Gauze Gas Masks

From the national archives at Kew, we looked up the war diary of the 1/3 North Midlands Field Ambulance and it mirrored Frank's diary almost exactly.
Most of it was hand written by Col Hodder and Col Dent
The following is an excerpt from the archive:
Lt Harrison of the Unit and 10 men detailed from the sections at Neuve Eglise to make up and soak in neutralizing solution cotton waste for sewing into the gauze masks for the men in the trenches to use against asphyxiating gasses. The sewing was carried out by a party of girls in a convent in Bailleul . The construction of the masks is as follows:- a large piece of cotton waste (the size of a fist) is rolled up and soaked in a solution of hypo, carbonate of soda, glycerine & water. This is loosely sewn into a double layer of gauze 1 metre long. The part B is for covering the eyes, the ends C tie behind the head. The pad A going over the mouth