This Florida diversity case is before this Court for the second time. The suit originated in 1963 when William G. Roe & Company (Roe) sued Armour & Company (Armour) claiming that the emission of fluorine gas from Armour’s phosphate plant resulted in the decreased production of the citrus crop in Roe’s nearby orange grove during the 1963 — 1964 season. After a non-jury trial, the district court entered its findings of fact and conclusions of law and rendered judgment for defendant Armour. The district court found that emission of fluorine gas from Armour’s plant caused “periodic, variable increases” in the fluorine content in the leaves of Roe’s citrus trees. The court found that the leaves had developed a chlorotic and necrotic condition, which may have resulted from “freeze damage, nutritional or mineral deficiencies, disease or fluorine” and that the loss of newly grown leaves in the spring of 1963 contributed to the decreased harvest for the *864 1968-1964 citrus season. The court also found that plaintiff’s grove suffered “substantial damage” from the freeze of December, 1962 despite plaintiff’s protective efforts, and that the decreased harvest was consistent with the freeze damage.
On the first appeal, this Court questioned the meaning of Finding of Fact No. 15, which reads:
“15. That the credible evidence in this cause is insufficient to support the conclusion that the citrus production or yield of fruit from the plaintiff’s grove for the citrus year 1963-64 was materially affected or reduced by the fluorine gas emitted from the industrial stacks at the defendant’s phosphate plant.”
This Court was unable to determine from that finding, “when considered with the Court’s other findings of fact,” whether the district court intended to find that the emission of fluorine from defendant’s plant was a present contributing proximate cause of the reduced citrus yield or whether the freeze was the sole cause of the injury. Accordingly, the case was remanded to the district court “for a more specific finding on this question.” Wm. G. Roe & Co. v. Armour Co., 5th Cir. 1967,
On remand, the evidence on causation adduced at trial was reargued pursuant to the trial court’s direction. No new evidence was presented. After reconsideration of the record, the district court entered amended findings of fact and conclusions of law. This time the court found: “That the fluorine gas emitted from the industrial stacks at the Defendant’s phosphate plant was a present contributing proximate cause, which together with the 1962 freeze produced the reduction in yield suffered by the plaintiff for the citrus year 1963-64 in the protected area of plaintiff’s groves.” The court then determined the amount of plaintiff’s loss caused by defendant rather than the freeze. It found that the normal yield should have been 63,900 boxes for the season and that the loss attributable to the freeze was equivalent to 50 per cent of a normal yield. 1 It found that approximately 18,800 boxes were harvested during the 1963-1964 season and that the yield loss suffered by plaintiff not attributable to freeze damage was 13,150 boxes of oranges. The court determined that the average market price for oranges for the 1963-64 season was $4.25 a box, calculated plaintiff’s loss at $55,887.50, and entered judgment awarding damages to Roe in that amount.
Both parties appeal. Their contentions, in the order of discussion, are: that the district court on remand deviated from the mandate of this Court by making new findings on causation; that the district court erred in apportioning damages between the defendant’s wrong and the freeze rather than imposing entire liability upon the defendant; that there was no demonstrable basis in the record for apportionment of damages; and that the district court improperly awarded damages to plaintiff on the basis of the market price without deducting the costs of production. We affirm.
I.
