187 
occasion to 2s. 9d.), , ana in iyoy ^ h . , The d | agam (P. 390). 
nary fluctuations during ihe pu*' ^ ree y chsd | ts highest 
record highest price was 5 s - 9 d - P er 1D - m ^ f , i f 
for five years, including I909> works- out at 5s. 4 •> * 
iui ii j , , _iv, On the other hand plantation rara rose 
at ^ , _ - j fnr forward delivery. It must also be pointed out that 
larg^contracts now have been entered into for plantation rubber for 
forward deHvery to the end of 1910 and 1911 at prices up to about 8s 
rolTon these°“ C forw > art’’ saleTof pUnlLL'fubber' will constitute a 
large proportion of the business. 
( The Chemist and Druggist , March I2th 1910.) 
MORE RUBBER PRODUCING PLANTS. 
Dr. P. Olson Seffer in the Journal d’ Agriculture Tropicale des- 
cribes some more plants from South America, from which he has 
obtained rubber. Among these there are the well known Frangi- 
panni trees which are so largely planted in native graver - 
^Plumeria rubra (the red flowered one), P. mexicana and P. acutifolia the 
common white one. The latex containing 14 to 16 per cent, of rubber 
isgoTby tapping but the best way of dealing with them » to cut off 
the young branches and crush and macerate them. Mr. Seffer got 
1 pound 3 ounces of rubber from one tree, but this he thinks may be 
exceptional. 
Another plant known as “Chupire” in Mexico is Euphorbia 
cahculata a large shrub giving an excellent quality of rubber^ 
The latex contains 21 per cent, of rubber, and is obtained by tapping 
young branches. 
An undescribed Jatropha and Pedilanthus lomcnlellus a low 
shrub,* are two more. 
The latter is allied to a plant very common in gardens here 
formerly used to make low hedges. It is too small to tap and has to 
be treated chemically like guayule. 
