410 



MEMOIK OF DANIEL TREAD WELL 



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



The we 



slightly 



of 



bore has been very slight; the vent wears 



very regularly 



and 



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 



VIZ. 



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



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: 



1st series 

 2d " 

 3d " 

 4 « 



20 rounds 

 20 " 

 10 " 

 10 " 



2 lb. powder 



3 " " 



6 " " 



1 ball 



2 « 



3 " 



7 " 



2 wads 



2 " 

 2 " 

 2 " 



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



Colonel Tal 



with which the Treadwell guns are to be 



pared. It will 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. 



Charges. 



Number of Bounds fired. 



Series. 



First, 

 Second, 

 Third, 

 Fourth, 







Wads. 





Sweden. 





Gospel Oak, 

 England. 



West Point, 



United States. 



Pounds 



Powdei 



o 



Aker. 



Stafsjo. 



Fin- 



spong. 



2 

 3 

 3 

 6 



1 



2 

 3 



7 



2 

 1 



2 



2 I 



_ 



20 



20 



7 



- 



20 

 20 



9 



_ 



20 

 20 

 10 



2 







20 



18 



20 

 19 



47 



49 



52 



38 



39 



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



and reached to the fifty-second fire, when they 



a good 



guns were found to be the strongest 

 burst, being the second fire of the 



fourth series. I think we shall have 



By th 



render you ; i 

 terms of th 



the story 



be told 



>» 



contract with the Go 



for the Treadwell six- 



pounders, it was agreed that " the weight shall not exceed 880 pounds 



be le 



than 672 pounds. They shall be proved with 



charg 



required for iron g 



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