THE CARNEGIE MUSEUM. 9 



purposes of display, and seven rooms which are used as laboratories 

 and offices. Three of the exhibition halls are situated on the second 

 lloor of the building and three upon the third. Two of the laboratories 

 are situated on either side of the lecture-hall on the first floor, and the 

 three remaining laboratories are in the basement of the building. The 

 floor space available for the display of the collections amounts, at the 

 present time, to a little more than twelve thousand square feet. The 

 floor space devoted to laboratories is" five thousand square feet. The 

 lecture-hall will comfortably accommodate about six hundred persons. 



OiROUXD PLAX of the PROPOSED ADDITION TO THE CARNEGIE INSTITUTE. 



The walls of a museum are to its contents what the frame is to a 

 picture. The generosity of the founder provided at the outset a beau- 

 tiful edifice under the roof of which to assemble the collections which 

 it was destined to contain, but he did not forget to provide for what 

 after all is the museum itself, and has from year to year supplemented 

 the income derived from his original gift of a million of dollars by 

 the purchase of collections, Avhich he has himself selected, or by 

 placing at the disposal of the Director of the Museum funds with which 

 to make special collections. 



