I write to you hoping you will communicate any information my letter may contain to General Newton, as it may serve Mr. Mowbray, who I think has made a great improvement in the manufacture of Nitro-Glycerin, and as he gives it his personal attention, I have no doubt it is superior to any now used.
I was much pleased to receive the report of the blasting in California, and should interesting professional papers be published by the Bureau, let me beg you will remember
Your sincere friend,
G. Clinton Gardiner.
The experiments above narrated and conducted under the supervision of Major Gardiner, were continued, (on the removal of the Major to the Pennsylvania Central’s works at Altoona,) by F. J. Wilson, under General Superintendent Wm. A. Baldwin, and the results expected were entirely fulfilled, as will be seen by the subjoined communications:
Submarine Blasting with Nitro-glycerin; Results as Compared with Blasting Powder, in Erie Harbor, May, 1870.
Philadelphia and Erie R. R.; Pennsylvania R. R. Co., Lessee.
Office of the General Superintendent,
Erie, Penn., May 19th, ’70.
To Geo. M. Mowbray,
North Adams, Mass.,
Dear Sir: The comparative values of the two materials, Gun-Powder and Nitro-Glycerin, as to results and actual cost for blasting in the harbor at Erie, cannot be positively obtained until the dredging is finished; when this year’s operations with Nitro-Glycerin, can be compared with that of last year done with powder. The prospects thus far are so favorable, however, I regret that the use of Nitro-Glycerin was not adopted last year.