PART 1. 



DESCRIPTION OF VESSELS AND BOATS OF NORTH AMERICA. 

 GOVERNMEXT VESSELS OF THE UNITED STATES. 



Block model of double-turreted monitor. 



The United States double-turreted monitor Miantonomoh was built 

 from this model by John Roach & Sons at Chester, Pa., and was 

 launched on December 5, 1876. Subsequently she underwent exten- 

 sive alterations, and was completed at the New York Navy Yard. 

 Went into commission on October 27, 1891. 



An iron, compound armored, double-turret warship, of the im- 

 proved monitor type; long, convexly sharp bow; low floor; easy 

 bilge; moderately long gunwale; two turrets, each with two 10-inch 

 breach-loading rifles ; conning tower, etc. 



Dimensions of vessel. — Length between perpendiculars, 251 feet; 

 on water line, 259 feet 6 inches; beam, extreme (over armor), 58 feet 

 10 inches; draft of water, 14 feet; tonnage, 1,276; displacement, 3,990 

 tons; side armor, compound, 5 inches and 7 inches thick; thickness 

 of plates on the two turrets, 11^ inches. Armament: Four 10-inch 

 breech-loading rifles ; two 6-pounder rapid-fire guns ; twa 3-pounder 

 rapid-fire guns ; and two 1-pounder rapid-fire guns. Indicated horse- 

 power, 1,600; speed, 10^ knots; coal capacity, 300 tons. Scale of 

 model, one-third inch equals 1 foot. 



This vessel, like all the monitor type, has very little free board ; in 

 action offering a small target for an enemy's projectiles. She was 

 intended for a coast-defense vessel only, therefore speed and coal en- 

 durance are secondary to offensive and defensive power. Her light 

 draft would enable her to choose a position where she could not be 

 closely approached by the hea\'y-draft armored vessels of an enemy. 

 At the time she was designed she was one of the most powerful war- 

 ships in the world. But the rapid improvement in building naval 

 ships rendered changes necessary, hence the delay in her completion. 



Deposited by John Roach & Sons. Cat. No. 160,137 U.S.N.M. 



Block model of launch. 



The steam launch that was used by Commander W. B. Cushing, 

 United States Navy, to blow up the Confederate ram AJhemarle 

 was built from this model. It was designed by D. J. Lawlor, of 

 Chelsea, Mass., in 1862. 



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