¶11. Where a building contract was drawn up by plaintiff, who is. a master mechanic, any obscurity in the contract will be construed against him, and in favor of defendants, who contracted the obligation which is sought to be enforced. C. C. 1958.
¶22. The Judge a quo properly admitted carpenters to testify as to the customary meaning of certain technical phrases used in the contract sued on. C. C. 1947.