US Navy 24-Pounder Dahlgren Boat Howitzer at Shiloh
US Navy 24-Pounder Dahlgren Boat Howitzer Number 656 is displayed at Shiloh National Military Park. (Many thanks to James Murray for sharing these photos with us!) It was cast in 1864 by Ames. As manufactured it weighed 1305 pounds. This boat howitzer has a portion of its hammer still in place - and a something (a projectile?) lodged in the tube.
The Dahlgren Boat Howitzers of the National Civil War Naval Museum
Two US Navy Dahlgren Boat Howitzers, a 12-Pounder Smoothbore and as 12-Pounder Rifle, are displayed near the entrance of the National Civil War Naval Museum in Columbus, Georgia. The display allows visitors to note the differences between these two types.
12-Pounder Boat Howitzer of USS Pittsburg at Vicksburg
US Navy 12-Pounder Dahlgren Boat Howitzer, Heavy, Number 96 is displayed in the museum beside USS Cairo at Vicksburg. As the sign attests, the boat howitzer served aboard USS Cairo’s sister ship USS Pittsburgh. The markings on the tube show a weight of 759 pounds with 65 pounds preponderance (the howitzer is breech-heavy by this amount when placed on its carriage). It was manufactured at the Washington Navy Yard in 1862, and it was inspected and approved for service by John A. Dahlgren himself.
24-Pounder Dahlgren Boat Howitzer at Petersburg, Virginia
24-Pounder Dahlgren Boat Howitzer Number 388 is displayed at the Petersburg National Battlefield. According to the research reflected in Olmstead et al., this particular boat howitzer was aboard USS Granite City when that ship was captured by Confederate infantry and artillery at Calcasieu Pass, Louisiana. I do not know what subsequent Confederate service the howitzer saw nor what brought it to Petersburg.
The Cannons at Fort Fisher
The Second Battle of Fort Fisher was fought from January 13th - 15th, 1865. This post gives an overview of the major types of heavy cannons present in the fort and aboard the fleet. The cannons pictured include Columbiads, Brooke Rifles, Dahlgren Cannons, and Parrott Rifles.
The Dahlgren Boat Howitzers of Hanover, Massachusetts
Two US Navy 12-Pounder Bronze Dahlgren Boat Howitzers are displayed in Hanover, Massachusetts flanking an 1878 Monument "Erected by the people of Hanover in grateful memory of her sons who died in the War for the Preservation of the Union."
The Dahlgren Guns of the United States Naval Academy
Among the historic cannons preserved at the United States Naval Academy are a Dahlgren Rifle and a 12-Pounder Dahlgren Boat Howitzer. This post also looks at a Civil War era photo of heavy cannons at Annapolis.
The Dahlgrens of the Washington Navy Yard
Dahlgren’s shell gun and boat howitzer designs formed the core of US Naval armament during the American Civil War. It is fitting that three of his designs are displayed at the Washington Navy Yard: a 9-Inch Dahlgren Shell Gun, a 12-Pounder Boat Howitzer, and a 20-Pounder Bronze Rifle.
The Dahlgren Boat Howitzers of Webster, Massachusetts
Three US Navy Dahlgren Boat Howitzers are displayed at the Town Hall of Webster Massachusetts. One is a Rifled 12-Pounder Boat Howitzer. Two are smoothbore 12-Pounder Boat Howitzers.
The Cannons of Trophy Park
Norfolk Navy Yard Trophy Park in Portsmouth, Virginia displays a number of Dahlgrens and Parrott Rifles from the mid 19th Century US Navy. Some are displayed as they were manufactured. Others received modifications and conversions in the 1870s. Many thanks to Flickr user Jimmy for the permission to use these photos.
12-Pounder Dahlgren Rifled Howitzer and 6-Pounder Model 1841 at Portsmouth, Virginia
Outside the Portsmouth Naval Shipyard Museum in Portsmouth, Virginia are a Dahlgren Rifled 12-Pounder Boat Howitzer and a US Army 6-Pounder Field Gun, Model 1841.