Experimentaluntersuchung ueber den Mechanismus der Accommodation / von V. Hensen und C. Voelckers.
License information
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Experimentaluntersuchung ueber den Mechanismus der Accommodation / von V. Hensen und C. Voelckers. Credit: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London). Public Domain Mark