191 
“For the sample examined, we are indebted to the kindness of 
Mr. P. Gennadius, the Director of Agriculture of Cyprus. 
san 
matter was 1'5 grams, or 0°15 per cent. This was obtained as 
a lustrous mass of yellow needles, soluble in strong potassium 
hydroxide solution with a yellow coloration, which, on dilution, 
changed to a deep green. 
*From the colouring matter, by fusion with alkali, two 
products were obtained, melting respectively at 210° and 238°— 
240°. The former was found to be phloroglucinol, and the latter, 
which ve a blue-black coloration with ferric chloride, was 
evidently gallic acid. 
“The colouring matter of the leaves of Pistacia Lentiscus is, 
therefore, indentical with myricetin, which has been previously 
shown to exist in Rhus Coriaria, or Sicilian sumach, R. Cotinus, 
and Myrica Nagi. 
“Judging from the fact that an aqueous extract of shinia - 
leaves dyes calico mordanted with iron a blue-black shade, it 
appeared probable that the tannin which they contain was 
ordinary gallotannin. The deep, red-brown coloration produced 
on boiling an extract of the leaves with dilute sulphuric acid was, 
however, a property usually indicative of a catechol, rather than 
a gallotannin ; moreover, some qualitative tests which Professor 
Procter kindly carried out for us also hardly corroborated this 
ew. 
tannic acid and a new tannin or tannin glucoside 
“Tanning Properties—According to Sir Thomas Wardle 
(private communication), the shinia leaves contain 11-29 per cent. 
of tannin. Under the direction of Professor Procter, a sample of 
the material employed in the above investigation was analysed b 
the International Conference method. 
“Tannin matter ... ee ^. 113 per cent. 
* Soluble non-tannins ie ee 
“Insoluble at 60° E. — ... m UNS 
* Water se eds 81 
“ It seems that the leaves of Pistacia Lentiscus contain gallo- 
” 
” 
* 100-0 
* A good, plump leather is obtained from this material, but of 
a faintly reddish tint, the result being intermediate in character 
betw ose which are given by oak bark anc mach, 
Although evidently a useful tanning agent for dressing leather, 
it cannot be employed as a substitute for sumach, when a very 
light coloured lezther is required, but in other respects it has very 
similar properties. 
and duller character; it seem " 
would be best employed for the production of the darker tints." 
—— are 
