A set of 38 acrylic “French Curves” used for drafting smooth irregular curvatures. The curves, which measure from 8 cm in length to 60 cm, are contained in a two-layer wooden box. The box is 68 cm long, 18 cm wide and 6 cm in height and has markings that indicate the artifact is a 1864S model of curves manufactured by the famous Keuffel & Esser (K&E) company. The bottom of the box also indicates it was the property of the Applied Mathematics Branch at CRNL.