Upon the first appeal, this Court remanded the action to the district court “for a more specific finding” on the question of causation. Wm. G. Roe & Co. v. Armour & Co.,
supra
370 F.2d at
*865
831. Armour contends that the mandate of this Court restricted the district court on remand to the clarification of its
original
findings and that the court deviated from the mandate by reconsidering the record and making
new
findings on causation. Statements made by the district judge during the proceedings on remand indicate that original Finding of Fact No. 15 was, or at least was intended to be, a finding that fluorine from Armour’s plant was not a proximate cause of the loss. The district court thus clarified the meaning of its original finding, but reversed itself by finding for the first time that fluorine was a proximate cause of plaintiff’s loss. The issue therefore is whether the district court had the authority, consistent with the mandate of this Court, to change its prior fact findings without receiving further evidence. The doctrine of “the law of the case,” treated hereafter in connection with apportionment of damages (part II, infra) is inapplicable here. That doctrine relates solely to “the
principles of law
the court decided on the appeal,” Fountainebleau Hotel Corp. v. Crossman, 5th Cir. 1961,
Upon remand from an appellate court, the lower court is limited to carrying out the directions of the mandate; it “has no power of authority to deviate from the mandate,” Briggs v. Pennsylvania R. Co., 1948,
We disagree. Although, as Armour argues, the district court was not directed to reconsider its prior findings, it was nonetheless within the court’s power on remand to find that it had been wrong the first time and reverse itself. As the Second Circuit stated in a similar ease:
We think that, in the facts of this case, where the trial judge had by his own admission committed error, he could, without receiving any new evidence, correct that error when the matter was remanded to him for further consideration on just that point. It is not necessary for us to decide whether he would have such a power if we had specifically dealt with that matter on appeal. But in the absence of such circumstances we think it *866 clear the District Court was free to correct its error.
Imperial Chemical Industries, Ltd. v. National Distillers and Chemical Corp., 2d Cir. 1965,
I do not understand that any finding not adopted by the Circuit Court of Appeals either expressly or by necessary implication as a basis for its decision is irrevocable. * * * I see no reason why the findings may not be changed or modified, if, in the light of the entire record now before me, I should conclude that they are wrong or that, as stated, they did not correctly express what I meant to say.
William Goldman Theatres, Inc. v. Loew’s, Inc., E.D.Pa.1946,
A reading of the opinion rendered in the first appeal makes it plain that this Court did not intend to foreclose reconsideration of the original findings; indeed, the district court was invited to do so. This Court emphasized the possible inconsistency between the court’s finding on proximate cause and its other findings which implied that fluorine caused some reduction in the yield of fruit. Armour’s contention that the original findings can be reconciled does not detract from the fact that this is what this Court did on the first appeal. The language of the first opinion further obviates the notion that the court below was to be bound by its original findings on causation. The Court stated:
[W]e remand the cause to the district court for a more specific finding on this question. If the district court finds that the acts of the defendant were not a present contributing proximate cause, there will be no occasion to ascertain the damages suffered by the plaintiff; but if it is found that the defendant’s act of negligence was a present contributing proximate cause * * * the Court shall proceed to ascertain the damages to which the plaintiff may be entitled. (Emphasis added).
Wm. G. Roe & Co. v. Armour & Co.,
supra
This Court thus did not rule one way or the other on the original findings, except to conclude that they were ambiguous when considered as a whole; and a large measure of discretion was necessarily vested in the district court as to the manner of carrying out the mandate.
See
Holliday v. Pacific Atlantic S.S. Co., D.Del.1953,
II.
Having concluded that it was within the authority of the district court to reverse its prior findings on remand and to impose liability on the basis of its amended findings, we consider Roe’s challenge to the measure of damages. Roe contends that the district court erred in apportioning damages between the defendant’s wrong and the freeze rather than imposing entire liability upon the defendant. Roe argues that under Florida law where a defendant asserts the defense of an act of God, the defendant has the burden of proving that all of the damages resulted solely from the vis major or must be held accountable for the entire loss. Thus, once the district court found that Armour’s conduct was a contributing proximate cause of the loss, the entire loss had to be assessed against Armour regardless of whether Armour proved the amount of damage caused by the freeze.
By challenging the rule of apportionment applied by the court below on remand, Roe seeks to have this Court adopt a rule contrary to that set forth on the prior appeal. In remanding this case to the district court, this Court explicitly held: Wm. G. Roe & Co. v. Armour & Company, 5th Cir. 1967,
Under Florida law, when there is a determination that two concurrent causes result in damage, one of which was an act of the defendant and one an act of God, vis major, the burden is on the defendant to prove the amount of damage caused by the vis major or the defendant must bear the entire loss in accordance with the rule laid down in Atlantic Coast Line R. Co. v. Hendry (1933),112 Fla. 391 ,150 So. 598 . (Emphasis added).
