THE ROYAL ARTILLERY INSTITUTION. 
91 
Short Notes on Professional Subjects . 
Report of Progress, Committee on Explosive Substances. Jan. 1, 1871. 
Explosive Compound. " Lithofracteur.” 
Hydraulic Lifting Jack. 
Tlie “ List of Service Ordnance and Ammunition 33 Las been re¬ 
arranged, to admit an additional table of tbe service fuzes, and another 
giving the velocities and energies of the projectiles of various guns at 
different ranges. 
Since the last meeting, the Committee directed that letters should be 
addressed to the Editor Osterreichische Militarische Zeitschrift, to 
the President of the Technischen & Administrativen Militar-Comite, 
and to the President of the Wissenschaftlichen Yereins, all at Vienna, 
inviting them to exchange publications with the Institution. Favour¬ 
able replies have been received to all three invitations, together with 
the current numbers of the publications issued by each respectively. 
The Committee considers these exchanges a matter for congratulation. 
Not only do the “ Proceedings 33 enjoy a more extended circulation 
among appreciative readers, but much valuable and interesting infor¬ 
mation is placed at the disposal of the Institution in the publications 
received in exchange for the cc Proceedings. - ” 
A complete set of the “ Proceedings 33 has been presented to the 
Netherlands Royal Military University at Breda, whence in return 
have been received a topographical atlas on a large scale of the Nether¬ 
lands, together with copies of the books, drawings, &c., containing the 
course of military instruction pursued at the University. 
With regard to the prize essay mentioned in last year's Report, six 
essays have been received and submitted to the referees—viz., Maj.-Gen. 
E. M. Boxer, F.R.S., Maj.-G-en. H. Clerk, F.R.S., and Colonel Wray, 
C.B., R.A. The referees having been unable to come to a satisfactory 
conclusion with regard to three of the essays, Lieut.-General F. M. 
Eardley-Wilmot, F.R.S., was elected by the Committee to act as arbi¬ 
trator, and these three essays are still in his hands, a sufficient time 
not having elapsed to allow of his forming an opinion. The motto of 
the successful essay and the name of its author must therefore appear 
in the Annual Report of the Committee for next year.* 
4. Library .—The Committee is of opinion that the thanks of the 
members of the Institution are due to Lieut. H. Geary, R.A., for the 
great care and trouble bestowed by him on a catalogue of the Library 
which he has drawn up, and which was much required. 
This catalogue is now being printed, and will soon be in the hands 
of members. 
The following is a list of presentations to the Institution during the 
year;— 
Books , Sfc.j presented. 
Proceedings of the Institution of Meehan-J f m, n T n r e 
• i -p T a -i t i jit \ The Council, institution ot 
Oct mr.. .. ! 1 ': pn .: y ’ j 1 Mechanical Engineers'. 
* The arbitrator decided in favour of the essay bearing the motto " Fortes pejoraque passi,” 
which was ascertained to have been written by Lieut. E, H, H. Collen, It. A., who therefore becomes 
medallist for the year. 
