The Preparations In Dexter Hall—The Sasng-erf eat—Dayt om Philharmonics.The sale of wets for the spectacular opera of Cinderella la now open at John Chun* Co.'a This beautiful play la given but six times during Christmas' wee*, beginning Monday night next,with Tuesday, Wednesday, and Thursday nights, and . matinee* on Wednesday and Saturday afternoons. There Is to be a dressreheaml on Saturday night of this week.There have been several rehearsals of Cinderella, which have run reTy smoothly, and go to prove that Mr. Max Mare trek Is determined to make the opera a success. Me no doubt is aware that so far as the College of Music Is concerned It is rather a new departure. The critics and musicians who can notforge* the precise and scholarly system of Mr. Thomas in conducting the coljpge. are. of course, opposed td what they would severely stvle a claptrap innovation. They feel certain that Mr. Thomas would not have tolerated it under any consideration, if he had remained. In their opinion it is entirely out of place to encourage any such performance in the dignified College of Music, not because It is improper in any way, but because It points the wav to an evil tendency in the thosoUglmees of instruction. They claim that dramatic singing must not be encouraged in young pupils, because the consequent strain and effort Injure the vocal organs w hich are not yet perfectly developed. There ate many, however, who would encourage the movement because It introduces a new and necessary feature in the College of Music—namely, operatic singing. They reason that the young must be trained from the beginning to the dramatic style, in order to acquire that warmth and pathos so necessary for the eflect lu opera. Whatever opinion may be correct, and both skies seem to hare plausible reasons, the performance next week will be ohsorved with Interest by many. New and verv pretty decorations have been made for scenic edect. In the first a£t the scenes represented will be a wood and lake, a country region, and a room richly ornamented with antiquarian furniture. The second act represents a room in the palace, a kitchen with all the utensils to the smallest detail, and li lovely garden connected with the palace. all lit up by the moon. The terrace and palace Will be brilliantly illuminated. The third act opens with a hall scene, the columns to be de«,o-ratedln blue and gold. The auditorium has also been frescoed, and the elevator to Dexter Mali will be run every night of the opera for the convenience of the audience.The twenty-second Smngcrfest of the North Amer-