ON  BETACINCHONIA. 
419 
if  a  concentrated  alcoholic  solution  is  diluted  with  water,  and 
white,  crummj  and  radiating  crystalline  on  precipitating  a  salt 
by  a  base.  Precipitated  or  crystallized,  it  is  anhydrous,  fuses 
at  150^  C.  (302  F.j  to  a  colorless  oily  liquid,  assuming  a  crystal- 
line structure  on  cooling,  decomposes  at  a  higher  temperature, 
and  burns  with  a  sooty  flame.  It  is  insoluble  in  cold  water, 
scarcely  soluble  in  hot  water,  soluble  in  173  parts  cold  and  43 
boiling  alcohol,  in  378  parts  ether  and  268  parts  chloroform, 
and  rather  readily  in  volatile  and  fatty  oils.  Its  alcoholic 
solution  deviates  polarized  light  to  the  right. 
Potassa,  soda,  ammonia  and  their  carbonates  produce  in  the 
solution  of  its  salts  a  white  crummy  precipitate,  somewhat 
soluble  in  excess.  Acidulated  with  tartaric  acid,  it  is  not  pre- 
cipitated by  bicarbonate  of  soda. 
The  following  exhibits  the  behaviour  of  its  salts  to  reagents : — 
Terchloride  of  gold,  a  sulphur-yellow  precipitate. 
Bichloride  of  mercury,  a  white  precipitate,  becoming  resin- 
ous. 
Bichloride  of  platinum  in  concentrated  aqueous  and  in  alco- 
holic solutions,  an  orange-yellow  deposit. 
Iodide  of  potassium  in  concentrated  solution,  white  crystal- 
line soluble  in  water. 
Tincture  of  iodine  and  iodine  water,  crummy  rust  or  red- 
brown,  soluble  in  excess,  in  alcohol  and  ether. 
Tincture  of  bromine,  a  yolk-yellow  precipitate,  consisting  of 
microscopic  globules. 
Bromine  water,  no  elTect. 
Picric  and  phospho-molybdic  acid  yellow  pulverulent. 
Tannic  acid,  yellowish  white. 
Permanganate  of  potassa  is  decolorized. 
Concentrated  sulphuric  and  nitric  acids  yield  a  clear  solution, 
decomposed  on  heating. 
Mixed  with  chlorine  water,  and  afterwards  with  ammonia,  the 
solution  remains  yellow. 
Ferridcyanide  of  potassium  produces  in  the  solution  of  the 
sulphate  a  rose-red  color,  disappearing  on  the  addition  of  sul- 
phuric acid  with  the  formation  of  a  yellow  precipitate,  becoming 
crystalline. 
Ferrocyanide  of  potassium,  and  afterwards  chlorine  water, 
