The plaintiff, Gerald Graci, brought this action to recover for injuries received as a result of an accident which took place on June 13, 1972, at the Wilmington Road Shopping Plaza in Burlington. On that date Graci suffered severe burns when he came in contact with live power terminals inside a box-like structure which he was trying to nail shut at the shopping center. Graci at that time operated a dry cleaning establishment in the shopping center. The defendants are Charles R. McCauley, trustee of the Charles Realty Trust, owner of the shopping center, Robert G. Damon, doing business as Damon & Son Heating & Air Conditioning, a contractor engaged by McCauley to install air conditioning for another tenant in the shopping center, and Maynard M. Lind, doing business as Maynard M. Lind Co., hired by Dаmon to perform electrical work in connection with the air conditioning installation. The case was tried to a jury, *162 who returned a special verdict (as required by G. L. c. 231, § 85, as appearing in St. 1969, c. 761* 1 ), finding Graci’s damages to be $16,300, and apportioning the negligence as follows: Graci, 15%; McCauley, 40%; Lind, 40%; and Damon, 5%. The judge accordingly reduced the damages "in proportion to the amount of negligence attributable *163 to the person for whose injury, damage or death recovery is made” (G. L. c. 231, § 85, as amended through St. 1969, c. 761), and entered separate judgments for the plaintiff for $13,855.00 (85% of $16,300) against each of the defendants. All three defendants appealed.
Lind and McCauley contend that there was not sufficient evidence to warrant submitting the cаse against them to the jury. Lind also contends that it was error to deny his motion for a new trial. Damon does not contest the finding of negligence against him but argues that, since his negligence was found by the jury to be less than that of the plaintiff, the 1969 statute (see n.l) absolves him from liability. We affirm the judgments.
We summarize the events leading up to the accident as the jury could have found them from the еvidence in its aspect most favorable to the plaintiff.
Gelinas
v.
New England Power Co.,
When Graci gave Lind and Damon the keys to the electrical box, he requested that at the end of the day they *164 lock the box and return the keys to him. He cautioned them that children frequented the area and were destructive and that there was vandalism in the area. That evening the keys were not returned to Graci, and the doors to the electrical box were wide open. Graci nailed them shut. The keys were never returned to him, and the electrical box remained unlocked. In the course of about two and one-half weeks while the air conditioning was being installed, he spoke to Damon and Lind about the matter a number of times. A few days after Lind and Damon began work, Graci called McCauley and told him what had happened, that the electrical box was being left opеn, and that he had complained to Damon and Lind without any results. He also told McCauley that there were children in the area, that a dangerous situation was being created, and that he was nailing the electrical box shut. McCauley told Graci that he would speak to Damon and that "he would take care of it.” However, the matter was never taken care of, thоugh Graci spoke to McCauley about the condition twice more.
Lind left the job unfinished on June 2 because of the press of other work. At that time two live terminals were exposed in the electrical box. Damon continued working on the air conditioning installation but had no occasion to be at the electrical box until the morning of June 13. The previous evening, June 12, Graci had nailed the electrical box shut with three staging nails, one at the top, one in the middle, and one at the bottom. Late in the morning of June 13, he saw Damon at the electrical box, which was then open. At about 2:00 p.m. Graci discovered that the doors to the electrical box were open. There were children in the area, and he proceedеd once again to nail the doors. While doing so he slipped; his hammer made contact with the exposed live terminals, and he received a severe shock and burns to his hands and arms.
Lind’s liability.
The jury could have found on June 2, 1972, when Lind left the unfinished job, he left the electrical box open and did not return the keys to Graci. This
*165
obviously created a danger, known to Lind, from the live terminals in thе electrical box and was inconsistent with the high degree of care required in dealing with electricity.
Gelinas
v.
New England Power Co.,
Lind further argues that "any conduct by Mr. Lind in leaving the doors to the box unsecured ceased to be a dangerous force as of the moment when on June 12, Mr. Graci secured the doors____” But the jury could have found that Graci’s nailing the еlectrical box was not the equivalent of padlocking it. See
McMenimon
v.
Snow,
Lind’s motion for a new trial on the ground of newly discovered evidence was properly denied. The affidavit which asserts the basis for the motion (no oral evidence appears to have been taken) contains nothing on which the trial judge could have made the threshold finding that the evidence, claimed to be newly discovered, "was not available to ... [Lind] for introduction at the original trial by the exercise of reasonable diligence____”
DeLuca
v.
Boston Elevated Ry.,
McCauley’s liability.
McCauley concedes, as he must, that it was his duty as trustee of the trust which owned the shopping center to exercise a high degree of care to guard against the danger from the electricity on the premises.
Gelinas
v.
New England Power Co.,
Damon’s liability.
Damon argues that he is absolved from liability because the jury found his negligence to be less than Graci’s and that Graci could recover from him only if his "negligence was not as great as the negligence of the person against whom recovery is sought” — otherwise "the court shall enter judgment for the defendant.” G. L. c. 231, § 85, as amended by the 1969 statute (see n.l).
*168
Damon points out that the wording of the 1969 statute is the same as that of the Wisconsin statute (Wis. Stat. Ann. § 895.045 [West 1966]) in effect when the 1969 statute was passed. And indeed the Wisconsin statute has served as a model for statutes in other States and presumably in Massachusetts. See Forty-fifth Report of the Judicial Council (1969), Pub. Doc. No. 144, at 35. Damon contends that we should adоpt the Wisconsin case law which has consistently refused to compare a plaintiffs negligence with the total negligence of multiple defendants but has rather compared a plaintiffs negligence with that of each defendant, denying recovery against any defendant whose negligence was less than the plaintiffs.
