Obvious minor punctuation and typographical errors have been corrected silently.
Regularly printed scientific names have been italicised for consistency.
Some diacritical symbols on French and German words have been corrected or added for consistency.
Some phonetics have been corrected or completed where this was important for their pronunciation, not for the sake of consistency.
Illustrations and tables have been moved out of the text when they were printed inside paragraphs; footnotes have been moved to directly underneath the paragraph or table to which they belong.
Various pages: Pharoah has been changed to Pharaoh.
Comparative History of Nations: several entries have been moved to maintain the given chronological order.
Indicator letters have been added to some pronouncing dictionaries for consistency.
| Page | iv | Pd.D. changed to Ph.D. (Susan Chase) |
| Page | ix | Mother-Play Sons changed to Mother-Play Songs |
| Page | 10 | Vanderwolker changed to Vanderwalker |
| Page | 15 | diagrams Keppler’s Laws: right and left in caption changed to bottom and top, respectively; moves round the run changed to moves round the sun |
| Page | 27 | Pullox changed to Pollux |
| Page | 37 | Pullox changed to Pollux |
| Page | 49 | Age Fishes changed to Age of Fishes |
| Page | 62 | Cypress changed to Cyprus |
| Page | 67 | severally shaken changed to severely shaken |
| Page | 75 | Pebblshire changed to Peeblesshire; Chevoit changed to Cheviot |
| Page | 85 | internal changed to interval |
| Page | 106 | row Orthoclase, 2nd column: repeated mention of Feldspar deleted |
| Page | 108 | Ship dip changed to Sheep dip |
| Page | 150 | Minulus luteus changed to Mimulus luteus; 4 inches changed to 4 weeks (Giant Spider Plant) |
| Page | 162 | a common tree changed to is a common tree |
| Page | 182 | Dicotoledons changed to Dicotyledons |
| Page | 195 | does not effect changed to does not affect |
| Page | 250 | Red Poles changed to Red Polls |
| Page | 252 | recenants changed to revenants |
| Page | 255 | Chevoit changed to Cheviot |
| Page | 256 | large of “lard” changed to large or “lard” |
| Page | 258 | botlong, changed to both long.; fois-gras changed to foie-gras |
| Page | 273 | Early Iron Age: 100 to 500 B.C. changed to 1000 to 500 B.C. |
| Page | 312 | Caucuses changed to Caucasus |
| Page | 316 | Lake Mœ is changed to Lake Mœris |
| Page | 317 | 604-651 changed to 604-551 |
| Page | 318 | Perides changed to Pericles |
| Page | 322 | Asdrubal changed to Hasdrubal for consistency |
| Page | 332 | B. C. changed to A. D. (table header) |
| Page | 333 | B. C. changed to A. D. (table header) |
| Page | 341 | Crete lost the Arabs changed to Crete lost to the Arabs |
| Page | 342 | See pages 000, 000 changed to See page 351 (description of the sphinx) |
| Page | 343 | Header EXTINCT NATIONS OF THE PAST added as in tables of contents |
| Page | 349 | the good Anubis changed to the god Anubis |
| Page | 382 | LATER HISTORY OR changed to LATER HISTORY OF |
| Page | 397 | At Alexander changed to At Alexandria |
| Page | 398 | SEPIDUS changed to LEPIDUS |
| Page | 410 | Entries for Danish Kings and Canute the Great placed in chronological order; Rhœtia changed to Rhætia |
| Page | 420 | Frances defeated changed to Francis defeated |
| Page | 427 | 1756-1763 changed to 1754-1763; 1678 changed to 1768 |
