"262 J. SAKÜEAI; 



these corrections being obtained by multiplying the specific conduc- 

 tivity of water, as above determined, into the molecular volume of the 

 respective solutions, expressed in c.c. No account was taken of these 

 corrections in the case of the molecular conductivity of amidosulphonic 

 acid, inasmuch as the latter is of a very considerable magnitude when 

 compared with these ; moreover, it is difficult to know whether the 

 impurities in water increase or diminish the conductivity of the acid. 

 In the case of the sodium salt, the above corrections were duly 

 deducted from the measured conductivity. 



Molecular conductivity of amidosulphonic acid, NH 2 SO d H= 



97.11. A -30 N solution of the pure acid having been made by dissolv- 

 ing 0.1517 gr. in 50 c.c, 20 c.c. of it were transferred to the resistance 

 vessel and, when a constant temperature of 25° had been attained, a 

 set of conductivity observations was carried out, with changes of 

 resistance, as already stated. Then, 10 c.c. of the solution were removed 

 from the vessel and replaced by water, and another set of determinations 

 made, and so on, until the strength of the solution was reduced to 



1 

 1024 



N. The results are tabulated below, in which v is the molecular 



volume of the solution in liters, and r and R have the same meaning 

 as before. 



32 



64 



Mean 77.04 



