Triie and Hunkel. The Poisonous Etfect Exerted etc. 323 



Table VIII. 

 Electrieal Conductivity of Resorciiiol (Bader)- 



V. ' .«V 100 K. 



8,52 0,09 0,00000082 



17,04 0,16 0,00000110 



34,08 0,30 0,00000220 



68,16 2,14 0,00005400 



fioo = 356 K = ? 



Resorcinol is seen by Bader's table (Table VIII.) to behave 

 like phenol and pyrocatechol as regards dissociation, tlie electrieal 

 conductivity being but slight. It is seen, however, to be less 

 poisonous than the ortho Compound, their respective toxic values 

 being, for pyrocatechol 1/800, for resorcinol 1/200. The latter 

 substance seemed to be more stable in Solution than pyrocatechol. 

 Probably we have in the toxic value here given, 1/200, the effect 

 of the undissociated resorcinol without any considerable increase 

 Coming from oxidation products. The stability of this Solution 

 was further rendered probable by the fact that Spirogyra fila- 

 ments were exposed for two days to a Solution containing 1 gram- 

 molecule per 200 liters and were found to be uninjured as tar as 

 appearance and capability for prompt plasmolysis were concerned. 

 It seems probable that for the alga this concentration is consi- 

 derably weaker than the limit concentration. 



This difference may possibly be explained in one of several 

 ways. The addition of a second or third negative dement or 

 group into the benzene ring is known to aflPect the capacity for 

 reaction of the first. In this case the change would be in large 

 measuro qualitative. On the other band the change may be 



quantitative, due to the addition of OH ions added in the form 

 of the sodium hydroxide. Possibly both factors come into consid- 

 eration. 



Hy droquinone, CeH* (OH) (OH) = 1:4. 



Table IX. 



Begun May 2, 4 : 00 P. M. 

 •^^Gram mol. per liter. 



1/800 



1/1600 



21" 