| Page | 428 | Prussia and Austria, 1711 changed to Prussia and Austria, 1781 |
| Page | 438 | Fallierès changed to Fallières |
| Page | 440 | Poincarè changed to Poincaré |
| Page | 442 | table Area and Population: 7.05 changed to 7.55, 48.02 changed to 48.20, 29.9 changed to 28.2; table Religious Population: 36,000,000 changed to 36,600,000; 58,270,000 changed to 158,270,000; 125,000,000 changed to 25,000,000 |
| Page | 443 | Poincare changed to Poincaré; Vagiravudn changed to Vagiravudh |
| Page | 446 | Orœfa changed to Oræfa |
| Page | 463 | Axon changed to Avon |
| Page | 464 | Chantry changed to Chantrey |
| Page | 471 | table (entry Mauritius): Executive and Councils changed to Executive and Legislative Councils |
| Page | 473 | table (entry King John): 199 changed to 1199 |
| Page | 492 | Marsla-Tour changed to Mars-la-Tour |
| Page | 518 | Cœcilia changed to Cæcilia |
| Page | 525 | Placenza changed to Piacenza |
| Page | 562 | are said to be abundance changed to are said to be abundant |
| Page | 571 | Rhœto-Romanic changed to Rhæto-Romanic |
| Page | 662 | One of more changed to One or more |
| Page | 669 | Caspé changed to Gaspé |
| Page | 693 | Decclea changed to Decelea |
| Page | 696 | Jan van Olden, Barneveldt changed to Jan van Oldenbarneveldt |
| Page | 700 | Chattanooga, Georgia changed to Chattanooga, Tennessee |
| Page | 701 | (Bosworth Field): 1845 changed to 1485; (Siege of Calais): English vs. French changed to English vs. French |
| Page | 702 | kon-stan-nō´pl changed to kon-stan-ti-nō´pl |
| Page | 703 | zhe-mäk´ changed to zhe-mäp´; Hōchst changed to Höchst |
| Page | 705 | nü´pö changed to ma´pö |
| Page | 709 | Texel: † added |
| Page | 734 | paragraph * Name-making ... moved up one paragraph |
| Page | 741 | 5th ◡ changed to — (Iambic pentameter) |
| Page | 742 | desprit changed to d’esprit |
| Page | 743 | albuon changed to al buon |
| Page | 750 | sono multi changed to sono muti (also in phonetics) |
| Page | 751 | mennière changed to meunière (and moved to proper alphabetical place) |
| Page | 752 | petits fois changed to petits pois (also in phonetics) |
| Page | 753 | enchef changed to en chef |
| Page | 754 | tâche sans tâche changed to tâche sans tache |
| Page | 770 | Ecclestical changed to Ecclesiastical |
| Page | 775 | Rosetti changed to Rossetti |
| Page | 778 | effected changed to affected; Calvanism changed to Calvinism |
| Page | 780 | Bigelow changed to Biglow |
| Page | 799 | Whence these storied changed to Whence these stories |
| Page | 802 | Kadr, Al changed to Kadir, Al |
| Page | 810 | chantler changed to cantler |
| Page | 816 | Altorf changed to Altdorf |
| Page | 847 | Amphlon changed to Amphion; CΥculus changed to Cæculus; |
| Page | 853 | 7⁄9 + 4 changed to 7⁄9 × 4; 111⁄27 changed to 111⁄24 |
| Page | 854 | .564 changed to 564 (in first multiplication) |
| Page | 855 | $43.35 changed to $4.35 as in calculation |
| Page | 859 | For, changed to For example, |
| Page | 882 | (3) inserted before Metathetical |
| Page | 885 | M. P. 272° changed to M. P. -272° (Helium) |
| Page | 886 | ZuS changed to ZnS (zinc blende) |
| Page | 887 | MgSO₄, 7N₂O changed to MgSO₄, 7H₂O |
| Page | 888 | CaH₄(PO₄)₂ changed to CaH₂(PO₄)₂ |
| Page | 891 | B. P. 109° changed to B. P. -109° (Xenon) |
| Page | 894 | N₄H.OH changed to NH₄OH |
| Page | 998 | Petsal changed to Petsai |