( 560 ) 



equation found, A\liich deviatos from Amagat's observations at higher 



densities , does not de\ia(o IVoiii llic oUscrxatioiis a( smaller 



500 



1 

 densities hv more than —r^ . 



o 00 



The lull(t\viii,U' lenii in the series of K \mk,IxM,in(;!I Onnks woidd be 

 — ^. 11" we derive a \abie of /> i I'rom the (hita ,ui\(Mi in ( 'omm. N".7 1 , 



Tiicse l*r(.('. IV Jtine 21). IHOl, p. I.Ti, for h.vch-ouen at ()'( \. 1 5\4( \, 

 99°. 25 (\ an<l 21)0.25 (\, we iiiid liiat this term for J,i = 150 

 wonhl viehl in /^'^.j.,,, :().()()( )9, so Ihal if uc omit this term at the 



hi,uli(^st pressnres an error of h'ss than — — - is made. As tliere exists 



ab-eadv some uneertainlv abont the exact shape of Ihe isothcM-mal, 

 I have omitted this term. 



The vabies /y/^^,, ealenlated thns lor the dillerent valnes of (Ia oI' 

 the table mentiojied at the beu-iniiin^- of this section, lia\(> l)een addetl 

 to this tahle loLielhei- with the valnes for /> derived from them') 



When the isolhei'inal of livdro,nen at the densities oeeuri'in.u- here 

 will be known more aeenratelv, the ])ressni'es ,uiven here will re(pnre 

 a ('oiTeetion for which the afore mentioned table may he useful. 



The teni|)eratnre of the manometer dillered at most a few tenths 

 of a de,uree from 20' ('. The temperatni-e coeflicieuts for hydroi;eu 

 at 20° ('. ai-e Ibnnd from the value of .U„ (<>iven bi ('omm. N". 71) 

 of the series of Ka.merllngh Onnks and x\ma(;at's values of Ba and 

 ('a (.uiveji in ScnALKWi.iK's Thesis for the doctorat(\ [). J 20), for the 

 lem|)eratnres 0" (\, 15°. 4 V. and 47^o (\, ohservin,": the rednction 

 mentioned to obtain the agTeement with S(I1ai,k\vi.ik"s isothermal. 



TABLE X\ II. 



1) This table lias been given in my llir.-^is |oi- the (iocloralc 



