58 
These analyses yield a formula approximating to the 
composition of common gum. 
(3) The residue is, I think, nothing more than the mixture 
of cellusose, bark, dust, &c. 
In concluding my paper I must say that I am not at all 
satisfied with my present analyses, but I thought it might be 
of some interest to some of you from the point that, although 
the varnished articles from this juice are so celebrated, yet as 
far as I am aware, this is the first analyses of the kind that 
has been heretofore attempted, and might be of some use to 
those who are interested upon this subject. 
Mr. William E. A. Axon called attention to the interest- 
ing brochure on the arbre-d-lctque, by M. Paul Ory, pub- 
lished in Paris in 1875, a copy of which he exhibited. M. 
Ory was the first to give in a European language (French) 
an accurate account of the method by which the tree was 
cultivated and the sap extracted, and his description was 
illustrated by many woodcuts from Japanese drawings. 
“ On the Bursting of the Gun on Board the Thunderer,” 
by Professor Osborne Reynolds, F.RS., Professor of En- 
gineering, Owens College, Manchester. 
In the interval which elapsed between the bursting of 
the gun and the report of the Committee much thought and 
some trouble has been expended in divining the possible 
causes which might, under one set of circumstances or 
another, have led to such a result. It now appears however 
that different as have been the various suggestions they 
all resembled each other in one particular, namely, that they 
were all wrong. 
