^rtillerg fttMiMmt 
The Committee regret that the circulation of No. 12, Yol. VI. of the “ Proceedings ” has 
been unavoidably postponed, consequent on some of the diagrams to accompany one of the 
papers having only recently been received, and which now have to be lithographed. 
The paper in question having been printed off and paged, could not be withdrawn from 
the number; the delay in the non-receipt of the diagrams not having been anticipated. 
Woolwich, 
21 . 6 . * 70 . 
% ordel-, 
A. D. BURNABY, 
Capt. R.A., 
Secretary,, 
