Abstract: A method for the production of an absorbent polymer by the polymerization of a liquid containing an aqeous hydrophilic monomer solution in a reaction vessel provided with at least one rotary stirring blade, which comprises polymerizing said hydrophilic monomer in a reaction vessel wherein, at least a portion of the inner wall surface of said reaction vessel repeatedly exposed to said aqueous solution or said absorbent polymer and a gas has the surface roughness, R.sub.max, thereof adjusted to not more than 3 .mu.m and at the same time said portion of the inner wall of surface is kept cooled constantly to a temperature of not more than 70.degree. C. from behind said portion with a cooling medium.

Abstract: A bill handling apparatus which has a bill discharge outlet (13) for discharging instructed kinds of and instructed number of bills and which is to be shared between two tellers respectively located on the right and left sides thereof is provided with at least two receive members (42, 43) disposed in the left and right portions. The members are movable in the forward and backward directions and are used to receive discharge bills. If the teller who receives the discharged bills is on the left side, the receive member on the right side is proceeded; whereas, if the teller who receives the discharged bills is on the right side, the receive member on the left side is advanced. As a result, the bills discharged onto the receive members are inclined toward the left or right, which enables the teller on the left or right side to easily take out the bills.