This section is from the book "The Practice Of Palmistry For Professional Purposes", by C. de Saint-Germain. Also available from Amazon: The Practice of Palmistry for Professional Purposes.
Smooth.
Love of philosophy, social science, reality in art; well-ordained literary works; a talent for concciving business plans, Little enthusiasm; much inspiration, though, but strictly ruled over by reason. This is a strong and precious type.

All the subjects with square tipped fingers, whether smooth or knotted, are independent to a degree, and generally truthful.
The tendencies of the square type are bettered by this knot. They are born to love reasoning, and this knot will cause them to excel in it; they'll discuss everything, religious beliefs included; they'll be hard to convince; they are regular Thomases. They have a good capacity for intelligent, useful work.
This will increase the practical bent of the subject, but reduce his capacity for properly judging the cause before the effect. This type is that of the model employe, the disciplinarian, the pedagogue. Duty before everything; no discretion used. Obey, and, above all, be orderly.
Love of the natural sciences, of history, archæology, law. An excellent financier, fanatic of symmetry; prefers common sense to genius. Has no love for art, poetry, fiction. Apt to prefer the useful to everything else, and to drag down ideals when he has occasion to. But he is exact, honest and indispensable in all well-ordained commonwealths.
In Square Fingers, knots - especially second knots - are very frequent, almost the rule.

Smooth. Instinctive understanding of real life; an imperious need of activity, generally physical. Fondness for open air sports and occupations, for politics and the management of men, for travel.
Here we have the type of the aggressive infidel, of the scoffer at every ideal, of the "bom kicker," He hates sentiment, and has little use for ideal art. He wants art applied to industry. He loves realism, and is a positivist to an extreme degree. Fond of exact sciences and of researches in the domain of useful inventions.
The second knot will give still more intensity to the instincts developed by the smooth spatulate tips. The love for the beautiful is here at its lowest, but the fondness for well-ordered enterprise is at its best. Great generals.
Stronger than ever is the taste for activity in and out of doors. He wilt call science to his help in his vast enterprises; his mind is never satisfied if it does not tire his body.
In Spattilate Fingers knots are very frequent, especially the Second knot. Distinguish carefully between the spatu-late shape and the lower broadening due to the presence of the first knot.
Pointed - Intuition, high ideal of religion.
Conical - Perception. love of reading.
Square - Love of truth.
Sparttlate - Exaggerated love of action.
Pointed - Morbid fear of the supernatural.
Conical - Healthy belief in religion. Square - Prudence, Spatulate - Activity.
Pointed - Ideality in art, poetry. Conical - Artistic thought. Square - Truth in art. Spatulate- - Love of movement in art (drama).
Pointed - Science loved for its own sake.
Conical - Tact.
Square - Able to teach.
Spatulate - Good at active business.
 
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