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1923 and free! Once copyrighted works newly entering the public domain

Select QAs - MATHEMATICS

The Teaching of Arithmetic by Lennes, N. J.
Call Number: QA135 .L4
Publication Date: 1923
Primary Number Projects by Losh, Rosamond
Call Number: QA135 .L8
Publication Date: 1923
Number Projects for Beginners by McLaughlin, Katharine L
Call Number: QA135 .M154
Publication Date: 1923
Differential Equations in Applied Chemistry by Hitchcock, Frank Lauren and Clark Shove Robinson
Call Number: QA371 .H6
Publication Date: 1923

QBs - ASTRONOMY

The Book of Stars for Young People by Olcott, William Tyler
Call Number: QB46 .O6
Publication Date: 1923

QLs - ZOOLOGY

Birds and Man by Hudson, W. H.
Call Number: QL676 .H88 1923
Publication Date: 1923