This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Centrolinead. en The Centrolinead draughtsman's instrument invented by British engineer architect and mathematician Peter Nicholson Illustration from the book Practical Geometry google id FetJAAAAMAAJ pg PA Thomas Bradley Peter Nicholson PDold Line drawings Drawing instruments
Page 2023 Free-images.com. All images are Public Domain