| Text | Length |
| Of concern to beekeepers | 24 |
| Of concern to otologists | 24 |
| Of coots, loons, etc. | 21 |
| Of copper or bronze: Abbr. | 26 |
| Of copper: Abbr. | 16 |
| Of course | 9 |
| Of course! | 10 |
| Of course: L. | 13 |
| Of course: Slang | 16 |
| Of cows | 7 |
| Of cranial cavities | 19 |
| Of crucial importance | 21 |
| Of culture | 10 |
| Of current interest | 19 |
| Of Czechs, etc. | 15 |
| Of dairy cows | 13 |
| Of dandruff | 11 |
| Of days gone by | 15 |
| Of Denmark: Comb. form | 22 |
| Of deserts | 10 |
| Of detective Sherlock | 21 |
| Of different meanings of words | 30 |
| Of dinner | 9 |
| Of diodes, triodes, etc. | 24 |
| Of direct descent | 17 |
| Of district | 11 |
| Of districts | 12 |
| Of doubtful morals | 18 |
| Of doves, hawks, etc. | 21 |
| Of dreams | 9 |
| Of dreams: Comb. form | 21 |
| Of durability | 13 |
| Of durable wood | 15 |
| Of duty or of sight? | 20 |
| Of earlier vintage | 18 |
| Of early times: Poet. | 21 |
| Of ears | 7 |
| Of ears or hearing | 18 |
| Of Earth's bisecting line | 29 |
| Of Earth's largest landmass | 31 |
| Of earth: Lat. | 14 |
| Of earthquakes | 14 |
| Of ebb and flow | 15 |
| Of ecological stages | 20 |
| Of egg stone | 12 |
| Of eight | 8 |
| Of electrical resistance | 24 |
| Of element #46 | 14 |
| Of element #5 | 13 |
| Of element #76 | 14 |
| Of element no. 56 | 17 |
| Of element no. 76 | 17 |
| Of endurance | 12 |
| Of enduring interest | 20 |
| Of England | 10 |
| Of England's oldest univ. | 29 |
| Of epic proportions | 19 |
| Of equal extent | 15 |
| Of equal length | 15 |
| Of equal size | 13 |
| Of equal speed | 14 |
| Of equal standing | 17 |
| Of Erie, Huron, etc. | 20 |
| Of exalted rank | 15 |
| Of excellent lineage | 20 |
| Of exceptional quality, Southern-style | 38 |
| Of eye tissue | 13 |
| Of family favoritism | 20 |
| Of farm life | 12 |
| Of farm management | 18 |
| Of farming: Prefix | 18 |
| Of fast times? | 14 |
| Of fate | 7 |
| Of feathery fauna | 17 |
| Of feelings | 11 |
| Of few words | 12 |
| Of fields or soil: Comb. form | 29 |
| Of fighting forces (abbr.) | 26 |
| Of fighting forces: Abbr. | 25 |
| Of film sound effects | 21 |
| Of finer quality | 16 |
| Of Finnish poetry | 17 |
| Of fission or fusion | 20 |
| Of fleets | 9 |
| Of flight | 9 |
| Of flight technology | 20 |
| Of flight: Prefix | 17 |
| Of Florentine or Roman style | 28 |
| Of flying | 9 |
| Of flying craft | 15 |
| Of flying machines | 18 |
| Of flying: Prefix | 17 |
| Of food plans | 13 |
| Of forearm bones | 16 |
| Of forests | 10 |
| Of form | 7 |
| Of form, as opposed to substance | 32 |
| Of former days | 14 |
| Of fossil lore | 14 |
| Of fraternities and sororities collectively | 43 |
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