546 
Third  Annual  Exposition 
|  Am.  Jour.  Pharm. 
November,  19 17. 
less  Specialty  Co.,  both  of  which  concerns  have  now  adapted  the 
centrifugal  separating  principle  to  the  clarifying  and  filtering  of  oils 
with  marked  success. 
Filter  presses  and  filtering  media  (of  silica,  etc.)  were  also 
shown  in  very  great  variety  by  the  United  Filters  Corporation,  the 
General  Filtration  Co.,  Inc.,  the  Industrial  Filtration  Corporation, 
the  Celite  Co.  and  others.  Fused  silica  or  quartzware  for  the 
laboratory  and  factory  were  shown  in  great  variety  by  the  Hanovia 
Chemical  &  Manufacturing  Co.  and  the  Sidio  Co.  of  America. 
One  of  the  most  interesting  exhibits  and  one  which  points  out 
the  way  for  great  industrial  results  was  that  of  the  Research  Cor- 
poration, which  has  the  applications  of  the  Cottrell  electrical  pre- 
cipitation in  hand.  This  process  has  already  been  applied  very  ex- 
tensively by  the  great  smelter  plants  to  collect  and  recover  values 
from  their  fumes.  The  most  recent  application  is  by  cement  works 
and  iron  blast  furnaces  for  the  recovery  of  the  potash  salts  hereto- 
fore lost  with  their  waste  gases. 
The  United  States  Smelting  Co.  had  an  interesting  exhibit 
from  their  Perth  Amboy  plant,  and  showed  among  other  things  gold, 
platinum,  palladium,  selenium  and  tellurium  recovered  from  the 
anode  slimes  of  the  electrolytic  copper  production.  Both  the  vitreous, 
the  amorphous  and  the  crystalline  varieties  of  selenium  were  shown, 
the  first  named  in  large  blocks  of  a  beautiful  luster.  Tellurium 
was  shown  in  large  masses  of  a  crystalline  structure  resembling 
antimony. 
The  Foote  Mineral  Co.,  Inc.,  of  Philadelphia,  had  a  very  inter- 
esting and  striking  exhibit  of  rare  minerals  and  the  products  ex- 
tracted therefrom.  Many  of  these  have  been  hitherto  considered 
as  of  great  rarity  and  are  now  for  the  first  time  shown  in  quantity. 
The  Takamine  Laboratory,  Inc.,  showed  a  new  product  of  great 
interest  to  the  textile  trade.  It  is  called  "  Polyzime  "  and  is  a  new, 
powerful,  enzymic  product  of  Japanese  origin.  It  is  said  to  be 
strongly  diastatic,  as  it  solubilizes,  dextrinizes  and  saccharifies 
starches;  it  is  proteoclastic,  as  it  digests  or  reduces  various  protein 
matters  such  as  gluten,  sericin  in  silk,  pectin,  milk,  etc.  It  is  spe- 
cially prepared  for  de-gumming  and  de-sizing  purposes  in  the  tex- 
tile trade. 
Very  instructive  exhibits  of  a  specially  pharmaceutical  character 
were  also  shown  by  Merck  &  Co.,  E.  R.  Squibb  &  Sons,  and  the 
Monsanto  Chemical  Co. 
