Do not upload new revisions over this file version without my explicit consent. Instead, use the possibility to upload a new version under a new name and tag it as a derivate or extract of this file.

This photo was created by Uwe Aranas. It is protected by law and is not in the Public Domain. However, it can be used free of charge by everyone under the terms of the license stated below.

• The requirements to comply with the terms of licence are:

- The image is credited with "Photo by CEphoto, Uwe Aranas / CC-BY-SA-3.0" or alternatively with "© CEphoto, Uwe Aranas / CC-BY-SA-3.0". If this is not possible due to shortage of space, please contact me first.

- You are required to release the image under the same license.

• Not required by the license but highly appreciated:

- Set up a weblink to the original image when you use the image in online media: https://commons.wikimedia.org/wiki/File:Portable-Refractometer-14.jpg

- Send me a specimen copy or a pdf when used in print media or the URL of the website where the image is used.

Please write an email to spam@aranas.de (where you substitute the word spam by cephoto2014), if you

• need the image in a higher resolution
• need my postal address for sending a specimen copy
• have further questions to the terms of licence

This file has been released under a license which is incompatible with Facebook's licensing terms. It is not permitted to upload this file to Facebook.