Cancer

The Crab. The fourth sign of the zodiac. Its symbol presumably the folded claws of a crab, probably is intended to symbolize the joining together of a male and female spermatozoa — as indicative of the most maternal of all the signs.
The Sun is in Cancer annually from June 21 to July 22. Astrologically and astronomically it is the first thirty-degree arc following the Summer Solstice, marked by the Sun’s passing of the Tropic of Cancer, and occupying a position along the Ecliptic from 90° to 120°). It is the Leading quality of the Water element: negative, cold, moist, phlegmatic, nocturnal, commanding, moveable, fruitful, weak, unfortunate, crooked, mute. Ruler: Moon. Exaltation: Jupiter. Detriment: Saturn. Fall: Mars.
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Symbolic interpretation: The claws of the celestial crab; two spermatozoa intertwined, signifying the male and female seed, implying retirement and nurturing; the crab or scarab. Cancer expresses the living organism, its capacity to grow.
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First Decan: Moods, strong emotions, poetic and dramatic expression.
Second Decan: Revelation, resourcefulness, energy; powerful emotions; the struggle with sex.
Third Decan: Research, curiosity, discontent, restlessness; love of Nature; a stormy life. 
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0°…..Cusp of Eighth Lunar Mansion; a critical degree;
(1°-3°)Fortunate degrees;
(1°-2°)Degrees of sight.
2°19′ O° 54’S (3) Tejat, Eta Geminorum. A binary and variable star. (Mercury Venus) Pride, overconfidence, shamelessness, and violence.
4°…..A medical degree.
4°11′ 0° 50’S (3) Dirah, Mu Geminorum. A yellow and blue double star. (Mercury Venus) Energy, power, protection.
5°…..Degree of sleep and trance (5°- 6°)
7°59′ 6° 45’S (2) Alhena, Gamma Geminorum. A brilliant white star; called the wound in the Achilles’ heel. (Mercury Venus – Moon Venus) Eminence in art; accidents to the feet.
9°54′..Jupiter North Node. 10°….Historical degree.
11°….Degree of retentive memory; of cancer and alcoholism.
12°….Cusp of Ninth Lunar Mansion; a critical degree.
12°59′ 39° 39’S (1) Sirius, Alpha Canis Majoris. A yellow star; known as Orion’s big dog – the dog star. (Jupiter Mars – Moon Jupiter Mars) Honor, renown; custodians, guardians, curators; high offices in the government. When rising, said to confer great dignity; often associated with dog bites.
13°….Degree of business; also 12°, 14°, 15°, 16°.
14°….A fortunate degree.
15°….Exaltation of Jupiter. A suicide degree.
16°….Degree of duty. 16°57′.Solar Eclipse: July 10, 1945.
17°57′.Mars-Saturn conj.: March 20, 1946.
17°24′ 0° 11’S (3) Wasat, Delta Geminorum. A pale white and purple double star in the right arm of the Northern Twin. (Saturn) Malevolence, violence and destructiveness; associated with poisons and gases.
17°50° 5° 45’N (4) Propus, Tau Geminorum. (Mercury Venus) Eminence, strength, success.
19°8′ 10° 5’N (2) Castor, Alpha Geminorum. The mortal one of the heavenly twins; associated with Apollo. (Mercury – Mars Venus Saturn – Moon Mars Uranus) Violence; sudden fame; honors, followed by disgrace or imprisonment. Rising: weakness, sometimes blindness; injuries to face. 19°34′.Pluto North Node.
20°….Degree of limitation and hindrance.
20°46′.Mars-Saturn conj.: January 20, 1946.
22°7′..16° 0’S (1) Pollux, Beta Geminorum. The immortal one of the twins, son of Jupiter and Leda; associated with Hercules. (Mars – Moon Mars Uranus) Connected with poisons; the art of self-defense; subtle, crafty, rash, cruel. If rising, eye weakness, sometimes blindness; injuries to face; wounds, imprisonment. If culminating, honor, preferment, followed by disgrace. 23°….Degree of forethought.
23°11′.Saturn North Node.
24°….Degree of music.
24°41′ 16° 0’S (1) Procyon, Alpha Canis Minoris. (Mercury Mars — Moon Jupiter Uranus) Sudden preferment, the result of individual exertion; yet eventually the activity it promotes brings sudden misfortune. Afflictions threaten trouble with and danger through liquids, water, gas, poisons, or dog bites. When rising, said to inspire admiration for the canine species.
24°47′.Mars-Saturn conj.: October 20, 1945.
25°….Cusp of Tenth Lunar Mansion: a critical degree.
27°….Degree of farming. 28°….Fall of Mars. Has to do with the hair.
29°….Degree of the avid collector. 

DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.