478 
Book  Reviews. 
<  Am.  Jour.  Pharm. 
t     October,  1914. 
The  book  is  divided  into  a  set  of  tables  arranged  according  to 
the  names  of  the  compounds,  containing  all  the  data  that  may  be 
given,  with  a  bibliography  of  all  the  references  to  each  compound ; 
a  formula  index  to  the  compounds  ;  a  bibliography  arranged  according 
to  the  names  of  authors;  a  subject  index  to  certain  subjects;  and  a 
journal  list  giving  the  names  of  all  journals  examined,  with  the 
number  and  date  of  the  last  volume  examined. 
Chemical  Reagents.  Their  Purity  and  Tests.  Authorized 
translation  of  "  Priifung  der  Chemischen  Reagenzien  auf  Reinheit  " 
(Zweite  Auflage)  von  E.  Merck.  By  Henry  Schenck,  Second  edition. 
New  York:  D.  Van  Nostrand  Company,  25  Park  Place.  1914.  $1 
net. 
This  translation  in  method  of  treatment,  closely  resembles  that  of 
the  German  work.  It  includes,  however,  numerous  articles  which 
have  come  into  prominence  since  the  earlier  work  was  published. 
Among  the  subjects  included  for  the  first  time  in  this  edition  the 
following  may  be  mentioned :  Alphanaphthylamine,  Ammonium 
Chromate,  Ammonium  Molybdate  Solution,  Ammonium  Persulphate, 
Benzidine  for  Blood  Test,  Bismuth  and  Potassium  Iodide  Solution, 
Carbon  Tetrachloride,  Carmin-Fibrin,  Chromium  Trioxide  for 
Carbon  Determination,  Cobalt  Nitrate  (Free  from  Nickel),  Cobalt 
Oxide,  Copper  Hydroxide,  Copper  Oxide-Asbestos,  Devarda's  Metal, 
Dicyandiamidine  Sulphate,  Dimethylglyoxime,  Dimethylparaphenyl- 
enediamine  Hydrochloride,  Ferric  Oxide,  Glass  Wool,  Hydrazine 
Sulphate,  Indigo  Carmin,  Indigo  Solutions,  Lead  Peroxide,  Granu- 
lated Magnesia  Mixture,  Magnesite,  Manganese  Metaphosphate  Solu- 
tion, Methyl  Red,  Platinized  Pumice  Stone,  Poirrier's  Blue  C4B, 
Potassiijm  Persulphate,  Quartz  Sand,  Sea  Sand,  Silver-Asbestos, 
Sodium-Cobaltic  Nitrate  Solution,  Tetramethylparaphenylenedia- 
mine  Hydrochloride,  Yellow  Oxide  of  Mercury. 
A  number  of  changes  have  been  made,  some  of  these  having 
materially  raised  the  standard  of  purity.  Coincident  with  this  im- 
provement is  the  inclusion  among  the  references  of  important  new 
contributions  upon  the  uses  and  methods  of  testing  reagent  chemicals. 
The  tables  of  equivalents  of  standard  solutions  have  been  replaced, 
in  response  to  a  suggestion,  by  a  table  giving  approximate  strengths 
and  brief  directions  for  the  preparation  of  solutions  for  reagent  pur- 
poses, compiled  from  published  writings.  Another  valuable  feature 
in  this  translation  is  the  parenthetical  statement  appended  to  each 
