Curious assertion. From that link...
"...and the income and profits derived from any source whatever, except salaries, during the calendar year preceding the said first day of January next, and the said income and profits shall be ascertained, assessed and taxed in the manner hereinafter prescribed..."
In other words, an "income" tax that exempts salaries. So what were all those non-salary things that were being taxed? A brief examination of that bill indicates that they were almost all types of excise and sales taxes, not income taxes. Most of them were taxes on "luxury items" such as tobacco and alcohol and various entertainment and travel related industries. For example, this includes a 2.5% tax on sales by auction, a fee based tax of 5% on alcohol wholesaling, a flat annual fee for pawn broker sales, a property value assessment-based fee for hotels, a percentage fee for tobacco sales, a percentage fee on theater ticket sales and other similar entertainment activities, and various percentage based taxes on different types of liquor sales. In other words, hardly anything even remotely resembling the "income tax" you purported to have been contained in that bill. It was a nice try though - attempting to pass off sales and excise taxes as an "income tax." But as is typically the case with everything you post, it simply does not withstand scrutiny.
That upon the salaries of all salaried persons serving in any capacity whatever, except upon the salaries of persons in the military or naval service, there shall be levied and collected a tax of one per centum on the gross amount of such salary, when not exceeding fifteen hundred dollars, and two per centum upon an excess over that amount, to be levied and collected at the end of each year, in the manner prescribed for other taxes enumerated in this act: Provided, That no taxes shall be imposed by virtue of this act on the salary of any person receiving a salary not exceeding one thousand dollars per annum, or at a like rate for another period of time, longer or shorter.
Not trying to be 'willfully dishonest' are we?