Printed on pink paper. Illustrations of six Magneto-Electric machines used for medical purposes. Four of them are mounted in wooden boxes, the other two on wooden stands. They have horseshoe magnets in them and brass handles to turn them. The first one was manufactured by Daniel Davis in 1848, the next two by W. C. & J. Neff 1850-1860 and 1870, the fourth one by Ariel Davis patented in 1854, the fifth one Signed 'Davis' ca. 1850 and the sixth one Miller Cowen Dynamo Electric Machine, Knott Apparatus Company 1921. Written at the top of the page is: Spark Museum, Body therapy Machines.medical, magneto-electric machine - body therapy machine, daniel davis, w c & j neff, ariel davis, ashael davis, davis & kidder, miller cowan dynamo electric machine, knott apparatus company