Pierce Butler, United States v. Burton Coal Company…
“ Appellant's liability is not measured by appellee's losses or gains, if any, under its agreements with the mining companies. Appellee is not entitled to have the full contract price of the coal not delivered, but is chargeable only with its market value. The difference between that value and the contract price is the amount of damage deemed by the law directly and naturally to result in the ordinary course of events from the appellant's breach of contract. The cost to appellee of securing the coal and the amount of its profits are immaterial. ”
