What is Heat and How is it Used?

by | - uploaded on October 23, 2022, 7:50 am

A headpiece illustration from The World Around Us (1934) by Samuel Ralph Powers, Elsie Flint Neuner, Herbert Bascom Bruner, published by The Athenæum Press / Ginn and Company, Boston, https://archive.org/details/worldaroundus00powe/ ; p. 347, UNIT VII, "What is Heat and How is it Used?"