The opinion
Frank T. Gallagher, Justice
(concurring specially).
I concur specially in the results. However, I am of the opinion that in cases involving damages for loss or impairment of future earning *134 capacity evidence of the value of plaintiff’s earning capacity prior to the injury should he required in all cases where such evidence is available and where the plaintiff’s earning capacity is not of the type commonly known by the public. Such a rule tends to. limit speculation on the part of the jury without imposing a difficult burden of proof upon the plaintiff.