In all the specifications that we have seen of the adopted New York Crystal Palace, no arrangements have been made for proper ven tilation. This is a most important oversight and should at once be provided for. The Lon don Crystal Palace, in a climate averaging 20 degrees below our summer temperature, was oftentimes far from comfortable. The heat of the atmosphere of the New York Crystal Pa lace, under our blazing summer sun, will be like that of an oven—mdash;it will really be a " hot house." Such a mass of glass as will enter into its composition, will so concentrate the solar heat as to make the atmosphere of the interior totally unfit for human beings to breathe. This can be remedied if measures are taken in season for proper ventilation. These measures must be undertaken on a grand scale to insure success.