must be followed in all subsequent proceedings in the same case in the trial court or on a later appeal in the appellate court, unless the evidence on a subsequent trial was substantially different, controlling authority has since made a contrary decision of the law applicable to such issues, or the decision was clearly erroneous and would work a manifest injustice. (Emphasis added)
White v. Murtha, 5th Cir. 1967,
Nonetheless, the law of the case doctrine “is not an inexorable command,” White v. Murtha,
supra,
We disagree. The question here relates to the portion of the total damage sustained which may properly be assigned to the defendant, as distinguished from the vis major. The
Hendry
decision, however, dealt solely with the issue of the defendant’s
liability,
not the measure of damages. Inasmuch as the question of the proper measure of damages remains even after liability is established,
see
Wise v. Carter, Dist.Ct.App.1960,
Roe argues secondly that the rule of apportionment set forth by this Court is contrary to the Florida doctrine of joint and several liability, whereby a wrongdoer may be held liable for the entire loss even though other causes may have contributed to it. The legal contention is that joint and several liability exists in any situation where two or more causes concur to produce harm, even when one cause is an act of God. There is little doubt that the concurrence of a human act and an act of God may in appropriate circumstances give rise to the principle of joint and several liability to the end that the wrongdoer may be held entirely liable. But Roe’s interpretation of the scope of the doctrine is unduly broad; joint and several liability is not imposed under Florida law simply because two or more causes concur to produce the plaintiff’s injuries. In the absence of concert of action or the- breach of a joint duty by the defendants, joint and several liability will be imposed only where the resulting harm is of an indivisible nature and is not subject to rational apportionment. In Louisville & N. R. Co. v. Allen, 1914,
Where, although concert is lacking, the separate and independent acts of negligence of several combine to produce directly a single injury, each is responsible for the entire result, even though his act or neglect alone might not have caused it. (Emphasis added).
Id.
The distinction between limiting the defendant’s liability to that part of the harm which he in fact caused and imposing joint and several liability, therefore, is between injuries which are reasonably capable of division, and injuries which are not. See also W. Prosser, Torts § 42 (3d Ed. 1964). Thus in De La Concha v. Pinero, Fla.Sup.Ct.1958,
Moreover, the principle of apportionment adopted by this Court on the first appeal of this action has been applied by the Florida courts to cases in which the defendant negligently injures a person suffering from a pre-existing injury. In such cases, the defendant must prove the amount of damage which is attributable to plaintiff’s pre-existing injury
or
otherwise bear the entire damage. Hamblen, Inc. v. Owens, 1937,
In sum, it appears that the Florida courts impose entire liability upon a defendant only where there is no reasonable alternative. In the present controversy there is no reason why part of the crop loss suffered by Roe cannot be logically and conveniently assigned to the freeze. See W. Prosser, Torts § 47, p. 252; cf. Permanente Metals Corp. v. Pista, 9th Cir. 1946,
Accordingly, we conclude that the rule of apportionment set forth by this Court on the first appeal was correct. Certainly, we cannot conclude that “the decision was clearly erroneous and would work a manifest injustice.” White v. Murtha,
supra,
III.
Roe next contends that even if the rule of apportionment applied by the lower court complies with Florida law, there was no adequate basis in the record on which the court could reasonably apportion the damages between the defendant’s wrong and the freeze. This argument is not directed at the correctness of the legal standard applied by the court below, but rather at the evidentiary basis for its findings. This contention is also without merit. The findings of the trial court are amply supported by the record. The Director of Citrus Research Investigation associated with the United States Department of Agriculture, in answer to a detailed hypothetical question setting forth the conditions existing in Roe’s protected acreage at the time of the 1962 freeze— these included the age of the trees, the temperature range and winds, the protective devices employed, and the twig damage and defoliation in the various sections of the field — testified that a crop equalling 25 to 50 per cent of a normal yield would be consistent with the freeze damage sustained by the grove. Or, conversely, his testimony indicated that a loss equalling between 50 and 75 per cent of a normal yield could be attributed to the freeze. The evidence thus established the total crop loss for the year and the amount of damage, albeit fixed within rather broad limits, attributable to the freeze. Roe has not recited any evidence to contradict this testimony and has not otherwise demonstrated that the findings of the lower court regarding apportionment are “clearly erroneous.” That is the end of the matter.
