discussed Cited "see" Porter v. Board of Plumbing Supervision of Department of Health See Equitable Loan Society, Inc., et al. v. Bell, Secretary of Banking, et al., 339 Pa. 449, 461 (1940), appeal dismissed, 311 U. S. 621 (1940); Kellerman v. Philadelphia, 139 Pa. Superior Ct. 569, 574, 575 (1940) (“The legislature constitutionally may refer to a person or body of persons, within limits, set by the terms, purpose, or policy of the enactment, or by recognized scientific findings in various fields, the independent determination of facts upon which the application or enforcement of the law is to depend.”), and cases cited and discussed therein.