53 
the largest circumference of any one stem being about five inches. 
The latex ran quite freely, without coagulating, from transverse cuts 
on the thickest stems. 
The reaction was neutral to litmus. 
Coagulating agents did not act readily, and the whole was 
evaporated. It then was a white brittle mass, very soft when hot. 
The latex contained 42% solid matter. 
Analysis Dry. 
Rubber 25.60% 
Resin 74 - 40 % 
100 . 
The extracted rubber was a light coloured mass of little strength 
or elasticity, although not tacky. It seemed to be rubber, but if 
really such, is very poor. The resin is a pretty white substance crys- 
tallizing well from organic solvents. 
Landofphia Heudelotii. (Africa.) 
The specimen examined was a bush in the Botanical Gardens, 
growing in an inferior clay soil. Only a few feet in height with a 
diameter of about two inches on some of the branches, the basal stem 
being .larger. 
The latex ran very slowly from transverse cuts and coagulated 
rapidly. The rubber was obtained by picking the clots from the cuts, 
and was handsome and strong. The analysis of the dry rubber is : 
Rubber 89.50% 
Resin 10.50% 
100 . 
The dry rubber is of a clear light brown colour, not tacky, and 
very strong and elastic. Compared to Willughbeia rubber, it has a 
better colour, and the resin content is less. It is, therefore, a better 
rubber, as far as can be judged without vulcanization tests. 
Tabernaemontana dlchotoma. (India.) 
The specimens examined in the Botanical Gardens were trees 
about fifteen feet high, of a girth near the base of about eighteen 
inches, and were growing in a very exposed place in poor soil. 
Two of these trees were tapped on successive mornings. The 
latex ran slowly. It coagulated in a few hours in the bottle in spite 
of added formalin. On rubbing between the fingers and thumb it 
leaves them sticky as a good rubber latex should not do. 
The solid mass was extracted. The figures on the dry weight are : 
Gutta 25.95% 
Resin 74 - 05 % 
100, 
