Ansfewandle Botanik. 127 



'ö 



analysis and calculated as dry rubber, (the moisture contained was 

 1 percent) 



Caoutchouc 77.6 percent. 



Resin 9.1 



Proteids 0.6 „ 



Insoluble Matter .... 12.7 



100.00 



They were valued at frum 1 s d to 1 s 3 d pr S?. but would be 

 worth about 3s Od if free from the insoluble impuriries (fine hard 

 Para rubber at same date 4 s 10 d). 



Prof. Geraides work is briefly summarized. W. G. Freeman. 



Anonymus. Cascara Sagrad a (RJiamnus Purshiana DC). (Kew 

 Bull, m 10. p. 429—432. 2 plates. 1908.) 



The drug Cascara sagrada, introduced to medicine about thirty 

 3'ears ago is obtained from the bark of Rhamnus Purshiana DC. 

 and R. californica, Eschsch. both natives of western North America. 

 These two plants are under cultivation at the Roj^al Botanic Gardens 

 Kew and are quite hard3\ 



Bark of a Kew grown tree of R. Purshiana has been tested and 

 found to be equal in active properties to the imported bark. 



In its native countr}^ one tree yields about 10 ffi of bark and as 

 the annual consumption is about 1.000.000 ö? the wild supplj^ is 

 rapidly diminishing. Cultivation of the tree on the western coasts 

 of the British Isles is suggested. R. caUjornica would not appear 

 so suitable for cultivation in the British Isles as R. Purshiana. 



W. G. Freeman. 



Anonymus. Germination Experiments with Para Rubber 

 Seed. (Agric. News, West Indies). VII. p. 394. 1908.) 



A note from Circular N^. 11. Vol. IV. of the Botanic Gardens 

 Cebion. Seeds from untapped trees of Hevea hrasiliensis are smaller, 

 have a lower percentage of germination, and somewhat worse keeping 

 qualities than seeds from tapped trees. W. G. Freeman. 



Anonymus. Landolphia Thollonii Dew^evre. (Kew Bull. N^. 10. 

 p. 458—459. 1908.) 



A description of a method evolved by Mr. Felix H. Hunicke 

 of extracting rubber from the roots of this plant. The roots are cut 

 into sections, from which the bark is removed; the woody portion 

 is discarded. The bark is ground in a "Hunicke" machine when 

 the powdered bark falls out leaving the rubber behind. 



A red-braun dye can also be obtained from the bark. Specimens 

 illustrating the process and the products have been presented to the 

 Museum of the Royal Botanic Gardens, Kew. W. G. Freeman. 



Anonymus. The Timbers of Southern Nigeria. (Kew Bull. 

 1908. p. 189—195.) 



The article contains a list of the chief timbers exported from 

 Southern Nigeria with their native names and when known the 

 botanical name of the trees 3neldings them, together with descrip- 

 tive note on the characters and uses of the woods. 



