Search Our Collections
An important part in the production of the 25 pounder gun is the hardening and tempering process. After machining, the gun barrel is heated to a specified temperature for hardening in a vertical electric furnace. It is then withdrawn and lowered into...
A 25 pounder field gun barrel is 'lapped' on a machine at this factory, somewhere in Britain. Before the 'rifled' grooves are cut into the barrel, it must be perfectly smooth. This smoothing is done through the process known as...
The completely fitted 25 pounder gun is tested for accuracy, both horizontally and vertically, on a specially fixed target at the end of the workshop. Factory worker Mr Redfern checks and tests the sights of the gun.
Factory worker Amy Dale works at an 'electrolimit gauge' to measure a fulcrum pin at a factory producing 25 pounder field guns, somewhere in Britain. The pins will be discarded if they are as much as 1/5,000" out. The parts of the 25...
A huge electromagnet swoops down to collect piles of scrap steel and pig iron and load it into a waiting truck at this factory, somewhere in Britain. Three factory workers oversee the proceedings. This material is then melted down to form steel ingots...
Sixty tons of molten steel are ready to be poured into ingot moulds at a factory producing 25 pounder field guns, somewhere in Britain. The moulds are about 6ft high and 24 inches square at the base. They taper near the bottom so that the solid ingot...
Men at work in the production of a 25 pounder gun at a factory, somewhere in Britain. Once the steel ingot is the right temperature, it is seized by a gang of workers and swung into position under a drop hammer. Four men hold a long pole at the end of...
A view of workers, including Seth Smith (foreground) drilling the 'trails' of the 25 pounder gun before they are rivetted. The 'trail' is the bed of the foundation on which the gun itself stands. The trail must be very strong and...
Four female factory workers put the finishing touches to a 25 pounder gun at this factory, somewhere in Britain. Dorothy Stubbs checks over the recuperator, whilst Florence Bradley sets the sights.
Florence Bradley (21), Mr Redfern, and Dorothy Stubbs (19) at work on recuperators in this factory producing 25 pounder field guns. The recuperator is a mechanism which takes the recoil when a shell is discharged. It has three chambers which are...