# Scientific American 1929-04: Vol 140 Iss 4

Scientific American 1929-04: Volume 140 , Issue 4. Digitized from IA1627716-05 . Previous issue: sim_scientific-american_1929-03_140_3 . Next issue: sim_scientific-american_1929-05_140_5 .

- Kind: Magazine
- Series: Scientific American 1929-04: Vol 140 Iss
- Year: 1929
- Publisher: Nature America, Inc.
- Archive: [Internet Archive](https://archive.org/details/sim_scientific-american_1929-04_140_4)
- Licence or status: none stated by the archive
- Who can read it: Tweens profiles and older (placed by Invisible Network from what the archive says)

[Read it](https://invisiblenetwork.ai/print/ia/sim_scientific-american_1929-04_140_4/read)