Summary

Mahlon Pitney Wagner v. City of Covington — Opinion of the Court

Of course the transportation of plaintiffs' goods across the state line is of itself interstate commerce; but it is not this that is taxed by the city of Covington, nor is such commerce a part of the business that is taxed, or anything more than a preparation for it. So far as the itinerant vending is concerned, the goods might just as well have been manufactured within the state of Kentucky; to the extent that plaintiffs dispose of their goods in that kind of sales, they make them the subject of local commerce
Source: Wikisource

Mahlon Pitney Wagner v. City of Covington — Opinion of the Court

It is important to observe the precise point that we have to determine. It is indisputable that with respect to the goods occasionally carried upon plaintiff's wagon from one state to the other in response to orders previously received at their place of business in Cincinnati, plaintiffs are engaged in interstate commerce, not subject to the licensing power of the Kentucky municipality.
Source: Wikisource

Mahlon Pitney Wagner v. City of Covington — Opinion of the Court

They have a list of retail dealers in Covington to whom they have been and are in the habit of making sales. Two or three times a week a wagon or other vehicle owned by plaintiffs is loaded at the factory in Cincinnati and sent across the river to Covington, and calls upon the retail dealers mentioned, many of whom have been for years on plaintiffs' list and have purchased their goods under a general understanding that plaintiffs' vehicle would call occasionally and furnish them with such soft drinks as they might need or desire to purchase from plaintiffs.
Source: Wikisource

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