BOATENG v. VOLTA ALUMINIUM CO LTD Master and servant—Contract of employment—Conditions of service—Construction of—Clauses to be looked at as a whole to discover true meaning and intention of parties—Conditions of service containing four termination clauses—Clause I giving employee option of giving a month's notice or a month's salary in lieu of notice—Option unavailable to employer in clauses 2 and 3—Implication that employer having same option in clauses 2 and 3—Such implication being equitable.