the free action of its molecular 

 forces, whether the same be more or less energetic than gravity j 

 just as the hands of a walch continue to be moved by internal 

 mechanism, whilst it itself is transported from one place to an- 

 other. Maus, indeed, himself admits this when, in another 

 place, speaking of the acceleration of velocity as a cause of rup- 

 ture, he says, '^ and when this action has been prolonged suffi- 

 ciently to divide the liquid mass, molecular forces intervene in' 

 order to give to the isolated masses the spherical form which 

 the drops possess." . 



The contraction of the jet plays an important part in the theory 

 of Maus ; but in mine, the simple consequence of this phseno- 

 menon of contraction is, that I have not to consider the action 

 of molecular forces except from the transverse section of the jet 

 where this contraction ends, for it is only beyond this point that 

 the jet assumes its elongated form. 



With respect to the inversions which manifest themselves in 

 jets issuing from non-circular orifices, I may remark that they 

 have nothing in common with the expansions and contractions 

 which precede the separation into isolated masses ; for the latter 

 are carried with the translation of the liquid, whereas the inver- 

 sions occupy fixed positions in the limpid portion of the jet. 

 . aPurther, Maus will find, on referring to that part of Magnuses 

 memoir which treats of the influence of orifices of difi'erent shapes, 

 that it is precisely by causing the intervention of molecular forces 

 that the author has completely succeeded in explaining these 

 inversions. 



I cannot conclude without acknowledging the merit of Mag- 

 nuses research as a whole. As already remarked, the passages 

 to which I have objected form but a small part of the whole; the 

 rest appears to me very remarkable^^ weli^iaiHaitiiearetic as in 

 an experimental point of view, rod// iaf 3if1 nofrn '^rfftnf? 



doidv/- o*iSSSy W*^ Chemical Notices from Foreign Journals, 



srnwrM^^-'.Mi^'i'M.o'K.^ -^2^ E. Atkinson, P^.Z>. .;. , 



[Continued from p. 196.] bni>HwV'>^\'^V;^ ^ " 



HEINTZ* communicates the particulars 'of some experiments 

 with chloroform. They mostly affbrded negative results, 

 but possess nevertheless a considerable degree of interest. 



In the expectation of producing formyle, C^H, he enclosed 

 sodium along with chloroform in a sealed tube and exposed it to 

 a high temperature. But no action was observed, although the 



' • u ■': -■ MI ,* Poggendorff' s Annalen, June. 



