446 



SCIENCE 



[N. S. Vol. XXXIX. No. 1004 



No. 1824 



NHsOH 

 Na03s/^,^N = 



NaOsS 

 No. 1835 



NH2OH 



/\An=n 



NaOsS! 



SOsNa 



NH2OH 



'\/^ 



OHNH2 



= Nf'^/\s03Na 

 1^ i 

 SOsNa 



SOsNa 



OHNH2 



N=N< V ^N = Nf' 

 CH3 TjHs 



SOsNa 



NaOsS. 



NaOaS SOaNa 



Furthermore, the production of exactly 

 as brilliant a result by dyes in which merely 

 the position of the OH group has remained 

 constant, the NHj group either being ab- 

 sent or shifted in its position, might lead us 

 to suppose that it is the alpha position of 

 the hydroxyl radicle rather than the entire 

 peri-amido complex which in all these cases 

 has determined the vital stain. We men- 

 tion of such dyes the vital stains 2836, 1836 

 dioxy, 1527, 136, 1368. 



No. 2836 



OH OH 



NaOsS. 

 No. 1836 



OH OH 



CH3 CHa 



•BOaNa 



'\/\/ 



SOsNa 



No. 1368 



NaOsS OH 



NaOsSl 



N=n/ ^/ ^N = N, 



CHs CHs 

 SOsNa NaOsS 



SOsNa 



This conclusion, however, {i. e., that an 

 alpha-naphtol receptor has been responsible 

 for the staining) must be rejected at once 

 as soon as we examine the dyes 184, 185, 

 257, 258, 286, 184 dioxy 14 and 15 all of 

 which can be injected into animals without 

 producing a vital stain. 



No. 184 



NH2 OH _ _ OH NH2 



./\/\m = m/ \/ \n=n/\/N 

 CH3 



NaOaS 

 No. 185 



NHaOH 



I I 

 I I 



SOsNa 

 No. 257 



OH _ 



NH2 



NH, 



SOsNa 



