| Digest Nr | Subject and Author |
 |
| 2010.10.22.01 | Relative Quality of "Cheaper" Player Pianos, from Larry Mayo |
| 2009.03.07.08 | Ampico A Rewind Problem & Relative Humidity, from Bruce Clark |
| 2008.12.22.04 | Measuring Relative Humidity With a Hygrometer, from Spencer Chase |
| 2008.02.12.05 | Relative Humidity and the Piano, from Bruce Clark |
| 2006.11.14.10 | Relative Humidity and the Player Piano, from Bruce Clark |
| 2006.11.13.07 | Relative Humidity and the Player Piano, from Tom Sendall |
| 2005.04.07.03 | Relative Humidity and the Player Piano, from John A. Tuttle |
| 2005.04.06.06 | Relative Humidity and the Player Piano, from Ray Fairfield |
| 2001.09.06.03 | Piano Heaters & Relative Humidity, from John A. Tuttle |
| 2001.09.06.02 | Piano Heaters & Relative Humidity, from Richard Vance |
| 2001.01.27.07 | Relative Humidity and the Piano, from Tom Lathom |
| 2001.01.19.09 | Relative Humidity and the Piano, from Cecil Grace |
| 2001.01.18.04 | Relative Humidity and the Player Piano, from Joyce Brite |
| 2001.01.17.08 | Relative Humidity Effect On Piano Repetition, from Thomas Henden |
| 2001.01.17.07 | Relative Humidity Effect On Pneumatic Cloth, from Karl Ellison |
| 2001.01.17.06 | Relative Humidity and the Piano, from David A. Vanderhoofven |
| 2001.01.16.08 | Relative Humidity and the Piano, from John A. Tuttle |
| 2001.01.16.07 | Relative Humidity and the Piano, from Craig Smith |
| 2001.01.16.06 | Relative Humidity and the Piano, from Bruce Clark |
| 2001.01.15.04 | Relative Humidity and the Piano, from Karl Ellison |
 |