Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 149
his own weapon ; and so we interest in its perfection. The Austrians became case-hardened from the example of our foemen, and their exertions did have invented a projectile which, being propelled by compressed air -working more towards the advancement of this branch of military art with us than we… … upon a diaphragm of india-rubber, which Royal Navy, has been adopted by the will be compressed or expanded accord- Russians, and is considered of great ing to the depth of immersion. This utility in the British navy. This is a action is utilized, so that the rudder can wooden casing strengthened…
Engineering
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