ClipArt ETC
"Wood is heated in cylindrical iron retorts. the volatile materials are cooled, and while a portion remains gaseous and is used as fuel, a large part is condensed to a dark, tarry liquid." -Brownlee 1907

Cylindrical Iron Retort and Condenser

"Wood is heated in cylindrical iron retorts. the volatile materials are cooled, and while a portion…

"Configuration used to wash out a radiometer using oxygen. A, bulb containing perchlorate of potash; B, charcol; C, radiometer; D, outlet; E, used for examing the gas given off." —The Encyclopedia Britannica 1910

Washing Out a Radiometer

"Configuration used to wash out a radiometer using oxygen. A, bulb containing perchlorate of potash;…