It hardly has been contended that the cross-examination of Dr. Baldwin was proper. The evidence thus obtained was plainly incompetent. It comes under the settled rule that neither medical books, though of recognized authority, nor the opinions of medical experts unless testified to by themselves as witnesses, can be received as evidence. Ashworth v. Kittridge,
The plaintiff contends that this error was cured by the fact that the judge, beside saying what already has been quoted, instructed the jury in his charge that they must not consider upon medical.questions the opinions expressed by the authors of medical books, but only those stated by the physicians who had testified.
In the present case the objectionable cross-examination, against the repeated objection and exception of the defendant, was continued so that as reported it covers more than five pages of the exceptions. Similar questions were put in different forms as to different treatises, ending with general questions calling for and eliciting answers as to any text -books that might agree with the claim of the plaintiff, and accompanied by the display of several medical books on the table of the counsel. As in Kaler v. Builders’ Mutual Fire Ins. Co.
But no such instruction was given. The incompetent evidence was not stricken out, and the jury were not told to disregard it. They were merely instructed, with emphasis and elaboration it is true, not to consider the opinions expressed by the authors of medical books; and the context abundantly shows that this meant only that they were not to consider such opinions as bearing upon the medical questions raised in the case. All the evidence remained before them, and they were left at full liberty to consider these opinions as differing from those of Dr. Baldwin and so bearing upon the weight of his testimony. As in Commonwealth v. Edgerly,
The effect of this error may have been more than merely to affect the amount of the plaintiff’s damages. Her right to recover at all depended upon the proof that she really had suffered injury. Sullivan v. Old Colony Street Railway,
Exceptions sustained.
