7 
Race Street, near 19th, by a flight of stairs. Its floor will be 
180 feet in length and 60 feet wide. It is surrounded by two 
galleries 20 feet wide, supported by 20 iron columns. The 
floors of these galleries are to be constructed of slate tiles and 
iron. The area of floor-space, including that of the galleries, 
in the museum is 18,518 square feet, or double that of the ex¬ 
isting academy. 
The cases will be placed at right angles with the walls, both 
on the floor and galleries, between the windows, which are not 
opposite, but so placed that those of one side of the building 
give their light to the piers on the other. A sky-light 66 feet 
in length and 24 feet wide will assist in thoroughly lighting 
every part of the museum. 
The walls of this wing of the Academy’s building are now 
raised to about twenty-five feet above the footway of the street. 
They require to be built about twenty-nine feet higher before 
they are crowned with cornice and roof. 
When the entire plan is realized this wing will be connected 
with a centre building and another wing on Cherry Street, on 
the same style of architecture. That part of the south wall of 
the wing in process of construction, which is of brick, shows 
the point where connection with the future building is to be 
made. 
The centre building is designed to contain only such specimens 
as are illustrative of the mineralogy and geology, the fauna and 
flora, all the natural resources of Pennsylvania. The south 
wing will contain a laboratory and lecture-room, and afford 
space for archaeological and ethnological collections, and future 
additions to the general museum. 
Though seven years have been spent in reaching the present 
condition of our enterprise, let us not despair of its full accom¬ 
plishment in a much shorter period. Scientific pursuits are 
growing daily in popular favor, and their usefulness is recog¬ 
nized more extensively than they ever have been. Our fellow- 
citizens are as public spirited and generous as those of any 
other locality, and appreciate the pleasure of giving substantial 
aid to every undertaking which is to contribute to the common 