Walker
v.
Kroger Grocery & Baking Co.,
However, the Wisconsin rule has been rejected in Arkansas in
Walton
v.
Tull,
In view of the
Walton
case and the split in the Wisconsin court, we cannot assume (as we ordinarily do; see
Commissioner of Banks
v.
Prudential Trust Co.,
Any assumption that our Legislature intended to adopt the Wisconsin rule is further vitiated by the 1973 statute (see n.l), which is entitled, "An Act providing for further clarification of the doctrine of comparative negligence,” amending the 1969 statute, which is entitled, "An Act limiting the effect of contributory negligence as a defense and
establishing the doctrine of comparative negligence”
(emphasis supplied). The 1973 statute changes the phrase "negligence of the person against whom recovery is
*170
sought” to read "the total amount
of
negligence attributable to the person or persons against whom recovery is sought.” It thus makes clear that the negligence of a plaintiff is to be compared with the total negligence of all the defendants, all of whom are liable to the plaintiff, with contribution among the joint tortfeasors on a pro rata basis in accordance with G. L. c. 231B, which remains unchanged. See 1973 Ann. Survey Mass. Law § 11.12, at 319. To be sure, the 1973 statute contains substantive changes (see paragraphs designated 1st par. and 3d par. in n.l), and it is for this reason that the statute is not made retroactive. But this does not preclude our looking tо those provisions of the statute which are clarifications in aid of interpreting the 1969 statute.
3
Hurle’s Case,
*171
This is an appropriate occasion to use G. L. c. 4, § 6, Fourth, which provides, among other things, that "words importing the singular number may extend and be applied to several persons or things.” And we thus construe "person” in the 1969 statute to mean "persons.”
Commonwealth
v.
Montecalvo,
Judgments affirmed.
Notes
Statute 1969, c. 761, approved August 22,1969, effective January 1, 1971 (the 1969 statute), rewrote G. L. c. 231, § 85, to provide in pertinent part as follows: "Contributory negligence shall not bar recovery in any action by any person or legal representative to recover damages for negligencе resulting in death or in injury to person or property, if such negligence was not as great as the negligence of the person against whom recovery is sought, but any damages allowed shall be diminished in proportion to the amount of negligence attributable to the person for whose injury, damage or death recovery is made. In any such action ... the jury shall return a spеcial verdict, which shall state: (1) the amount of the damages which would have been recoverable if there had been no contributory negligence; and (2) the degree of negligence of each party, expressed as a percentage. Upon ... the return of such a special verdict by the jury, the court shall reduce the amount of negligence attributable to the person for whose injury, damage or death recovery is made; provided, however, that if said proportion is equal to or greater than the negligence of the person against whom recovery is sought, then, in such event, the court shall enter judgment for the defendant.” Statute 1973, c. 1123, approved December 4,1973, effective January 1,1974 (the 1973 statute), again rewrote G. L. c. 231, § 85, to provide (among other things) as follows: "Contributory negligence shall not bar recovery in any action by any person or legal representative to recover damages for negligence resulting in death or in injury to person or property, if such negligence was not greater than the total amount of negligence attributable to the person оr persons against whom recovery is sought, but any damages allowed shall be diminished in proportion to the amount of negligence attributable to the person for whose injury, damage or death recovery is made. In determining by what amount the plaintiffs damages shall be diminished in such a case, the negligence of each plaintiff shall be compared to the total negligence of all persons against whom recovery is sought. The combined total of the plaintiffs negligence taken together with all of the negligence of all defendants shall equal one hundred per cent. [1st par.]... The defense of assumption of risk is hereby abolished in all actions hereunder. [3d par.] The burden of alleging and proving negligence which serves to diminish a рlaintiffs damages or bar recovery under this section shall be upon the person who seeks to establish such negligence, and the plaintiff shall be presumed to have been in the exercise of due care.” (4th par.)
The affidavit made by Lind asserts only that "I had no personal knowledge that the co-defendant, Charles R. McCauley, Jr., was a party to a separate legal proceeding pending in the Appeals Court of this Commonwealth under Docket N. 74-351, Charles R. McCauley, Jr., Trustee vs. Sons Pharmacy, Inc. — Sons Pharmacy, Inc. vs. Charles R. McCauley, Jr., Trustee.” (The owner of the pharmacy was a witness for the plaintiff.) No mention is made of the knowledge, or lack of it, of Lind’s attorney who tried the case together with McCauley’s counsel.
We note the addition in the 1973 statute of the fourth paragraph of § 1 (see n.l) which specifically places the burden of showing contributory negligence on the defendant. This had been eliminated when the 1969 statute superseded the earlier version of c. 231, §85 (as appearing in St. 1952, c. 533, § 1), which contained that provision. But it seems clear that there was no intent in the 1969 statute to shift the burden of shоwing lack of contributory negligence onto the plaintiff as it had been at common law (see
Brown
v.
Kendall,
We note in that case that the court said with reference to an amendment which they held to be clarifying, "However, the amendment was enacted soon after the present contrоversy arose, so it is just as logical to regard it as a clarification of an ambiguity and a legislative interpretation of the original act.”
