Electricity was cutting edge technology when this book was written, but motors and dynamos were expensive, so this Paul Hasluck book must have been a best-seller in its day. You get chapters on the various types and then a whole series of motors and dynamos you can build, mostly, but not all, small. Essentially the technicalities haven’t changed much over 100 years, so this is a good place to start if you fancy building your own motor or dynamo. 160 pages, well illustrated with drawings, diagrams & etchings. Paperback. Lindsay Publications.