Am.  Jour.  Pharm.  ( 
September,  1913.  J 
Book  Reviews. 
433 
mulas  and  directions  for  making  inks  and  writing  fluids  of  all  kinds 
and  colors.  Much  other  cognate  information  is  also  given.  Some  of 
the  subjects  treated  are :  How  to  make  ink  permanent,  to  freshen 
old  writing,  preservation  of  inks,  to  restore  faded  writing,  ink  pow- 
ders and  tablets,  invisible  and  sympathetic  inks,  ink  erasers,  blotting 
paper,  inks  for  rubber  stamps  and  hectographs,  typewriter  ribbons, 
inks  to  write  on  celluloid,  glass,  porcelain,  show  cards,  photographs, 
sacks,  wood,  steel,  tin,  zinc,  etc.,  respectively ;  sheep  marking  ink, 
shoemaker's  ink,  printing  inks,  pencils  to  write  on  glass  and  metals, 
etc.,  etc. 
E.  Merck's  Annual  Report  of  Recent  Advances  in  Phar- 
maceutical Chemistry  and  Therapeutics.  Vol.  XXV,  E. 
Merck  Chemical  Works,  Darmstadt,  191 2. 
Those  of  us  who  have  used  these  "  Annual  Reports  of  Merck  " 
have  come  to  rely  upon  them  for  the  well  digested  information  and 
succinct  summaries  they  contain  of  recent  discoveries  in  the  field  of 
pharmaco-therapy.  The  Reports  deal  not  only  with  substances 
eminating  only  from  the  Merck  Chemical  house,  but  all  the  newer 
preparations  and  drugs  that  have  a  scientific  basis  for  their  intro- 
duction into  medicine.  The  editor's  view  of  the  value  of  this  work 
is  best  shown  probably  by  the  fact  that  we  republished  in  its  en- 
tirety in  the  January  issue  of  this  Journal  the  article  on  the  "  Digi- 
talis Glucocides  and  Allied  Drugs  "  taken  from  this  volume.  This 
is  the  clearest  and  best  presentation  of  this  subject  that  we  have 
ever  seen  and  well  illustrates  the  broad  spirit  that  dominates  E. 
Merck  &  Co.  in  issuing  this  publication. 
Report  of  Lehn  and  Fink's  Analytical  Department  for 
1910-1912.    Issued  by  Lehn  and  Fink,  New  York,  January,  191 3. 
This  report  contains  a  great  deal  of  analytical  data  on  the 
examination  of  nearly  a  hundred  different  substances.  We  are 
very  fortunate  in  having  this  information  in  a  form  that  is  available 
for  reference  and  we  hope  that  it  may  be  possible  for  us  to  publish 
from  time  to  time  some  of  the  results  incorporated  in  this  volume. 
This  has  already  been  done  in  the  case  of  "  Haarlem  oil  "  in  our 
June  issue. 
Semi-Annual  Report  on  Essential  Oils,  Synthetic  Per- 
fumes, Etc.  Published  by  Schimmel  &  Co.  (Fritzsche  Brothers), 
Miltitz,  near  Leipzig,  London,  New  York,  April,  1913. 
Essential  oils  whether  viewed  from  the  scientific  or  commercial 
point  of  view  are  among  the  most  interesting  of  plant  constituents. 
