The leading case dealing with the first of these questions is Coe v. Errol,[540] in which the matter at issue was the right of the town of Errol, New Hampshire, to tax certain logs on their way to points in Maine, while they lay in the river before the town or along its shore awaiting the spring freshets and consequent rise of the river. As to the logs in the river, which had come from Maine on their way to Lewiston in the same State, but had been detained at Errol by low water, the Supreme Court of New Hampshire itself ruled that the local tax did not apply, the logs being still in transit. As to the logs which had been cut in New Hampshire and lay on the shore or in tributaries of the river, both courts were again in agreement that they were still subject to local taxation, notwithstanding the intention of their owners to send them out of the State. Said Justice Bradley: "* * * goods do not cease to be part of the general mass of property in the State, subject, as such, to its jurisdiction, and to taxation in the usual way, until they have been shipped, or entered with a common carrier for transportation to another State, or have been started upon such transportation in a continuous route or journey."[541]
STATE TAXATION OF MANUFACTURING AND MINING
Under the above rule, obviously, production is not interstate commerce even though the thing produced is intended for the interstate market. Thus a Pennsylvania ad valorem tax on anthracite coal when prepared and ready for shipment was held not to be an interference with interstate commerce although applied to coal destined for a market in other States;[542] and in Oliver Iron Company v. Lord[543] an occupation tax on the mining of iron ore was upheld, although substantially all of the ore was immediately and continuously loaded on cars and shipped into other States. Said the Court: "Mining is not interstate commerce, but, * * * subject to local regulation and taxation. Its character in this regard is intrinsic, is not affected by the intended use or disposal of the product, is not controlled by contractual engagements, and persists even though the business be conducted in close connection with interstate commerce."[544] Likewise an annual privilege tax on the business of producing natural gas in the State, computed on the value of the gas produced "as shown by the gross proceeds derived from the sale thereof by the producer," was held constitutional even though most of the gas passed into interstate commerce in continuous movement from the wells.[545] And in Utah Power and Light Co. v. Pfost[546] the generation of electricity in a State was held to be distinguishable from its transmission over wires to consumers in another State, and hence taxable by the former State. Likewise, a State statute imposing a privilege tax on the production of mechanical power for sale or use did not contravene the interstate commerce clause although applied to an engine operating a compressor to increase the pressure of natural gas and thereby permit it to be transported to purchasers in other States.[547] Similarly, a tax so much per pound on shrimp taken within the three-mile belt of the coast of the taxing State was valid, since the taxable event, the taking of the shrimp, occurred before they could be said to have entered the interstate commerce stream.[548]
PRODUCTION FOR AN ESTABLISHED MARKET
But while the production of goods intended for the interstate market is taxable by the State where it takes place, their purchase for an established market in another State is interstate commerce and as such is neither regulatable nor taxable by the State of origin, provided at any rate their trans-shipment is not unduly delayed.[549] Thus, oil gathered into the pipe lines of a distributing company and intended for the most part for customers outside the State, is in interstate commerce from the moment it leaves the wells;[550] and a like result has been reached as to natural gas.[551] "The typical and actual course of events," says the Court, "marks the carriage of the greater part as commerce among the States and theoretical possibilities may be left out of account."[552]
REJECTION OF THE ORIGINAL PACKAGE CONCEPT IN INTERSTATE COMMERCE
But the question also arises as to when goods entering a State from another State become part of the mass of property of the former and hence taxable by it? In Brown v. Maryland,[553] Chief Justice Marshall, had remarked at the close of his opinion, "We suppose the principles laid down in this case, apply equally to importations from a sister State."[554] Forty-two years later, in Woodruff v. Parham,[555] an effort was made to induce the Court, in reliance on this dictum, to apply the original package doctrine against a Mobile, Alabama tax on sales at auction, so far as it reached "imports" from sister States. The Court refused the invitation; first on the ground that Marshall's statement was obiter, the point not having been involved in Brown v. Maryland; second, because usage contemporary with the Constitution and of the Constitution itself confined the term "imports" as employed in article I, section 10 to imports from abroad; third, because the tax in question was nondiscriminatory. At the same time, nevertheless, reference was made to the power of Congress to interpose at any time in exercise of its power over commerce, "in such a manner as to prevent the States from any oppressive interference with the free interchange of commodities by the citizens of one State with those of another."[556] The same result was reached a few years later in Brown v. Houston,[557] where it was held that coal transported down the Mississippi from Pennsylvania had been validly subjected by Louisiana to a general ad valorem property tax, having "come to its place of rest, for final disposal or use," and hence become "a part of the general mass of property in the State."[558] Again, however, a caveat was entered in behalf of the power of Congress to impose a different rule affording "a temporary exemption" of property transported from one State to another from taxation by the latter.[559]
INSPECTION CHARGES
Woodruff v. Parham and Brown v. Houston are still good law for the most part.[560] Nevertheless, there is one respect in which imports from sister States are treated as "imports" in the sense of the Constitution, and that is in being exempt from "unreasonable" inspection charges.[561] It is true, also, that in a series of cases involving sales of oil about 1920 the Court appeared to be contemplating reviving the original package doctrine,[562] but these holdings were presently "qualified" in a sweeping opinion by Chief Justice Taft, reviewing the cases.[563] But taxation is one thing, prohibition another. In the field of the police power, where its applicability was not so much as suggested in Brown v. Maryland, the original package doctrine has been frequently invoked by the Court against State legislation, and even today, perhaps retains a spark of life.[564]