Children Using Scales Small 320×183 Medium 640×366 Large 1024×585 Download Tiff Original 2400×1371 | (1.2 MB) Description Five students are learning how to use scales to measure a book. They have balanced the book with some weights. Keywords equal, measurement, scales, students, weight Galleries Boys and Girls, School Students Source: George Wentworth and David Eugene Smith School Arithmetics: Primary Book (Boston: Ginn and Company, 1919) 42