Various types of compasses and drawing pens were combined in a box of drawing instruments. The compass in this set could draw circles up to 25 cm in diameter by means of an elongation rod. To draw very small circles a drop compass and a bowcompass is included, sometimes also a dividing compass with two pins.
For larger circles the needle and pencil are arranged on sliders on a rod, which might also be eleongated. I remember that once we needed a radius of 4m. Kneeling on the floor we just used an ordinary wooden rod of that length.
No comments:
Post a Comment