Domestic disturbances Page: 68
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70. SELECTION OF PROPER CHEMICAL AGENT.
a. Tear gas. Tear gas (CN) is suitable for use against
either crowds or mobs. However, since it produces only a
temporary effect, CN does not necessarily deter determined
mobs from reforming after a short time. The CN powder,
because of its greater persistency in comparison with CN
vapor, will have a more lasting effect on a mob. The actual
bursting of this grenade is instantaneous and the intolerable
concentration of gas occupies a much greater area than the
visible cloud. Example: The visible cloud is about 20 yards in
width while the invisible cloud can double this width accord-
ing to distance from burst and wind conditions. This cloud
moves and is dissipated more or less rapidly depending on
the strength and variations of the wind. The real persistency
of this form of chemical is caused by the fact that the indi-
vidual who comes in contact with it actually inhales, gets
in his eyes, his hair and his clothing, and on his skin, the
actual CN powder. That individual will be affected for
several hours. If persistency in the air over an area is desired,
the discharge of grenades should be continued by the use of
additional grenades to maintain the concentration.
b. Adamsite. Against a determined mob, adamsite (DM)
or CN-DM will frequently be required. When used, 5 min-
utes should be allowed for the agent to produce its maximum
effect. The reaction is sufficiently violent and lasting to
ncapacitate persons for several hours after exposure, thus
permitting the military authorities to gain control over the
c. Smoke. Smoke may be used to determine the approxi-
mate velocity of the wind (par. 72) and to provide conceal-
ment for the movement of troops. Troops moving behind
or through a smoke screen can approach a building or barri-
cade close enough to throw grenades. Smoke separates mem-
bers of a mob from one another, reduces the accuracy of
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United States. War Department. Domestic disturbances, book, July 30, 1945; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc96652/m1/74/: accessed February 18, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.