manual for commanders of infantry platoons. - US Army Combined ...

16l~ 3MANUALB~G FOR~~ COMMBl~ANDERS~,~: OF)'INf~FANTIRYr PLATODNS~il~;:
isolate the srplice from? the gTroundclby means of a ra~g;a pi~ce oif
pape~r or wood,~or a bit of oatr~dboard.. AIs soon as possi~ble this
spice ,shouldc be covered wi~th tarred taple, which xviii · irsulate -it
TAGrGINGAIND~ JICDEIIL Afn~7:lEANGEMENT OF LITNES.
A mea~ns of identifying ihes circulating in th~e same tr~nch is
very important. Care should be taken never to string .ines over
those alreaidy placed (duplication). F~urthermore. every 50
yards of each line should have a tag firmly attached to it indlicating:
the origin and end off the line. Every unused. l~ne should
be recoiled the very da~y it ceases to be of use.
nMEANS OF OBSERVA~kTION A$ND RIECO~NNAI$SANCE.
CH~APTER XI.
SAN~CE.
FIELD GrLBSSES-PEEIScoPE--COM~PASS---MAP, S~uTcHES, AND
PLANS.
1. Field glasses.--To be remembered: Field 4lasses of the
highest~ poxver are not the most advaLntag~eous -r an infantry
officer, for unless considerazble dimensions are aven teojc
glass, thus rendering the instrumient `cumberso~e, this enlargrement
is ahvays obtained at the exp~ense of f/id of viewo andn
clearnmess'. If tw~of~ield glasses have object g]hses of· the same
diameter ·and one magnifies -twice ds much Is the 'o-ther,its
cleaniuess viii -be banly one-fourth that of theweatker glass. A
magnifying pow~e~rof 6 or 7 dliamneters, a field ~f100 to 130 mils,
with correspondting clearness, gives, for the pismatic field glass,
the best balance betwe~en the conflicting quaF~les.
2. Periscope.-A periscope is or~dinarilylomposed of ·two
mirrors, Ma· 1 and M:·,
2 or twoi~reflecting pr~ips' xvhose face~,s nri~~
parallel to each1 other and inclinedl ati antng~le of 450 to: the8
tubular m~ount;.