loses his customer he will surely get another, or even that the farmer who is to supply the demand of the “advertised” dealer who supplants the “independent,” will be benefited by the change. Economic processes are not so automatic; there is a friction and a lag in them which cause most of our difficulties. The legislature might properly enough wish to make its temporary expedient as painless as possible, maintaining the general pattern of the industry while the exigency existed, restoring it to its former position when normal times returned. We can see nothing unreasonable, arbitrary or unfair in such a purpose.
The plaintiff finally insists that it has been gravely injured in the process; that the differential is out of proportion to its market advantage, assuming that it has any advantage. The evidence of this is not clear. The twenty-third finding says that the “advertised” dealers have lost sales to stores in bottles in larger measure than the “independents”; but the twentieth and twenty-second findings seem to show that between October, 1933, and November, 1934, the proportion rose slightly. It is true that the twentieth finding speaks generally of the “wholesale” market which ordinarily includes sales to hotels and restaurants, as well as to stores. Of course, it is possible that in 1933 the “loose” milk sold to hotels and restaurants was a smaller proportion of the “wholesale” market than in 1934; but we scarcely ought to assume so. However that may be, the consumption of milk generally has fallen in the past six years; for the “Metropolitan market” it was in 1934 only five-sixths of what it was in 1929. The plaintiff’s total business has not suffered so severely as that. Its “retail” or house to house sales during the same period fell off from 24,000,000 to about 18,000,000 quarts per month; its “wholesale” from 11,000,000 to about 9,-000,000. The proportion is about the same, even if we do not count “relief” milk. Probably “wholesale” here includes more than “store” milk; but it does not in the fifty-seventh finding. This shows the sales to stores of “loose” and bottled milk in representative weeks for four of the six years in question. The totals remained fairly constant until “loose” milk was banned in June, 1933. On the whole it has been dropping since that time, so that for the week of November 8, 1934, it was about 82% of that of June 8, 1933. The “loose” milk sold for the week of August 9, 1934, was about 83% of the week of June 8, 1933, and that for the week of November 8th, about 95%. It is hard to say how much it had fallen. The corresponding figured for bottled milk are about 82% and 79%. From finding fifty-eight, taking November for the years 1933 and 1934, it appears that the bottled milk fell off substantially, if we leave out “relief” milk, but not if we include it. How much the relief milk is a drain on bottled milk sold to stores is uncertain; it may well be for it goes to the same class of consumers, people of little means. In November, 19*33, the plaintiff sold 83% of its 1929 sales of “loose” and bottled milk, in November, 1934, 71%; it has lost 12%; but this includes bulk milk to stores which fell off daily from 47,000 quarts to 41,000, just about in the same proportion as the total; and it docs not include “relief” milk, whatever may be its effect. From all this it seems to us very doubtful whether the differential has really damaged the plaintiff at all.
If it has been damaged, it is because the price difference is greater than its comparative commercial advantage over the “independents.” It was obviously difficult in 1934 to find out what that advantage was; only experiment could tell and the field of experiment was somewhat limited. It may have been possible to fix the differential at a fraction of a cent; the market prices had at times differed by fractions before April, 1933. Conceivably it was also possible to sell to customers at fractions of a cent, though nobody has suggested it. In view of the character of the market it is not likely; and we may properly assume, we think, that if there was to be any differential to customers at all, it must be at least a cent. In the absence of some disturbing factor the plaintiff’s sales are determined by customers’ demand; that is, by the customers’ price. The only advantage to it if the differential to the stores were a fraction of a cent would lie in the fact that the retailer who would then by hypothesis have a wider spread, would do his best to push the plaintiff’s milk. So far it might profit by a narrow margin; but how far that would help it to hold its place, assuming that it would otherwise lose ground, it was quite impossible to forecast. It does not seem to us that the legislature was compelled to attempt such nice adjustments. It might well reason that a flat price would ruin the “independents,” and that a cent differential which the market had carried before would not seriously affect the “advertised” brands. Somebody must stand in