Supreme Court of Oklahoma July 20, 1971, No. 44471 (Peter Kiewit Sons Company v. Barnes)

BLACKBIRD, Justice.

The claim involved here was filed in the State Industrial Court by respondent, Kenneth D. Barnes, hereinafter referred to as “claimant”, for disability compensation on account of a heart injury, alleging it was caused by “extreme heat, excessive strain and exhaustion”, while he was employed by the petitioner, Peter Kiewit Sons Company, a road building corporation, hereinafter