card catalogue of all reference and circulating books is kept here. This department is at the service of those desiring information along any line. The special work of its seven assistants is to look up material and prepare reference lists for individuals and clubs, and to answer inquiries by letter and telephone.
Special collections in Reference and Lending Departments:
| Reference | Volumes | ||
| Bernd collection, Architecture | 2,768 | ||
| Merz collection, Music | 2,000 | ||
| Philatelic collection (estimated) | 550 | ||
| Reference and Lending | |||
| Schwartz collection, Ethics | 1,808 | ||
| Stuart collection, Single tax | 90 | ||
| Pittsburgh imprints (estimated) | 2,000 | ||
| Mounted photographs | 2,581 | ||
| Lending | |||
| Music, scores | 1,319 | ||
| Embossed books for the blind | 2,034 | ||
The Periodical Reading Room, seating 114, is also on the second floor. It contains current numbers of 1,060 periodicals and 123 newspapers, to which readers have free access.
Technology Department, occupying five rooms on the third floor, seating capacity, 250. There is shelf space for 14,000 volumes. The catalogue of this department includes all reference and circulating books in the Library on scientific and technical subjects. The collection is especially strong in the literature of chemistry, engineering, metallurgy and patents. More than 400 technical and trade peri-
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