Author

Perry, James W.

1 book found

Placeholder cover for James W. Queen & Co., sole agents for Profs. Ayton & Perry's new patent magnifying spring ammeters and voltmeters, patent ergmeters, ohmmeters, powermeters

James W. Queen & Co., sole agents for Profs. Ayton & Perry's new patent magnifying spring ammeters and voltmeters, patent ergmeters, ohmmeters, powermeters

James W. Queen & Company · First published 1887