Dobbie

This action was brought by plaintiff, Henry Dobbie, against appellant, Pacific Gas and Electric Company, a corporation, hereinafter called the gas company, to recover damages for personal injuries sustained on its premises.

The plaintiff, a sheet and metal worker, was in the employ of W. Heidt, an independent contractor, who was under contract with the gas company to reconstruct a blast-pipe and do other work of like character in and about the generator building of the^plant of the company in San Francisco.

The complaint alleged that on the day of the accident and for a long time previously there had existed on the roof of the generator building a glass skylight, which was near the place where the plaintiff was required to work; that the gas company had knowingly permitted the skylight to become covered to a depth of several inches with cinders and soot discharged from its gas generators; that this rendered the skylight invisible to any person on the roof of the building and caused the same to appear to be a part of the solid portion of the roof; that the true conditions were unknown to plaintiff, who, in the course of his employment, stepped upon the skylight, which broke with…