Am.  Jour.  Pharm. 
Dec,  1891. 
New  Tablet  Machine. 
575 
portions  that  he  may  wish,  than  to  supply  a  product  containing  a 
very  indefinite  quantity  of  free  salicylic  acid.  A  process  for  prepar- 
ing bismuth  salicylate  was  described  in  the  August  number  of  the 
"Journal,"  page  401. 
A  NEW  TABLET  MACHINE. 
By  J.  R.  Witzel,  M.  D. 
Read  at  the  Pharmaceutical  Meeting  of  the  Philadelphia  College  of  Pharmacy,  Nov.  17. 
Realizing  the  great  demand  for  compressed  tablets,  the  writer 
has  endeavored  to  bring  before  the  profession  a  tablet-compressing 
machine  that  is  simple,  powerful,  compact  and,  as  nearly  as  possible, 
perfect  in  every  respect.  The  accompanying  cut  shows  the  appear- 
ance of  the  machine,  the  motions  of  which  are  positive  and  auto- 
matic. 
The  frame  is  one  solid  casting ;  the  hand  machine  weighs  about 
125  pounds,  occupies  a  counter  space  of  10  x  17  inches  and  stands 
9^  inches  high;  power  machines  have  an  additional  stand  to  give 
clearance  for  the  large  fly  wheel.  The  capacity  is  from  55  to  95 
tablets  per  minute,  and  is  increased  in  proportion  to  the  number  of 
plungers  in  operation.  The  pressure  can  be  regulated  to  any 
desired  degree,  is  direct  and  comes  to  bear  between  the  cams  which 
impart  the  desired  motions  to  the  sliding  blocks.     The  steel 
