Scientific American Supplement, No. 286, June 25, 1881 by Various is a rare manuscript, the original residing in some of the great libraries of the world. This book is a reproduction of that original, typed out and formatted to perfection, allowing new generations to enjoy the work. Publishers of the Valley's mission is to bring long out of print manuscripts back to life.

Scientific American Supplement, No. 841, February 13, 1892 by Various