CINCINNATI, Ohio, May 21. GEORGE TAPPER, President Builders' and Traders' exchange, Chicago: Every true American will indorse the sentiments promulgated in your code of principles. JAMES ALLISON, President National Association Master Plumbers. MILWAUKEE, Wis., May 23. GEORGE C. PRUSSING: The Milwaukee association wishes to convey to the Chicago exchange the fact of its full concurrent sympathy in the position it has assumed, as it believes the battle must be fought just on this line. O. H. ULBRICHT, Secretary. These telegrams were read in the exchange and were received with rounds of applause. THE PLATFORM MODIFIED. On Monday, May 23d, the Conference of the Building Trades met and modified the platform of principles which had been adopted May 19th. The principle change was in eliminating the clause requiring employes to _sign_ the code of principles, and making it necessary only for them to "_assent to_" them. The platform as amended was as follows: 1. From this time forth the assent to the following code of principles by the employe be made a universal condition of employment by all building interests of Chicago--viz.: I recognize the right of every man to decide for himself, when he shall work or cease to work, where he shall work, for whom he shall work, how many hours he shall work, and for what wages he shall work. I recognize the right of every employer to decide for himself, whom he shall employ or cease to employ; to regulate and manage his business with perfect independence, provided only that he deal lawfully, justly and honorably with all men. I recognize the right of every father to have his son taught, and of every son to learn, any lawful trade, to be the same as his right to a knowledge of reading, writing, or any other branch of learning, which should be subject to regulation only by the laws of the land. By accepting of employment I agree in all my relations and intercourse with my employers and fellow workmen, to maintain and live up to these principles. 2. That this conference recommend to our respective organizations to request each of its members to employ such workmen only who recognize the inalienable rights as above set forth. 3. That public announcement be made at once that business will be resumed on or before June 1, 1887, with this code of principles as a basis.