Updated 21 April 2008

Deck and Internal arrangements of Vesuvius showing the Pneumatic Guns and Air Tanks
U.S. Naval Historical Center Vesuvius DANFS Photograph, I.D. # unknown or not assigned

Simplified internal diagram of submarine Holland showing the two pneumatic dynamite guns.  The aft gun was later removed.
This sketch was originally published in "Scientific American", Volume 45, January - June 1898
U.S. Naval Historical Center Photograph NH # 53474

Submarine Holland firing her bow "Dynamite Gun" in 1898 with the projectile visible in the upper right corner
U.S. Naval Historical Center Photograph NH # 63089

Pneumatic gun on Brazilian Nictheroy
Title on print:  Canhao de dynamite do Nitheroy (sic)
Detroit Publishing Company Collection Photograph
Library of Congress Photograph ID LC-D4-21236

An early Zalinsky Coast Artillery Gun
Detail from "La Nature" Magazine Illustration, as shown on-line at Le Conservatoire numérique des Arts & Métiers Website

15" (38.1 cm) Projectile as carried by Vesuvius
Image from Scientific American, Vol. LIX, No. 18 (New York:  Munn & Co., November 3, 1888), page 271
Use here courtesy of Spanish-American War Centennial Website