Chatty Readings in Elementary Science, Vol. 3 (Classic Reprint)

Excerpt from Chatty Readings in Elementary Science, Vol. 3

The publishers wish to acknowledge the kind assistance given to the editor of this volume, in connection with Lessons 28-31, by Mr. Eugene Blackford of New York, to whom they are also Это и многое другое вы найдете в книге Chatty Readings in Elementary Science, Vol. 3 (Classic Reprint)