INDEX. 
557 
Vogel,  Dr.,  on  a  method  of  preserving  the  coloring  matter  of  litmus   340 
Volatile  oil  of  German  chamomile   109 
Volatile  alkaloid  in  Digitalis  purpurea   126 
Volumetric  determination  of  tannic  and  gallic  acids   314 
Weights,  note  on  funnels  and   3 
Wier,  John,  on  Myroxylon  toluiferum  and  the  mode  of  preparing  balsam 
of  Tolu     449 
Wenzell,  William  T.,  an  essay  on  the  active  constituents  of  ergot  of  rye..  194 
Whitelaw,  A.  A.,  conversion  of  salt  meat  into  fresh,  a  further  application 
of  dialysis   372 
Why  bees  work  in  the  dark   319 
Wiegand,  T.  S.,  on  the  most  desirable  form  of  a  still  for  pharmaceutical 
purposes  ,   22 
Willemot,  C,  on  the  destruction  of  noxious  insects  by  means  of  pyrethrum  66 
Wincker,  M.  ft,  on  the  determination  of  water  in  organic  substances   536 
Wine  of  iron,  on  an  improved   535 
Wood  spirit  and  its  detection   152 
Wright  iana  an  alkaloid   349 
Young,  W.  J.,  the  absorbent  power  of  starch  for  coal  tar  colors   126 
Young,  Dr.  J.,  on  conia   330 
Zostera  marina,  leaves  of.   109 
