# | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
N (chemistry, alchemy, metallurgy, apparatus) : 661 titles
O (botany, herbals) : 106 titles
Object files () : 2 titles
OLD PER (early scientific periodicals) : 15 titles
OXF (Oxford local and university history, etc.) : 184 titles
P (zoology, general natural history) : 282 titles
PER (periodicals) : 432 titles
Prints (prints collection, printed ephemera, portraits) : 36 titles
Q (biography) : 734 titles
R (general science, general history of science, philosophy of science) : 926 titles