410 



MEMOIR OF DANIEL TREADWELL. 



bore was 0.002 to 0.003 inch, as shown by the measure of the accompanying table. 

 The wear of the bore has been very sHght; the vent wears very regularly and 

 slightly, — is still serviceable, but has become angular and its greatest width is 

 about 0.4 inch." 



After this firing Colonel Talcott directed Captain Huger to try the guns of 

 Treadwell's manufacture in the manner that the Swedish guns were tested, — viz. 

 one new gun and the one that has stood the trial by Captain Huger of 1,501 rounds, 

 heretofore reported, — to be fired sixty rounds, as follows : — 



The following table gives the results of the testings of the guns referred to by 

 Colonel Talcott, with which the Treadwell gims are to be compared. It Avill be 

 observed that they are from Sweden, Belgium, England, and West Point. All burst 

 at the last fire. 



Extreme Proof of Six-pounder Iron Guns at Fort Monroe in 1841 and 1842. 

 Length of bore, 16 calibres ; weight, 840 pounds. 



Colonel Talcott, in a letter to Mr. Treadwell on this order, says : " The Finspong 

 guns were found to be the strongest, and reached to the fifty-second fire, when they 

 burst, being the second fire of the fourth series. I think we shall have a good 

 account to render you ; at all events, the story will soon be told." 



By the terms of the contract with the Government for the Treadwell six- 

 pounders, it was agreed that " the weight shall not exceed 880 pounds, nor be less 

 than 672 pounds. They shall be proved with charges required for iron guns. 



