122  Approved  Proprietary  Preparations.     { Ami^ch,  i9o:.rm 
or  in  the  form  of  oily  or  alcoholic  solutions  (10  per  cent.).  Manu- 
factured by  Farbenfabriken,  vorm.  Friedr.  Bayer  &  Co.,  Elberfeld, 
Germany  (Continental  Color  and  Chemical  Co.,  New  York. 
ERYTHROL  TETRANITRATE. 
Erythroltetranitrate,^C4H6  (N03)4  =  C4H6012N4,  the  tetranitrate  of 
erythrite  or  butane-tetrol,  C4H6(OH)4. 
Actions  and  Uses. — It  is  a  vasodilator  and  antispasmodic,  like 
nitroglycerin.  Its  action  is  slower  and  more  lasting  ;  it  begins  in  15 
minutes  and  persists  for  three  or  four  hours.  It  is  recommended  in 
angina  pectoris  and  cardiac  diseases.  It  is  reported  as  especially 
useful  as  a  prophylactic  in  preventing  anginal  pain.  Dosage. — 
Because  of  its  explosiveness  it  is  marketed  in  the  form  of  tablets, 
each  containing  0.03  gramme  (y2  grain).  One  or  two  tablets  every 
four  to  six  hours.  Manufactured  by  E.  Merck,  Darmstadt  (Merck 
&  Co.,  New  York). 
ETHYLENEDI  AMINE. 
Ethylenediamine,  C2H4  (NH2)2,  a  substitution  compound  of  ethy- 
lene and  ammonia. 
Actions  and  Uses. — It  is  said  to  be  non-corrosive.  It  is  recom. 
mended  as  an  albumin  solvent  for  the  solution  of  false  membranes  in 
diphtheria  and  similar  affections  of  the  mucous  membranes.  It  is 
recommended  for  use  in  the  form  of  kresamine  (which  see).  Manu- 
factured by  Chemische  Fabrik  auf  Actien,  vorm.  E.  Schering,  Ber- 
lin (Schering  &  Glatz,  New  York). 
EUCAINE. 
The  "  Eucaines  "  are  two  closely  allied  synthetic  bases,  which  were 
originally  differentiated  as  eucaine  "  A  "  and  eucaine  "  B,"  but  are  now 
designated  as  "  Alpha-  eucaine  "  and  "  Beta-eucaine,"  respectively, 
alpha-eucaine  being  a  synthetic  derivative  of  triacetonamine,  while 
beta-eucaine  is  a  synthetic  derivative  of  vinyl- diacetonekalmine. 
Both  of  these  bases  are  supplied  as  hydrochlorides  and  are  recom- 
mended as  substitutes  for  cocaine,  over  which  they  are  claimed  to 
have  certain  advantages.  They  are  described  under  alpha-eucaine 
hydrochloride  and  beta-eucaine  hydrochloride. 
(  To  be  conti?iued.) 
