question called for a legal conclusion and that it was a matter for the jury to determine.
The first contention on appeal is that it was error for the court to sustain the objection to the question of proximate cause.
The case of Smith v. Lockheed Propulsion Co., 247 Cal.App. 2d 774, 780 [56 Cal.Rptr. 128], states the applicable rule as follows: “ It is axiomatic that an essential element of a plaintiff’s cause of action, whether based on negligence or strict liability, is the existence of a causal connection between defendant’s act and the injury which plaintiff suffered. (Prosser, Law of Torts, (2d ed. 1955) p. 218 et seq.) [j[] Cause in fact, as well as proximate cause, is ordinarily a fact question for the jury. (Basin Oil Co. v. Baash-Ross Tool Co., 125 Cal.App.2d 578, 603-604 [271 P.2d 122]; Ishmael v. Millington, 241 Cal.App.2d 520, 525 [50 Cal.Rptr. 592] ; Burdette v. Rollefson Constr. Co., 52 Cal.2d 720, 726 [344 P.2d 307] Rest.2d Torts, § 434.) ”
And on page 783 of
Smith it is stated: “The fact that an expert’s opinion is on an ultimate issue to be determined by a jury is not ground for its exclusion.
(People v. Cole, 47 Cal.2d 99, 103 [301 P.2d 854, 56 A.L.R.2d 1435] ;
Magee v.
Wyeth Laboratories, Inc., 214 Cal.App.2d 340, 357 [29 Cal. Rptr. 322];
Carey v.
Lima, Salmon & Tully Mortuary, 168 Cal.App.2d 42, 45-46 [335 P.2d 181]).
“The crucial consideration in determining whether expert testimony should be received is whether ‘. . . the subject of the inquiry is one of such common knowledge that men of ordinary education could reach a conclusion as intelligently as the witness or whether, on the other hand, the matter is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact. ’
(People v.
Cole, supra, 47 Cal.2d 99, 103; Witkin, Cal. Evidence, (2d ed. 1966) § 409, p. 367). Expert testimony is admissible for the purpose of showing recognized accepted standards of practice in the professions. (Witkin, Cal. Evidence, (2d ed. 1966) § 420 p. 380).”
The exclusionary ruling in the case at bar was erroneous. However, under the circumstances, the error does not require reversal. (People v. Watson, 46 Cal.2d 818, 835-836 [299 P.2d 243].) Here, the expert testimony subsequently admitted adequately covered the subject matter of the causal conclusion with the exception of the word “proximate,” and hence no prejudice resulted.