IY.
Finally, we consider Armour’s challenge to the measure of damages. The district court awarded damages to Roe on the basis of the average market price for oranges established during the 1963-64 season. Armour contends that the court should have deducted the probable cost of cultivating, gathering, and marketing the lost crop. It is argued that the reduced orange crop resulted in lower production costs, and that in the absence of such a deduction, the plaintiff would receive a windfall. We disa *872 gree. Although the costs of producing and marketing a crop should be deducted where it appears that costs were reduced by the lower yield, see generally, McCormick, Damages § 126 at 480, the evidence here indicates that no substantial cost reduction occurred. The testimony establishing the market value of oranges related to oranges on the tree. Costs of harvesting and marketing were not saved on the ruined portion of the crop since the purchaser would do the picking and hauling. The cost of cultivation and care for the grove was approximately the same as it had been for the prior season when the grove yielded a normal harvest, although Roe testified that he did fertilize somewhat lighter after he saw the fruit and leaf drop.
The costs of production in the year of the loss thus were substantially the same as those incurred in connection with a normal crop. This Court’s decision in Aerial Agricultural Service of Montana v. Richard, 5th Cir. 1959,
We are not prepared to say that the district court adopted an improper measure of damages or that its findings with respect to damages are clearly erroneous.
The judgment is therefore
Affirmed.
Notes
. The court explicitly found that the loss attributable to the freeze was the equivalent of 50% of a “normal yield,” or 50% x 63,900, not 50% of the loss, or 50% x 45,000 (63,900 minus 18,900, the amount harvested), as Roe suggests.
. “We did not rule as a matter of law that the facts found were the only facts which the evidence would support. On remand the lower court could, on reconsideration, have found the same facts and changed its holding, or it could have found different facts which were consistent with its original holding. It is the latter which occurred and there is nothing in the terms of the mandate from this court to prevent it.” Id.
. Roe’s argument that this Court’s concern on the first appeal was solely with the question of liability, rather than damages, and that it intended to adopt as the controlling rule of law the holding of Atlantic Coast Line R. Co. v. Hendry, supra, is squarely refuted hy the above portion of the opinion. The Court addressed itself to both liability and damages and adopted as the controlling rule of law application of the principle of apportionment, if supported by the evidence, “or” the rule of Hendry.
. In
Roosth,
this Court refused to reexamine its prior decision rendered in the same cause due to the “absence of any disagreement on controlling legal principles and the very substantial actual sameness of the two records.”
Id.
at
“This * * * is a deliberate choice and is in no sense the product of any erroneous notion that, as a matter of sheer power, application of that doctrine [law of the case] is mandatory. This would, of course, turn our backs on the principle so often recognized by this Court that while this is a rule guiding decision in a given case, the Court is not compelled to follow its former decision. We have too often held that this Court is, and must be, free to determine whether first, the prior decision was erroneous, and second, and more important, whether the circumstances are such that a different result should be reached.”
Id.
at
. Moreover, it appears that in at least one Florida case the defendant’s liability has been limited to that part of the harm which he in fact had caused, despite the asserted intervention of a vis major as a cause of the injury. Davis v. Ivey, 1927,
“ (24) If you find the defendant guilty on any count of the declaration * * * .then you could only find against the defendant for the amount of damages caused l>y him, and the burden is upon the plaintiffs to establish the amount of such damage by a preponderance of the evidence.” (Emphasis added).
Davis v. Ivey,
supra
. “The defendant must respond in damages for such part of the diseased condition as his negligence has caused and if there own he no apportionment, or it cannot be said that the disease would have existed apart from the injury, then he is responsible for the diseased condition."
Hamblen, Inc. v. Owens,
supra,
. In connection with the “manifest injustice” standard, we note, but do not emphasize, that on the first appeal, Roe championed the very principle of apportionment that it now so vigorously attacks, stating that “the analogy between this situation and that of wrongful injury to a person already suffering from some pre-existing condition is readily apparent.”
