The said Board shall hear and determine all such claims, and if in any case the Board is of the opinion that a moral claim exists against the Commonwealth for any such injury or death, and that such claim is not properly adjustable or cannot then be adjusted under the workmen's compensation laws, it shall make a finding to that effect, and shall fix the sum which in its opinion will compensate the parent, parents, or dependent relative or relatives of the person killed or the person seriously injured. Any amount so fixed by the Board shall be payable from the appropriation hereinbefore made by warrant of the Auditor General, after requisition by the Secretary of Forests and Waters,¹ and to each such requisition shall be attached the findings of the Board. The action of the Board in allowing or disapproving a claim shall be final and there shall be no appeal therefrom, but the Board in its discretion may grant rehearings on any claim and make any new findings, in accordance with this act.