This is available online here
https://onlinebooks.library.upenn.ed...armsexplosives
https://dds.crl.edu/crldelivery/28565
There are allegedly some articles on experiments with Lincoln Jefferies BSA air-rifles and stuff if someone cares to dig though all the other late 19th C & early 20th C stuff.
Here is a patent for a breech lock to give a break-barrel a rigid & air-tight lock-up ...
https://dds.crl.edu/item/286812
Last edited by Hsing-ee; 23-01-2022 at 02:44 PM.
Vintage Airguns Gallery
..Above link posted with permission from Gareth W-B
In British slang an anorak is a person who has a very strong interest in niche subjects.