“ It was there held that the Illinois practice of requiring constitutional questions to be taken directly to the Illinois Supreme Court and of refusing to review them if review was first sought in the Appellate Court satisfied the requirement. We adhere to that decision. The channel through which the constitutional questions, raised by petitioner in his attack on the amended order, could have been taken all the wy to this Court was not only clearly marked, it was also open and unobstructed. ”

“ Groome v. Freyn Engineering Co., 374 Ill. 113, 28 N.E.2d 274; People v. Kelly, 367 Ill. 616, 618, 12 N.E.2d 612; Geiger v. Merle, 360 Ill. 497, 505, 507, 196 N.E. 497.
This work is in the public domain in the United States because it is a work of the United States federal government (see 17 U.S.C. 105) . ”