Biggs, Van Dusen and Rosenn, Circuit Judges.
VAN DUSEN, Circuit Judge.
This personal injury case is before the court pursuant to a notice of appeal filed by the defendant, Ford Motor Company, on November 4, 1969, stating that the "defendant * * * appeals * * * from the District Court order * * * granting a new trial [dated] October 20, 1969." This order granted a new trial for two reasons, neither of which had been clearly stated in the plaintiff's motion for a new trial,*fn1 which had been filed in April 1969 after judgment had been entered on a jury verdict for the defendant. A new trial granted for reasons not stated in a pending motion for a new trial is in legal contemplation action by the court on its own initiative.*fn2 Fed.R.Civ.P. 59(d) provides:
On Initiative of Court. Not later than 10 days after entry of judgment the court of its own initiative may order a new trial for any reason for which it might have granted a new trial on motion of a party. After giving the parties notice and an opportunity to be heard on the matter, the court may grant a motion for a new trial, timely served, for a reason not stated in the motion. In either case, the court shall specify in the order the grounds therefor.
The defendant urges on this appeal that, because of failure to comply with the notice requirements of Fed.R.Civ.P. 59(d), the district court lacked the power to enter an order granting a new trial. In Demeretz v. Daniels Motor Freight, Inc., 307 F.2d 469 (3d Cir. 1962), this court held that an order granting a new trial, normally not a final decision appealable under 28 U.S.C. § 1291 (1964), is treated as an appealable final order in the narrow situation where the judicial power of the court to enter the order is challenged on the ground that the order was entered more than 10 days after judgment for a reason not stated in a timely motion for new trial.
We do not find it necessary to resolve the question whether, in every case, failure to comply with the notice requirements of Fed.R.Civ.P. 59(d) deprives the district court of power to grant a new trial for reasons not stated in a pending motion for a new trial, because we have concluded that the reasons advanced by the district court are insufficient on the merits.*fn3 After a careful consideration of the record in this case, we conclude that neither of the two reasons relied upon by the district court would justify the granting of a new trial. The district court's first reason for granting a new trial was that the court erroneously admitted the testimony of the defendant's expert witnesses regarding the results of an experiment which was not shown to have been conducted under the same or similar conditions which existed when the accident occurred.*fn4 Specifically, the district court held that prior to the introduction of experiments on similar products, the proponent of such evidence must show that the party performing the experiment used "a product that was identical to the product in issue or at least a product that is as nearly identical as is possible." In the instant case, the product at issue was a Ford Falcon, and the products used in the alleged experiments were a 1957 Mercury and a 1964 Ford. Further, the district court held that the defendant had not met its burden of establishing that "the conditions which existed as [sic] the time and place of the happening of the accident were substantially similar to those in being at the time of the conducting of the [experiment]." We need not reach the question whether an adequate foundation was laid for the admission of results of experiments. A careful reading of the testimony convinces us that the defendant's experts were not testifying regarding the results of experiments, but were testifying regarding general principles of physics universal in their application.*fn5
The district court's second reason for granting a new trial was that the court failed to give an adequate jury instruction on strict liability. Specifically, the district court held that it failed to instruct the jury that the occurrence of a malfunction in the absence of abnormal use and reasonable secondary causes was evidence of a "defective condition" within the strict liability rule of Restatement (Second) of Torts § 402A (1965) and that this failure constituted serious prejudicial error,*fn6 Fed.R.Civ.P. 51 makes it emphatically clear that "no party may assign as error the giving or the failure to give an instruction unless he objects thereto before the jury retires to consider its verdict, stating distinctly the matter to which he objects and the grounds of his objection." Counsel for the plaintiff did not so object to any portion of the instruction on strict liability. Fed.R.Civ.P. 51 is a salutary rule which contributes materially to effective trial administration.*fn7 This is not a situation where there was "fundamental" error in a charge which was "highly prejudicial" and failure to rectify the error "would result in a gross miscarriage of justice."*fn8
Since we conclude that the two reasons relied upon by the district court do not warrant the granting of a new trial, the district court order of October 20, ...