III · Science
Heavy and Light
Subjects
Size perception, juvenile literature · Size and shape · Weights and measures · Weights and measures, juvenile literature · Mathematics · Mathematics, juvenile literature
Language
ENG




![Cover of [William Wheeler Hubbell, authorized to apply for patents.] by United States. Congress. Senate. Committee on Patents](https://covers.openlibrary.org/b/id/10200621-M.jpg)
