AmbJe°cU,ri9P2Larm' }  Advances  in  Photographic  Procedures.  845 
this  is  very  thin,  it  is  possible  to  print  it  from  either  side,  thus 
eliminating  the  double  printing  necessary  in  some  cases  to  avoid  a 
reversal  of  the  relations  of  the  picture.  Two  German  firms  are 
now  furnishing  these  negatives  and  trial  with  one  made  by  the 
Bayer  Company  and  termed  "Plattenfort"  ("away  with  plates") 
gave  good  results.  The  opacity  of  the  paper  rendered  development 
somewhat  less  satisfactory  than  with  glass  or  film,  but  the  gelatin 
stripped  readily  when  the  plate  was  dry.  Great  care  must  be  taken 
not  to  remove  it  while  appreciably  moist  as  it  will  fold  and  adhere 
to  itself.  The  lightness,  comparative  cheapness  and  ability  to  print 
from  either  side  are  advantages,  but  the  low  cost  of  glass  and  film 
negatives  will  restrict  the  sale  of  such  of  these  products  to  countries 
in  which  such  low  prices  do  not  obtain. 
A  revival  of  stereoscopy  seems  to  be  indicated.  French  pho- 
tographers are  especially  active  in  the  matter,  and  the  current  French 
photographic  journals  abound  with  advertisements  of  stereoscopic 
cameras  some  of  which  are  very  elaborate  and  costly.  About  half  a 
century  ago  the  stereoscope  was  very  popular.  A  parlor  was  hardly 
thought  complete  without  a  box  of  views  and  a  hand  stereoscope. 
A  new  developer,  "Neol,"  has  been  lately  announced  by  a  Ger- 
man firm  and  is  now  in  the  American  market.  It  is,  of  course, 
claimed  that  this  practically  eliminates  the  question  of  exposure,  giv- 
ing equally  good  pictures  if  this  has  been  too  little,  too  much  or  all 
right.  Probably  it  has  a  wider  range  than  those  long  used,  but  such 
claims  are  often  subject  to  much  discount.  With  the  exception  of 
metol,  the  importation  of  which  is  forbidden,  the  well-known  Agfa 
products  are  now  in  full  supply  in  the  American  market. 
Considerable  attention  is  being  paid  abroad  to  modification  of 
projection  apparatus  to  produce  on  the  screen  the  appearance  of 
solidity  and  perspective  more  strongly  than  by  the  usual  methods, 
but  no  satisfactory  result  has  as  yet  been  obtained.  Jenkins,  of 
Washington,  D.  C,  the  well-known  inventor  of  cinematographic  ap^ 
paratus,  has  recently  perfected  a  machine  for  taking  pictures  at  a 
very  high  speed. 
