In our pages note has been made of the beautiful winter conservatory, made of brick and glass, in the Tower Grove Park at St. Louis. The excellent idea has occurred to Mr. Shaw that these houses may be so arranged as to serve for horticultural exhibition purposes when the winter stove plants are not there, and a new building, 150 by 30 feet, just put up in the Botanic Garden, has been arranged with this view. An accurate bust of Linnaeus has been made, to surmount this building, which was to be opened about the time we send this to press, with public ceremonies, including an eulogium on the great naturalist, pronounced by Dr. Engelmann.