Lincoln Rug Co. v. East Newark Realty

"The defendant is the owner of a group of buildings in East Newark, several of which are occupied by the complainant as tenant. Complainant operates a rug cleaning and dyeing business, and uses large quantities of steam which it buys from the defendant under a contract embodied in the lease. The dispute relates to the price of the steam. The contract fixes a base price of 75 cents per 1,000 pounds with this proviso:

"`If Landlord's cost to produce steam shall increase between the time of the signing of this lease and the beginning of the term provided for herein, Landlord shall, upon proof…