The book has no illustrations or index. Purchasers are entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Title: How It Works Dealing in Simple Language With Steam, Electricity, Light, Heat, Sound, Hydraulics, Optics, Etc., and With Their Applications to Apparatus in Common Use; Subjects: Technology; Science; Juvenile Nonfiction / Technology / General; Juvenile Nonfiction / Technology / Inventions; Science / General; Science / History; Science / Study