This building which was very striking in its appearance, was never completed in its interior, as the different work to be here performed was being done at the Arsenal sufficiently well, in temporary structures. Awaiting the completion of the clock, the time was struck by hand, every half hour on the large bell suspended temporarily, in the open building in rear of the Refinery. The continual testing of the powder, as it was being manufactured to insure its equality in strength, and to ascertain its exact propelling force, was done for the fine graded powders, by excellent musket and ballistic pendulums constructed at the Confederate Machine Works in Augusta under my direction. For the cannon or large grain powders, by the initial velocities given to the proper projectiles in an eight inch Columbiad. To determine these velocities an accurately made electro-ballistic machine, such as was employed at the West Point Military Academy, was constructed at the same works. Also Rodman's apparatus for determining the absolute pressure on each square inch of the bore of the gun, exerted by the charge. In addition to these instruments, complete arrangements for determining the gravimetric densities and hygrometric properties of different samples of gunpowder were made. The foregoing appliances enabled accurate comparisons to be made at all points between different gunpowders, and to determine the various matters required in the manufacture of the first quality for the various arms of service. That this was successfully done was certified to by Boards of Artillery and Infantry Officers; after the war the captured powder of these works was used in the School of Artillery practice at Fort Monroe, on account of its superiority. Mr. Davis, whilst President of the Confederacy, visited the works, then in active operation, and in his recent valuable book, speaks in more than one place in flattering terms of their products. Articles published in the London Times were highly commendatory of the Works and their results, which were copied in Continental papers. They were visited by many distinguished civil and military gentlemen, both native and foreign. The great extent of the Powder Works and their immense capabilities, were the admiration of all visitors. This was mainly due to the foresight of the President of the Confederacy, who, comprehending the requirements of a great war, then scarcely commenced, strongly drew my attention to the probable necessity of very large supplies of gunpowder to meet the service of artillery of great calibre, which would probably be employed, as well as the largely increased quantities necessary to meet the rapid firing of the improved small arms, with which infantry and cavalry were now supplied.