| Year | 1919 |
| Date | 19-Jun |
| Volume | 40 |
| Issue | 947 |
| Page | 505 |
| Category | Practical Letters from Our Readers |
| Part | |
| Title | Model Making in North China |
| Author | Duplex |
| Notes | Honan, North China, some views of a model vertical condensing steam engine made in North China & an interior of a power house at Honan |