ArSii°cUh'  i92irm" }    Urethanes  of  Thymol  and  Carvacrol.  207 
successors  to  Smith  &  Hodgson,  who  established  themselves  as 
druggists  at  the  corner  of  Sixth  and  Arch  Streets  in  1819,  where 
they  continued  until  1849,  when  they  disposed  of  their  drug  busi- 
ness to  two  of  their  employees,  who  then  formed  the  firm  of  Bul- 
lock &  Crenshaw.  This  firm  carried  on  not  only  a  wholesale  drug 
business  but  handled  fine  chemicals  and  chemical  apparatus,  supply- 
ing many  colleges  and  schools  throughout  the  country.  In  Septem- 
ber, 1868,  they  moved  to  528  Arch  Street,  where  in  larger  quarters 
they  carried  on  a  flourishing  business  until  the  death  of  Mr.  Chas. 
Bullock,  the  surviving  partner. 
The  firm  of  French,  Richards  &  Co.  was  for  many  years  one  of 
the  best  known  of  Philadelphia  drug  firms  at  its  centrally  located 
store,  Tenth  and  Market  Streets.  The  founder  of  this  firm  was 
Clayton  French,  who,  in  1840,  entered  the  drug  business  as  an 
apprentice  with  Dr.  Edward  S.  Wilcox.  This  firm  was  disbanded 
in  1890  on  the  death  of  its  founder,  but  in  the  meantime  its  exten- 
sive cement  and  plaster  department,  which  was  started  in  1852  at 
Callowhill  Street  and  York  Avenue,  had  been  erected  in  1883,  into 
a  separate  business  under  the  name  of  Samuel  H.  French  &  Co. 
This  has  since  developed  into  a  very  extensive  cement,  plaster  and 
dry  color  firm,  now  under  the  leadership  of  Howard  B.  French,  a 
son  of  Samuel  H.  French  of  the  original  French,  Richards  &  Co. 
firm. 
URETHANES  OF  THYMOL  AND  CARVACROL. 
By  D.  C.  L.  Sherk. 
METALLIC  DERIVATIVES  OF  NITROSOPHENOLS. 
By  Brandel's  18  modification  of  the  method  of  preparing  nitroso- 
carvacrol  and  nitrosothymol,  it  is  possible  to  obtain  these  derivatives 
in  95  and  96  per  cent,  of  the  theoretical  yield,  respectively. 
The  only  derivative  previously  characterized  definitely  was  the 
silver  compound  of  nitrosothymol.  Schift 19  also  obtained  the  "al- 
kaliphenolates"  in  the  form  of  long  dark  yellow  needles  when  a 
solution  of  nitrosothymol  in  potassium  or  sodium  hydroxide  was 
allowed  to  evaporate  slowly  in  a  partial  vacuum.  Even  the  carbon 
dioxide  of  the  air  decomposed  them.    They  were  not  characterized 
u  Kremers  and  Brandel,  Pharm.  Rev.,  22  (1904),  p.  250. 
19  Schiff,  Ber.,  8  (1875),  P-  1500. 
