( 417 ) 



So there i-emaiii (lie (IcIeriuiiKitioiis of the series IIT, TV and V, 

 wliieh, reduced to (he s(aii(hird (enipei'atiires, occur in (he tables 

 XII, XX and XXl. With these data the further calculations have 

 heen carried out. IMate I gives a survey of the situation of the points 



in the diagram of isodiernis; on this plate -' has been given as 



function of the density'. (7' absolute (eni|)erature). l>y 1 and 11 the 

 isotherms of 100°. 20, and 0^, which will be treated in the following 

 communication, are indicated, by the other Roman figures ascending 



with decrease of temperatnre, those to — 217°. 41. 



* 



§ 21. Individual virial coeficients. 



In the same way as has been ex})lained in § ^2 of Conim. N". 97« 

 tlie first three virial coefficients of the development into series con- 

 sidered there were calculated for every isotherm, by means of the 

 earlier and the new data. They have been j)ut together in the 

 subioined table. 



In the same way as in Comm. N°. 97^ the differences between 

 tlie observed values of />/'a ^xnd those calculated by means of the 

 found virial coefficients are put together in a table, which we subjoin. 



The second column contains the differences for the points of the 

 hydrogen thermometer (see table Xll of Comm. N". 97''), the following 

 columns refer to the series IV, V and 111 in the order given here, 

 the values being ari-anged according to the ascending densities for 

 each series. 



28* 



