Secret Work For The U.S. Government
A letter by Nikola Tesla to Mr. Foster, explaining that he is currently preocuppied with work on two projects, the wireless transmitter and the gas turbine, for which he is developing novel principles of work:
| No. | 08 |
| Subject | Wireless Transmitter |
| Date | October 15, 1918 |
| Short Description | Nikola Tesla to a Mr. Foster, enclosed in letter to left, regarding a new wireless transmitter and the Tesla gas turbine. |