4-20 
The  Microscope. 
{  Am.  Jour.  Pharm. 
1      Sept.,  1878. 
hot  water  or  steam,  and  to  discharge  the  chilled  water  at  bottom  a  brass 
pet-cock  is  fixed. 
The  two  iron  screws  are  32  inches  long  and  2  inches  in  diameter, 
and  of  course  pass  through  the  holes  of  both  blocks  of  timber  ;  the 
head  of  each  screw  has  an  iron  cog-wheel,  16  inches  in  diameter, 
attached  ;  into  the  cogs  of  both  wheels  a  4-inch  pinion-wheel  is  neatly 
and  firmly  fixed,  which  in  turn  is  fastened  to  a  short  shaft  having  at  its 
end  an  iron  fly  or  lever-wheel,  22  inches  in  diameter,  with  handle. 
By  the  turning  of  this  wheel  both  screws  are  evenly  and  rapidly 
turned,  without  danger  of  bending  or  breaking,  and  consequently  one 
block  drawn  surely  and  with  great  power  against  the  other,  thus 
expressing  whatever  drug  may  be  placed,  in  a  sack  of  strong  linen 
toweling,  between  the  two  blocks  of  timber. 
The  power  is  great  enough  to  express  three  ounces  of  oil  from  one 
pound  of  linseed  meal,  provided  the  castings  are  filled  with  boiling 
water,  and  without  any  great  muscular  effort  on  the  part  of  the 
operator. 
Two  saddle-shaped  poplar  boards  are  used  to  cover  the  iron  castings 
when  wanted  to  express  other  than  oily  or  fatty  preparations. 
On  account  of  simplicity  of  structure,  cheapness,  cleanliness  and 
great  power,  I  think  this  press  will  commend  itself  to  every  druggist  in 
the  land  who  takes  pride  in  his  profession  and  labors  for  the  public  good. 
With  it  he  can  produce  all  manner  of  expressed  oils,  oils  and  ointments 
by  decoction  economically  expressed,  tinctures,  fluid  extracts  and  fruit 
juices. 
In  conclusion,  I  wish  to  state  that  a  sketch  of  the  press  accom- 
panies the  description  ;  and,  furthermore,  that  no  patent  has  been 
applied  for,  and  that  any  one  is  at  liberty  to  make  use  of  my  very 
limited  experience  in  press  building  and  the  use  of  the  press  in  pharmacy. 
THE  MICROSCOPE. 
By  Hans  M.  Wilder. 
Considering  the  growing  importance  of  the  microscope  for  the  phar- 
macist (an  importance  which  dates  not  from  yesterday),  it  is  a  curious 
fact  that  in  all  the  forty-nine  volumes  of  the  "American  Journal  of 
Pharmacy"  no  mention  has  been  made  of  the  desirability,  if  not  for 
every  pharmacist,  at  least  for  every  apothecary,  of  possessing  such  an 
instrument.    Only  a  passing  notice  is  found  in  vol.  xxv  (1853),  P*  45* 
