Question: Protection to protect arm from bow string?
About the article "Archery", section "Protective equipment".

Candidate passages:
A bracer (or arm-guard) is a strap or sheath, commonly made of leather, stone, or plastic that covers the inside of an archer's arm to protect it while shooting.
Bracers protect the inside of the archer's forearm against injury by the string of the bow or the fletching of the arrow.
They also prevent loose clothing from catching the bow string.
They normally cover part of the forearm only, but chest-guards are sometimes worn, usually by female archers, and other areas have at times been protected.
With some combinations of non-baggy clothing and bows with a larger distance between the bow and the string, the archer may not need to wear any bracer. 
Most archers wear a bracer (also known as an arm-guard) to protect the inside of the bow arm from being hit by the string and prevent clothing from catching the bow string.
The bracer does not brace the arm; the word comes from the armoury term "brassard", meaning an armoured sleeve or badge.
The Navajo people have developed highly ornamented bracers as non-functional items of adornment.
Some archers (mostly women) also wear protection on their chests, called chestguards or plastrons.
The myth of the Amazons was that they had one breast removed to solve this problem.
Roger Ascham mentions one archer, presumably with an unusual shooting style, who wore a leather guard for his face.
The drawing digits are normally protected by a leather tab, glove, or thumb ring.
A simple tab of leather is commonly used, as is a skeleton glove.
Medieval Europeans probably used a complete leather glove.
Eurasiatic archers who used the thumb or Mongolian draw protected their thumbs, usually with leather according to the author of "Arab Archery", but also with special rings of various hard materials.
Many surviving Turkish and Chinese examples are works of considerable art.
Some are so highly ornamented that the users could not have used them to loose an arrow.
Possibly these were items of personal adornment, and hence value, remaining extant whilst leather had virtually no intrinsic value and would also deteriorate with time.
In traditional Japanese archery a special glove is used, provided with a ridge which is used to draw the string.
Early Bronze Age stone wrist-guards are found across Europe from around 2400-1900 BC and are closely associated with the Beaker culture and Unetice culture.
In the past they have been variously known as "stone bracers", "stone arm-guards" and "armlets", although "stone wrist-guard" is currently the favoured terminology.
The wrist-guards are small rectangles of stone (often slate) with a number of perforations, typically between two and six, which might allow attachment to the arm with cord.
One, from Hemp Knoll in Wiltshire, had markings which clearly indicate its attachment to the arm by two cords.
The shapes of the wrist-guard are stereotyped and common forms exhibit a narrowed 'waist' and curved cross-section (presumably so they fit the arm better).
Stone wrist-guards are exclusively found in the graves of males, often lying next to the corpse's wrist.
Rare examples - three in Great Britain - use rare imported greenstone and are decorated with gold-capped rivets or foil, clearly representing an elite form.
The three British examples are from burials at Driffield, Barnack and Culduthel Mains in Scotland.
It was originally thought that these stone wrist-guards were bracers, used by archers to protect their bow arms from the string of the bow.
However, recent research has highlighted that (in Britain at least) they do not commonly occur in graves in association with arrowheads (the Amesbury Archer being a notable exception) and nor are they commonly found on the part of the arm that would need protection from the bowstring (on a right-handed archer, the inside left wrist).
They are usually found on the outside of the arm where they would have been more conspicuous.
Many have only two holes which would make them difficult to fasten securely to the arm, and some have projecting rivets which would catch on the bowstring and make them unsuitable for use as a bracer.
When the objects occur in barrows, they always occur in the central primary grave, a place thought to be reserved for heads of family and other important people.
Many show great skill in polishing and stone working, and few are found in areas from which their stone originates.
It seems likely that, as found in graves, these objects were used as symbols of status within family groups.
They may have been status symbols of prowess in hunting or war, possibly mounted as decorations on functional bracers.
However, one at least (from Barnack in Cambridgeshire) had pressed foil caps in each of its 18 holes.
These caps would have prohibited any form of rivet or cord being used as a means of attachment.
A few prehistoric wrist-guards made of gold or amber have also been found; these are generally accepted not to be functional.
Famous burials containing stone wrist-guards include the Amesbury Archer and Barnack Burial. 
  Arrow rest - Where the arrow rests during draw.
These may be simple fixed rests or may be spring-loaded or magnetic flip rests.
Back (of bow) - The face of the bow on the opposite side to the string  Belly (of bow) - The face of the bow on the same side as the string  Bow sight - An aiming aid attached to the riser  Brace height - The distance between the deepest part of the grip and the string; "fistmele" is the traditional term, referring to the equivalent length of a closed fist with the thumb extended, indicating the proper traditional distance used between the deepest part of the grip and the string.
Grip - The part of the bow held by the bow hand  Limbs - The upper and lower "working parts" of the bow, which come in a variety of different poundages  Nocking point - The place on the bowstring where the nock (end) of an arrow is fitted  Riser - The rigid centre section of a bow to which the limbs are attached  String - The cord that attaches to both limb tips and transforms stored energy from the limbs into kinetic energy in the arrow  Sling -A strap or cord attached to the bow handle, wrist or fingers to prevent the bow from falling from the hand  Tab or Thumb ring - A protection for the digits that draw the string.
Also provides better release performance.
Usually made of leather.
Tiller - The difference between the limb-string distances measured where the limbs are attached to the riser.
Usually the upper distance is slightly more than the bottom one, resulting in a "positive" tiller.
Reflects the power-balance between both limbs.  
No matter what attack or bow stroke is used, most violinists use a straight bow stroke, keeping the bow perpendicular to the string.
This ensures that the bow will stay in the desired sounding point and will create a consistent sound quality.
One technique to achieving a straight bow is as follows.
When taking a downbow, focus on the upper arm, the lower arm, and the hand/wrist.
First, move the upper arm backwards as if elbowing someone in the nose.
Next, follow through with the lower arm.
Near the end of the bow stroke, rotate the wrist and hand as if opening a jar of peanuts.
When used correctly, these motions will create a straight downbow bow stroke.
A crucial step is to watch the bow and make sure it remains straight.
An upbow is created in the opposite way.
Still keeping an eye on the bow, move the lower arm in the direction that it came.
Follow through with the upper arm.
Near the end of this stroke, rotate the hand and wrist as if closing a jar of peanuts.
There is, however, another school of bowing, popularized by violin pedagogue Ivan Galamian, in which the bow is kept at a slight angle to the bridge.
When the player draws a down bow, he is to move his right hand gradually away from his body; when he draws an up bow, towards his body.
According to proponents of this style, these slight angles help create greater contact with the bridge and thus produce a fuller sound.