Tullys  Powder.  229 
about  one  inch  or  a  little  more  in  diameter  by  about  as  long  or  longer, 
push  the  file  lengthwise  through  it,  not  through  the  centre  but  midways 
between  it  and  the  periphery  ;  now  get  hold  of  a  brass  wire  of  about 
one-eighth  of  an  inch  thick  and  ten  inches  long,  bend  one  end  in  a  loop 
large  enough  to  easily  hold  the  body  of  the  "  three  legs  "  but  not  wide 
enough  to  let  it  slip  through  the  other  end  is  sharpened  to  a  point. 
Pass  the  brass  wire  through  the  cork  at  right  angle  to  the  file  and  bend 
the  sharp  end  in  a  right  angle  up.  In  order  to  strengthen  the  cork, 
slip  two  broad  rubber  bands  over  the  ends,  one  above  the  wire  and  one 
below.  The  cork  can  now  be  slid  along  the  file  and  the  brass  wire 
be  shortened  or  lengthened  without  difficulty.  Put  the  body  of  the 
**  three  legs  "  in  the  loop  and  the  pocket-lens  on  the  point  (most  of  the 
new  style  pocket-lenses  are  provided  with  a  hole  somewhere  through 
the  handle).  For  use,  push  the  cork  down  or  up  till  the  magnifier  you 
use  is  focused  on  the  object.  The  "  detector  "  is  easier  to  work  with, 
owing  to  its  large  field,  but  as  it  seldom  magnifies  more  than  three 
diameters,  recourse  must  sometimes  be  had  to  the  pocket  lens,  the  mag- 
nifying of  which  varies  from  five  to  about  fifteen  times,  according  to  size 
and  number  of  lenses.  Further,  get  hold  of  two  sewing  needles,  insert 
one  head  down  into  a  wooden  penholder,  the  other  point  down.  The 
latter  with  the  blunt  end  serves  to  keep  the  object  steady,  while  with 
the  first  one  the  tearing  and  separating  is  done. 
Easier  still  :  find  a  crack  in  the  table  or  counter,  stick  into  it  a  match 
and  having  on  the  match  the  above-mentined  pocket-magnifier.  A 
match  is  generally  about  large  enough  to  pass,  with  some  friction, 
through  the  hole  in  the  magnifier,  so  that  the  latter  can  easily  be  kept 
at  any  desired  height  above  the  table. 
The  above  is  nothing  new,  but  only  an  improvement  of  a  stand 
described  in  nearly  all  books  on  the  use  of  the  microscope. 
TULLY  S  POWDER. 
New  Haven,  Ct.,  April  9th,  1879- 
Editor  Journal  of  Pharmacy : 
Noticing  in  your  "Journal"  for  this  month  several  formulas  ror 
Tully's  Dover  Powder,  and  having  prepared  it  many  years  for  Prof, 
Wm.  Tully,  for  his  own  use  and  for  his  prescriptions,  I  herewith  send 
the  formula,  which  you  will  see  agrees  with  neither  of  those  published. 
Aro  Jour.  Pharm 
May,  1879. 
