557. Experiments, models and apparatus.

Where a party seeks to establish any fact by experimental proof conducted for the purpose of litigation, he must at least 21 days before service of the application notice for directions1 or within such other time as the court may direct, serve on all parties a notice stating the facts which he seeks to establish and giving full particulars2 of the experiments proposed to establish them3. A party upon whom a notice is so served must within 21 days after such service, serve on the other party a notice stating whether or not he admits each fact