Public nature of hearings does not mean public may participate in all deliberations. The requirement that the proceedings be held in public is much like that which compels a judge to conduct business in open court. He is not compelled to allow the public to participate in his deliberations. People ex rel. State Bd. of Equaliz. v. Hively, 139 Colo. 49, 336 P.2d 721 (1959).

Board may consider any type of evidence. In the absence of a statutory mandate, boards of equalization are not required to examine witnesses, or base their action upon any particular kind of evidence, but may proceed in their own way, and upon any information satisfactory to them. Holly Sugar Corp. v. Bd. of Comm'rs, 10 F.2d 506 (D. Colo. 1926).