Chicago. Jnne 16. - Solomon Van Praag, ex-legislator and a saloonkeeper, was on trial yesterday before Jndge Blodgett for violation of the United States eleetion laws in procuring faise testimony in naturalization cases. John Callaghan swore that Van Praag got hiin to swear to a lie in two cases and John Murray confirmad Callaghan's testimony. The deíense introdnced witnesses contradicting part of what Callaghan said, and others swearing that his repqtation was very bad.