History of the star: A widely double star; alpha² and alpha¹, 3 and 6, pale yellow and light gray, in the southern Claw of the Scorpion in Libra.

The early Greeks did not associate Libra's stars with a "Balance" or "Scales", to them it was the Chelae; the Claws of the Scorpion.

This star alpha, Zuben Elgenubi, is the southern Scale of Libra; beta, Zubenelschemali, is the Northern Scale.

Arabic titles were Mizan Aliemin, Al Kiffah al Janubiyyah, "the Southern Tray of the Scale", from which came the Arabo-Latin Kiffa australis of modern lists; and as Al Wazn al Janubiyyah, "the Southern Weight", distorted into Vazneganubi. The Lanx meridionalis of two centuries ago is synonymous with the first of these Arabian designations.

The alphas (this star Zuben Elgenubi) and beta (Zubenelschemali) constituted the Arabic 14th manzil, Al Zubana "the Claws", although Al Biruni said that this title should be Zaban, "to push," as though one of the stars were pushing away the other (!).

This star, alpha, marked the Hindu 14th nakshatra Vicakha or Vishaka ("The Star of Purpose" (1), "Branched", or "Forked Branch". This lunar station was figured as a decorated Gateway.

The two alphas (this star Zuben Elgenubi) were the determinants of the 21st Babylonian ecliptic constellation Nura-sha-Shutu, "the Southern Light"; and some have included beta (Zubenelschemali) and gamma (Zuben Elakrab) with them in the Euphratean Entena-mas-luv, "the Star of the Tail-tip", as though they marked that part of the enormous, but undetermined, ancient Hydra of Chaldaea, the very early Afr of Arabia.

[Star Names, Their Lore and Meaning, Richard Hinchley Allen, 1889] 

Robson (Fixed Stars and Constellations in Astrology) says this star, the "Scale South", is symbolically called "the Insufficient Price". The two scales of Libra were the Price of the Deficient (Zuben Algenubi) balanced by the Price which Covers (Zubenelschemali). 

Influences of  the Arabic 14th manzil: Hinders journeys and marriage, harvest and merchandise, favorable for redemption of captives. With Moon transiting here; buy cattle but do not navigate. (Robson*).

Influences of Hindu 14th nakshatra (Moon Mansion) Vicakha or Vishaka: Those born on the lunar day will be religious, dealers in produce, and fond of red flowers. With Moon transiting here at birth native will be jealous, miserly, good-looking, clever in speech, honest, and quarrelsome. (Robson*).

The astrological influences of the constellation: The Scales are associated with the Hebrew letter Heth and the 8th Tarot Trump "Justice". (Robson*).

The astrological influences of the constellation given by Manilius:

"Balancing night with the length of day when after a year's space we enjoy the new vintage of the ripened grape, the Scales will bestow the employment of weights and measures and a son to emulate the talents of Palamedes, who first assigned numbers to things, and to these numbers names, fixed magnitudes, and individual symbols. He will also be acquainted with the tables of law, abstruse legal points, and words denoted by compendious signs; he will know what is permissible and the penalties incurred by doing what is forbidden; in his own house he is a people's magistrate holding lifelong office. Under no other sign would Servius [Servius Sulpicius Rufus, ca. 106-43 BC, extolled as the greatest of jurists by Cicero] more fittingly have been born, who in interpreting the law framed legislation of his own. Indeed, whatever stands in dispute and needs a ruling the pointer of the Balance will determine"  [Manilius, Astronomica, 1st century AD, book 4, p.239]

It is well to remember here the association of this star with a scorpion's claw, used for making love as well as for slaying its prey. It does not let go until one or other matter is complete and onlookers are not sure which of the two acts are in process. Sometimes even the Scorpion seems to get it wrong along the way! It frequently shows up ill-aspected in many unfortunate situations, from domestic strife and miscarriages of justice to psychopathic killings that started out in the guise of love. Its appearance in better aspect is often just the right moment to repair a relationship and to reconsider an earlier harsh judgment. Well aspected and on the 'right planet' we have someone of courage who will fight for right, but is generous to his opponents when they are defeated. If harshly aspected, especially to Mars, Saturn or the Moon, justice may well take a back seat to vengeance. (The Living Stars, Dr. Eric Morse). 

The unhelpful influence of this star is said to be noticeable especially in natives who were born during the night. A bad omen for health of the native is given if Sun or Moon is in conjunction with The Southern Scales. It has been noted that it is particularly disadvantageous to have Saturn or Neptune tied up with this star. Even the conjunction with Jupiter is credited as being adverse. Vehlow has recorded "confiscation of possessions during times of war'. A credit given to the Southern and Northern Scales is that they both bestow an immortal name. However, this comes about more by tragic circumstances than by well noted success. Conjunct the Ascendant, this star could mean rise in fortunes, followed by a downfall. There is also an indication of danger coming about in connection with water. (Fixed Stars and Their Interpretation, Elsbeth Ebertin, 1923)

With Fortuna: Loss by thieves, soldiers, servants, gambling, speculation, fire and lawsuits. (Robson*).

With Sun: Sickness, loss in business and through fire or speculation, disgrace, ruin, disfavor of superiors, suffers through wrongful accusations, sickness to family. (Robson*).

With Moon: Trouble through opposite sex, wrongful accusations, disgrace, ruin, mental anxiety, loss of relatives, many disappointments, much sick- ness, disease in those parts of the body ruled by the sign. (Robson*).

With Mercury: Crafty, revengeful, treacherous, quick mind, bad health, bad for gain, disgrace, poverty at end of life. (Robson*).

With Venus: Bad for marriage, sudden and secret death, may be poisoned owing to jealousy of one of own sex. (Robson).

With Mars: Bitter quarrels, entailing bloodshed or death. (Robson*).

With Jupiter: Hypocrisy, deceit, dishonesty, pretended religious zeal for business purposes, danger of imprisonment. (Robson*).

With Saturn: Dishonorable, often escapes justice but finally suffers, jealous, quick-tempered, domestic disharmony, bad for marriage, gain and legacies; miserable death. (Robson*).

With Uranus: Sharp, cunning, dangerous, abnormal mind, thought reader, always injuring others, may commit undiscovered crime, violent passions but great control, secret revenge, latter part of life in asylum or prison, violent death. (Robson*).

With Neptune: Morose, melancholy, isolated, shrewd, cunning, evil use of occult powers and of poisons or drugs, cynical, dangerous, broods over some secret, peculiar death, often suicide. (Robson*).

References

*(Fixed Stars and Constellations in Astrology , Vivian E. Robson, 1923)