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Parts of the Bow and Their Functions
The way in which the bow is held and applied to the strings is directly related to the way the bow is constructed and has evolved.
Centuries of trial and error have gone into the development of bows that we use today.
The evolution of the bow is an excellent display of common sense responses to the increasing demands of music written for string instruments.
Wow, Scroll! 
Whew! I was sharing the tale of how music clefs originated with another class, so I set my music staff carpet to accelerando and arrived presto! Thanks for inviting me, Q!
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You floated by just in time!
Let’s begin now and learn about:
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Most often the Bow’s Stick is made of Pernambuco, a hard wood from the region in northern Brazil with the same name. Pernambuco is one of the tightest grain woods on earth. The density of the wood makes it strong and resonant, which is perfect for string instrument bows.
Bows are also made from composites of carbon and fiberglass fibers. Many bows designed for students are made from fiberglass, since they are extremely durable.
The modern day bow is quite different from Baroque bows, which were lighter and more flexible. The arch of the bow also has changed in order to match the demand of the intensity of music in different eras.
Bow-making requires patience and a lot of practice. The bow’s stick is carved and then slowly heated with steam, so that it can be curved.  The curving and weighting of the bow’s stick and balance created, is an art form in its own sense.
The better the stick is made, the better the bow’s performance versatility. Bow-makers earn their reputations by entering their finest bows in competitions held world-wide. The stick is the bow’s “back-bone” and gives strength and support to the instrument’s tone.
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Introducing the Bow     Parts of the Bow     The Stick     Horse-Hair     The Tip     The Frog     The Winding     How the Bow Works 
 Rosin     Preparing to Hold the Bow     Stick Training Exercises     Bowing Terminology     Down-Bow     Up-Bow     

Bow-Hand Set-Up    Finger Tasks and Functions     The Thumb     Meet ARC     Finger Segments     The Index-Finger   
Bow-Hand Pronation      The Center-Finger and Ring-Finger     Bow-Hand Fulcrum     Ring-Finger Propulsion     Bass Bows 
 Pinky Bow-Tasks     ‘Casting’ the Bow-Hand    Bow-Wrist Tasks    Rotational Inertia    Arco    Clay Smile Exercise    Meet ANGLE 

The Bow-Arm Box     The Shoulder Arc     Bow Contact-Point     String Lanes     Bow-Segment Mastery     Bowing Exercises 

Finding the Bow Contact-Point     “Painting With Sound”     Bowing Exercises Menu     Bow Taps     Bowing Traditions 

Perform Down-Bows     Perform Up-Bows     The Art of the Bow-Change     Articulations     Staccato     Legato 

Mastery Checkpoint One     Building Bow Control     Bow Speed and Bow-Arm Motion     Bow Planning and Distribution

Slow Moving Bow Strokes     Individual Bow Segments     Traveling the Bow     Bowing Dynamics     Mastery Checkpoint Two 

Advanced Techniques     Slurs and Articulations     Slur Training     Locating the Bow’s Balance Point     Ricochet and Spiccato 

Exploring Ricochet     Ricochet Control     Spiccato Training     Spiccato Control     Spiccato Brush Strokes 

Multiple String Crossings     Virtuosic Bow Strokes     Arpeggio Bowing     “Flying” Staccato     Mastery Checkpoint Three 

SCROLL’s List of Bow Strokes