| RASQ Toowoomba showgrounds | Vol.20.No.3.Page 11 |
| Re-badged windmills | Vol.21.No.4.Pages 7-11 (illus article) |
| - see - Dalgety K windmill | |
| - see - Elders K windmill | |
| - see - Excel windmill | |
| - see - Federation windmill | |
| - see - Horwood Bagshaw Type K windmill | |
| - see - Monitor SA windmill | |
| - see - Patco windmill | |
| - see - Runwell windmill | |
| - see - Metters K windmill | |
| - see - Wabco windmill | |
| Red Cross Manufacturing Company (USA) | Vol.21.No.3.Page 1 |
| Red Cross windmill | Vol.21.No.3.Page 1 (illus) |
| Reid and Gray (NZ) | Vol.20.No.1.Page 4 |
| Vol.21.No.3.Page 1 | |
| Vol.23.No.3.Pages 2-4 (illus article) | |
| Reid and Gray Ltd. | - see - Reid and Gray (NZ) |
| Reid and Gray - Oil Bath windmill | Vol.23.No.3.Page 4 |
| Reid and Gray - Oil Well windmill | Vol.23.No.3.Pages 2-4 (illus article) |
| Reid and Gray - Self Oiler windmill | - see - Reid and Gray Oil Well windmill |
| Renfrewshire (ship) | Vol.23.No.2.Page 8 |
| Reyburn, Robert | Vol.23.No.2.Page 6 |
| R. H. Wilson | - see - Wilson, R. H. |
| Richards, H. C. | Vol.20.No.3.Page 7 |
| Riddle windmill | Vol.21.No.2.Page 11 (illus) |
| Rivals, Claude | Vol.23.No.1.Page 7 |
| R. M. MacDougall and Co. Ltd. | - see - MacDougall, R. M. and Co. Ltd. |
| Robco Inc. (USA) | Vol.20.No.2.Page 5 |
| Robco - KM windmill | - see - Metters KM windmill |
| Roberts, Edith | Vol.21.No.4.Page 7 |
| Robins Eureka windmill | Vol.21.No.3.Page 11 (illus) |
| Vol.22.No.4.Page 11 | |
| Robins, Roy | Vol.22.No.4.Page 11 |
| Rodman, Terry | Vol.23.No.3.Pages 5, 6 (illus) |
| Roe and Cook Plumbing | Vol.22.No.1.Page 11 |
| Rogier, Etienne | Vol.23.No.2.Page 2 |
| Ronald, Bill | Vol.22.No.1.Page 5 |
| Ronaldson Bros. & Tippett | Vol.21.No.4.Page 8 |
| Royal Adelaide Show | Vol.22.No.2.Pages 3, 4 |
| Royal Agricultural Show - England | Vol.22.No.4.Pages 4, 5 |
| Royal Australian Air Force (RAAF) | Vol.23.No.1.Page 5 |
| Royal Autumn Show - Adelaide | Vol.20.No.2.Page 10 |
| Royal Easter Show - Sydney | Vol.20.No.1.Page 1 |
| Vol.23.No.2.Page 4 | |
| Royal Melbourne Show | Vol.20.No.3.Pages 8, 10 |
| R Pattern windmill | - see - Southern Cross R Pattern windmill |
| Running-In-Oil windmill | - see - Flint & Walling - Star Model 24 windmill |
| Runwell windmill | Vol.20.No.4.Page 11 (illus) |
| Vol.21.No.4.Pages 8, 9 (illus article) | |
| Rural Mechanical Aids Pty. Ltd. | Vol.22.No.2.Page 5 |