Working Men's Convention at Pittsburg.
Pittsburg, Jan. 11.
--A Mass Convention of Working Men was held to-night.
There was an immense gathering.
Mr. Henry B. McCarty, President of the Trades' Assembly, was called to the Chair, and Mr. Wm. H. Moody, of the Typographical Union, appointed Secretary.
Resolutions, expressive of the strongest attachment to the Union, and calling on the President to execute the laws against all traitors, were adopted with the most hearty good will.
The call for a National Convention of Working Men at Philadelphia, on the 22d of February, was endorsed.