47 
; e co ; 
solution of the resin is stained beautifully light-blue (on an opal 
plate or china plate) by ferric chloride, a reaction which it shares with 
_ ‘$lajac resin. Permanganate of potash is only reduced to a brown 
mr by tacamahac solution, whereas guajac solution is stained 
Jeow ; diluted nitric acid produces only a green colouration. 
If the alcoholic solution be put.on the just broken surface ofa 
a 
~jmiper ge Zetetion to the oil of 
: Iuniper berries, s show that this oil comes nearest 
| ui i colour reaction of tacamahac resin with ferric chloride 
u to the conclusion that it contains a tannate, it or be 
e 
! solution the inop 
he resin. 
» ywede gay Se : i i 1 
Ved ys that the resin is emetic and purgative. It is mostly 
fon Fcmaally for plasters, like turpentine. It has found its way 
‘it wag a to Europe, and was called “ tacamahaca 10 testis, because 
pes to the market in gourd-shells covered with rush-leaves. | 
. atcely to be met with in chemists’ shops, and no chemical 
