| Old Diary Leaves 4-7 | HS Olcott | y1900 | v21 | - | May | p449 |
| Etheric Waves (2) | Samuel Stuart | y1900 | v21 | - | May | p459 |
| obituary - Carl du Prel | Ludwig Deinhard | y1900 | v21 | - | May | p464 |
| The Caste System in India (4) The Re-Marriage of Widows | SC Basu | y1900 | v21 | - | May | p468 |
| The Collapse of a Branch | A Fiction | y1900 | v21 | - | May | p475 |
| A Word from Pythagoras | Alexander Fullerton | y1900 | v21 | - | May | p477 |
| Unity in Diversity - Its Proof - The Law of the Conservation of Energy | AE Webb | y1900 | v21 | - | May | p483 |
| More Invisible Rays & New Elements | anon | y1900 | v21 | - | May | p492 |
| Salt as Related to Plague & other Diseases | WAE | y1900 | v21 | - | May | p495 |
| Theosophy in all Lands - Europe | ABC | y1900 | v21 | - | May | p498 |
| NZ | anon | y1900 | v21 | - | May | p499 |
| America | DBB | y1900 | v21 | - | May | p500 |
| Cuttings & Comments | various | y1900 | v21 | - | May | p505 |
| White Lotus Day at Adyar | various | y1900 | v21 | - | June+ | p34 |
| Old Diary Leaves 4-8 | HS Olcott | y1900 | v21 | - | June | p513 |
| Esoteric Astrology as a factor in Evolution | George Edward Wright | y1900 | v21 | - | June | p523 |
| Poseidonis (1) | WH Trimble | y1900 | v21 | - | June | p528 |
| Glimpses of Theosophical Christianity (5) | Lilian Edger | y1900 | v21 | - | June | p536 |
| Australian Magic & Traditions | I Hooper | y1900 | v21 | - | June | p541 |
| Messengers of Truth | JJ Vimadalal | y1900 | v21 | - | June | p546 |
| NZ | anon | y1900 | v21 | - | June | p546 |
| Cycles (1) | Caroline Kofel ( - 1933) | y1900 | v21 | - | June | p548 |
| Anubhavananda Lahiri (4) | anon | y1900 | v21 | - | June | p553 |
| Self-Salvation or Self-Sacrifice | WG John | y1900 | v21 | - | June | p556 |
| The Date of Sri Sankaracharya | Siva | y1900 | v21 | - | June | p561 |
| Theosophy in all Lands - Europe | ABC | y1900 | v21 | - | June | p563 |
| America | anon | y1900 | v21 | - | June | p564 |
| Cuttings & Comments | various | y1900 | v21 | - | June | p575 |
| The President's Tour | anon | y1900 | v21 | - | July+ | p38 |
| Old Diary Leaves 4-9 | HS Olcott | y1900 | v21 | - | July | p577 |
| The Wisdom of the Sages | Kate Buffington Davis | y1900 | v21 | - | July | p587 |
| Alchemy & the Alchemists (1) | Samuel Stuart | y1900 | v21 | - | July | p593 |
| Cycles (2) | Caroline Kofel | y1900 | v21 | - | July | p603 |
| Heathen Cult & Lore in Russia (1) - The Tcheremiss of the Kazan Mountains (rprnt 1867) | P Znamensky | y1900 | v21 | - | July | p608 |
| The Wheel of the Good Law | WG John | y1900 | v21 | - | July | p613 |
| The Real Yoga | Jehangir Sorabji | y1900 | v21 | - | July | p618 |
| Madhavacharya - The Commentator of the Vedas (see April 1893) | J Perraju | y1900 | v21 | - | July | p622 |
| White Lotus Day Festival in Boston | anon | y1900 | v21 | - | July | p625 |
| Theosophy in all Lands - Europe | ABC | y1900 | v21 | - | July | p628 |
| America | anon | y1900 | v21 | - | July | p630 |
| Netherlands | anon | y1900 | v21 | - | July | p631 |
| NZ | anon | y1900 | v21 | - | July | p633 |
| Cuttings & Comments | various | y1900 | v21 | - | July | p636 |
| The President's Tour | anon | y1900 | v21 | - | Aug+ | p41 |
| Old Diary Leaves 4-10 | HS Olcott | y1900 | v21 | - | August | p641 |
| Alchemy & the Alchemists (2) | Samuel Stuart | y1900 | v21 | - | August | p651 |
| Heathen Cult & Lore in Russia (2) - The Tcheremiss of the Kazan Mountains (rprnt 1867) | P Znamensky | y1900 | v21 | - | August | p660 |
| The Heart | Jehangir Sorabji | y1900 | v21 | - | August | p665 |
| The Signs of the Times (1) | Thomas Banon | y1900 | v21 | - | August | p669 |
| Theosophy & Home Life (1) | Elizabeth W Bell | y1900 | v21 | - | August | p673 |