What is "equation of condition"

Condition \Con*di"tion\, n. [F., fr. L. conditio (better condicio) agreement, compact, condition; con- + a root signifying to show, point out, akin to dicere to say, dicare to proclaim, dedicate. See Teach, Token.]

1. Mode or state of being; state or situation with regard to external circumstances or influences, or to physical or mental integrity, health, strength, etc.; predicament; rank; position, estate.

   I am in my condition A prince, Miranda; I do think, a king.
   --Shak.

   And O, what man's condition can be worse Than his whom plenty starves and blessings curse?
   --Cowley.

   The new conditions of life.
   --Darwin.

2. Essential quality; property; attribute.

   It seemed to us a condition and property of divine powers and beings to be hidden and unseen to others.
   --Bacon.

3. Temperament; disposition; character. [Obs.]

   The condition of a saint and the complexion of a devil.
   --Shak.

4. That which must exist as the occasion or concomitant of something else; that which is requisite in order that something else should take effect; an essential qualification; stipulation; terms specified.

   I had as lief take her dowry with this condition, to be whipped at the high cross every morning.
   --Shak.

   Many are apt to believe remission of sins, but they believe it without the condition of repentance.
   --Jer. Taylor.

5. (Law) A clause in a contract, or agreement, which has for its object to suspend, to defeat, or in some way to modify, the principal obligation; or, in case of a will, to suspend, revoke, or modify a devise or bequest. It is also the case of a future uncertain event, which may or may not happen, and on the occurrence or non-occurrence of which, the accomplishment, recission, or modification of an obligation or testamentary disposition is made to depend.
   --Blount. Tomlins. Bouvier. Wharton.

   Equation of condition. (Math.) See under Equation.

   On condition or Upon condition (that), used for if in introducing conditional sentences. ``Upon condition thou wilt swear to pay him tribute . . . thou shalt be placed as viceroy under him.''
   --Shak.

   Conditions of sale, the terms on which it is proposed to sell property by auction; also, the instrument containing or expressing these terms.

   Syn: State; situation; circumstances; station; case; mode; plight; predicament; stipulation; qualification; requisite; article; provision; arrangement. See State.