﻿362 
  OF 
  SASSARUBRIN. 
  

  

  bassic 
  affinity 
  for 
  the 
  acid, 
  to 
  which 
  it 
  owes 
  its 
  birth. 
  The 
  ethereal 
  

   and 
  alcoholic 
  solutions 
  of 
  sassarubrin 
  are 
  of 
  the 
  colour 
  of 
  a 
  dingy 
  white 
  

   wine, 
  but 
  acquire 
  a 
  deep 
  crimson 
  when 
  mingled 
  with 
  concentrated 
  

   sulphuric 
  acid. 
  

  

  Sassarubrin 
  may 
  be 
  produced 
  by 
  the 
  union 
  of 
  the 
  acid 
  and 
  oil, 
  pro- 
  

   vided 
  it 
  be 
  moderated 
  by 
  refrigeration 
  or 
  dilution 
  with 
  water. 
  

  

  Without 
  some 
  precaution, 
  the 
  heat 
  produced 
  is 
  sufficient 
  to 
  char 
  the 
  

   resin 
  more 
  or 
  less. 
  The 
  reddening 
  influence 
  of 
  the 
  oils 
  of 
  cinnamon 
  

   and 
  cloves 
  is 
  due 
  to 
  the 
  generation 
  of 
  resins 
  analogous 
  to 
  sassarubrin. 
  

  

  To 
  those 
  resins 
  the 
  names 
  of 
  cinnarubrin 
  and 
  clovorubrin 
  may 
  be 
  

   severally 
  assigned. 
  Cinnarubrin 
  may 
  be 
  evolved 
  by 
  adding 
  oil 
  of 
  cin- 
  

   namon 
  to 
  equal 
  parts 
  of 
  sulphuric 
  acid 
  and 
  water, 
  previously 
  mixed 
  

   and 
  refrigerated, 
  the 
  temperature 
  being 
  subsequently 
  elevated 
  till 
  the 
  

   mass 
  rises 
  up 
  in 
  a 
  foam 
  ; 
  when 
  the 
  whole 
  should 
  be 
  poured 
  into 
  a 
  

   solution 
  of 
  pearlash, 
  from 
  which 
  the 
  resin 
  may 
  be 
  extricated 
  by 
  a 
  

   strainer. 
  It 
  is 
  analogous 
  to 
  sassarubrin, 
  but 
  is 
  less 
  efficacious 
  in 
  colour- 
  

   ing 
  sulphuric 
  acid, 
  and 
  does 
  not, 
  like 
  the 
  former, 
  impart 
  to 
  the 
  sides 
  

   of 
  the 
  containing 
  glass 
  a 
  rich 
  red 
  colour. 
  Moreover, 
  it 
  appears 
  to 
  be 
  

   partially 
  insoluble 
  in 
  alcohol, 
  and 
  to 
  retain 
  sulphuric 
  acid 
  after 
  being 
  

   boiled 
  with 
  an 
  alkaline 
  solution. 
  

  

  I 
  infer 
  that 
  a 
  new 
  series 
  of 
  resins 
  may 
  be 
  evolved 
  from 
  the 
  essential 
  

   oils 
  by 
  their 
  reaction 
  with 
  sulphuric 
  acid; 
  which, 
  having 
  a 
  general 
  

   analogy 
  to 
  each 
  other, 
  may 
  still 
  have 
  discriminating 
  characteristics, 
  

   arising 
  from 
  the 
  oils 
  whence 
  they 
  may 
  be 
  derived. 
  

  

  