te.

A recess should be made, high up in the parapet if possible, for
storing ammunition and guns. A blanket curtain, moistened with water
or sprayer solution, will greatly assist in keeping the gas out.

(2) HAND AND RIFLE GRENADES:

Unboxed grenades should be kept covered as far as possible. All safety
pins and working parts, especially those made of brass, should be kept
oiled to prevent their setting from corrosion by the gas.

(3) LIGHT TRENCH MORTARS AND THEIR AMMUNITION:

As far as the supply of oil permits, the bore and all bright parts of
light trench mortars and their spare parts should be kept permanently
oiled. When not in use, mortars should be covered with sacking or
similar material.

Unboxed ammunition should be kept covered as far as possible and the
bright parts oiled immediately after arrival. Ammunition which has
been in store for some time should be used up first.

Sentries must be prepared to give the alarm on the first appearance of
gas, as a few seconds delay may involve very serious consequences.
Signals must be passed along by all sentries as soon as heard.

The earliest warning of a gas attack is given:

(a) By the noise of the gas escaping from the cylinders.
(b) By the appearance of a cloud of any color over the enemy's
trenches. If the attack takes place at night, the cloud will
not be visible from a distance.
(c) By the smell of the gas in listening posts.

(1) ACTION TO BE TAKEN IN THE TRENCHES ON GAS ALARM:
(a) Respirators to be put on immediately by all ranks (a
helmet, if no box respirator is available).
(b) Rouse all men in trenches, dug-outs and mine shafts, warn
officers and artillery observation posts and all employed
men.
(c) Artillery support to be called for by company commanders by
means of prearranged signals.
(d) Warn battalion headquarters and troops in rear.
(e) All ranks stand to arms in the front trenches and elsewhere
where the tactical situation demands.
(f) Blanket curtains at entrances to protected shelters to be
let down and carefully fixed.
(g) Movement to cease except where necessary.

(2) ACTION TO BE TAKEN IN BILLETS AND BACK AREAS:
(a) All men in cellars or houses to be roused.
(b) The blanket curtains of protected collars, etc., to be let
down and fixed in position.
(c) Box