A correspondent of the Chicago Times has figured the matter out, and places the cost of a round trip, via the Baltimore and Ohio road, to the Oentennial, as folio ws : 1. Excursión ticket Obicago to Phüadelplia ana return $32 00 2. Four meals going. $3 00 ; f our meals returning, $3 00- total 6 ÜO '.!. Slipper, lodging and breakfast in Plüladelpnia one day 2 50 i. Street car f are, two trips 14 5. Admission to exposition 60 6. Noon lunch in Ctntennial grounds 60 Total cost of trip and one day at exposition. .$10 00 Slecping-car, doublé berth, each way $5 00. . . 10 00 Total $50 00 Each additional day at exposition as per items 3, i, 6 and 6 3 64 Froui the above statement it will be seen that a person can go to the Centennial by this line, with flrst-class acconimodations, and renmin ten days at a cost of $73.40- with sleeping-car, $83.40- two persons, occupyingthe doublé berth, $156.80.