106 SHORT NOTES AND QUERIES. 
with petroleum. Dr. Bernays also states that the specimen of the caout- 
chouc he analysed looked exactly like the caoutchouc found at Castleton, 
rby * That the substance is of mineral origin and not vegetable is, 
SHORT NOTES AND QUERIES. 
a remarkable Willow, * found very sparingly at Rothbury, 
870. It bears the name “S. Pon 
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nes,” and 
being oval or oval-la 
* Since writing the above, however, I : 
"ag , I am informed by Mr. Andrew Murray 
epe ceat Mi like the Castleton elaterite. He knows that subetanot 
analyses of elaterite by J, nt india-rubber. The average of 97i 
p- 631, gives for the erga rone s Brooke and Miller's * Mineralogy, 
Hydrogen 12-63 
