This section is from the book "The Laws Of Scientific Hand Reading", by William G. Benham. Also available from Amazon: The Laws of Scientific Hand Reading.
In examining a long finger of Jupiter, see if each phalanx is normal, or whether the length comes from excess in a single phalanx, or from two excessive phalanges and one short one. Remember where the tip of the normal-length finger should reach, then note which phalanx is deficient and which excessive. In reading this hand the excessive phalanges show the worlds in which Jupiteiian qualities would operate, and you can tell whether the subject wishes to lead in intellectual matters, business, or pleasures, and also which of these are absent by the deficient phalanx. Intuition and religion with the first phalanx, ambition and business with the second, desire to rule and gluttony with the third. If, with the thick third phalanx, you find great redness, gluttony will be still further fired by ardor and strength of blood current, and apoplexy with this subject is doubly certain. Apply color to each phalanx. White will make religion cold, business and ambitions cold, and decrease the ardor and danger of the thick third phalanx. Apply color qualities to the qualities of each phalanx as they are found in a greater or less degree, and it will further help in the reading.
This ability to separate and read each phalanx will give a complete mastery of the types, for it will enable you to tell which side of them will dominate.
Knotty fingers will add knotty qualities to a Jupiterian, and he will be an analyst and reasoner. If only the first knot is developed he will have mental order and system in carrying out his plans. If the second knot is developed he will have order and system in his business affairs and be neat in his personal appearance. With smooth fingers, impulse, inspiration, and artistic ideas will guide him. He will act on first impressions rather than by the slower, analytical methods of thought. With long fingers, he will go into minutiae, and in planning his Jupiterian campaigns, no details will be omitted. He will be suspicious and distrustful even of his own supporters, will be neat in appearance, and have all the other long-fingered qualities. Finding a Jupiterian has short fingers, you will know that he is quick in thought and action, impulsive, will dislike minutiae, and will plan the campaigns, but leave the carrying out of details to friends and supporters. Apply short-fingered qualities to the Jupiterian as a type, then to whichever world the Jupiterian qualities will operate in, judged from individual phalanges; in this way you can tell whether mental quickness, business, or common instincts will rule the short fingers. The supreme test is made by the thumb.
Are strong determination and reason back of Jupiterian desires and ambitions? Analyze the thumb, see what kind of will is present, as shown by the shape of the will phalanx, - whether clubbed, spatulate, square, conic, paddle-shaped, broad, or refined. Then see how much will there is by the length of the will phalanx. See if reason and logic are strong by length of the second phalanx, see what kind of reason by the shape of this phalanx, then see if will is stronger than reason, evenly balanced with it, or deficient. From these examinations you can tell whether good sense and determination will make the Jupiterian ambitions succeed or whether lack of these qualities will ruin them. No matter what the ambitions, there must be will and reason to bring them to anything. No matter how strong the Jupiterian, he must have a good thumb to make him what he was built to be, a commander and leader.
Now by discovering the type of the subject, you know what sphere in life he was created to fill. You can picture what the pure type looks like. His characteristics, his health difficulties and dangers, his faults and virtues, have been shown; whether he is refined or coarse (texture), has an elastic or stiff mind (flexibility), energy or laziness (consistency), is cold, warm, bilious, or congested (color), is nervous, has heart disease, consumption, bronchitis, is robust or weak, honest, cranky, or critical (nails), is full of vital energy (hair), lives in the mental, abstract, or material worlds (hand as a whole) what side his peculiar type qualities will take (phalanges of finger), whether artistic, practical, active, or original ideas will govern (tips), whether reason and analysis will rule (knotty fingers), whether inspiration will guide him (smooth fingers), whether minutiae and detail, or quick thought and action and generalities, will be his modes of procedure (long and short fingers), and whether will and reason will push all these qualities to a successful conclusion (thumb). Intelligent application of this information will enable you to read a subject accurately and thoroughly.
Unfortunately, we cannot have all good Jupiterians, but find the bad type so often that it must be fully considered. In this bad type the appearance is changed, the life, beauty, and strength diminished, and in place there is an undersized man, not commanding in appearance, eyes in which kindliness is lacking, a bad skin without the healthy glow of the good type, straight, stiff hair, a poorly shaped nose, mouth very large, full and sensual, with long, dark teeth. This Jupiterian is forbidding and unattractive, and no crowd follows in his steps. The bad type has all the Jupiterian love of command, but no power of enforcing it except upon those weak and unable to resist him. He is the tyrant and despot at heart, but frequently finds only his family upon whom to exercise these qualities. Thus in his home he is a person of overbearing pettiness. He is grossly extravagant, but in spending his money he furthers only his own pleasure and gratifies only his own appetite. He is a sensualist, selfish in the extreme, and a debauchee. His family are subjected to indignities and forced to submit to a tyrannical will.
 
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