home that does not have a romantic chemical history. Chemistry is everywhere evident; and to describe completely the chemistry embodied in the home, would require hundreds of volumes; possibly even then many fascinating principles that affect our daily life would remain hidden, because the chemist is a poor press agent. Chemistry affects all members of the family more than they will admit; even Dad, when he chooses a tie, takes a particular one because the chemist saw fitto dye it a certain color. In the future, chemistry will influence and enrich our home life to an extent now unimaginable because it is a creative science that treats of the transformation of matter, and such transformations may be unlimited in number and variety. We are conservative when we say that chemistry is a science the first chapter of whose book of Genesis is just beginning to be written. Bibliography Beery, Pauline, "Chemistry Applied ro Home and Community," J. B. Lippincott Co., Philadelphia, 1926. Howe, H. E., "Chemistry in Industry," Vol. I and 11, The Chemical Foundation, Inc.. New York, 1927. Rogers, Allen, "Manual of Industrial Chemistry," D. Van Nostrand Co., New York, 1919. Sherman, Henry, "Chemistry of Foods and Nutrition," The Macmillan Co., New York, 1928. Snell, John F., "Elementary Household Chemistry," The Macmillan Co., New York, 1927. Vallery-Radot, Rent, "The Life of Pasteur," Doubleday, Page & Co., New York, 1923.
Howe and Turner, "Chemistry and the Home," Charles Scribner's Sons, New York, 1927.
Sadtler, Samuel S., "Chemistry of Familiar Things," J. B. Lippincott Co., Philadelphia, 1927. Woolrich, W. R., "Handbook of Refrigerating Engineering," D. Van Nostrand Co., New York, 1929. McPherson and Henderson, "A Course in General Chemistry." Ginn & Co., Boston, 1927.
Spiral Chart Shows Relation of Elements. A few years ago matters pertaining to the arrangements of the chemical elements would have been supposed t o be purely the affairs of chemists, hut recently the American Physical Society, meeting with the Pacific Division of the American Association for the Advancement of Science a t Berkeley. California, heard how a spiral curve ran be used for convenience in studying them. Modern developments in both physics and chemistry have brought them so close together that the once sharp dividing line between them has almost completely disappeared. Dr. A. E. Caswell, of the University of Oregon, told the physicists that the elements could be put on the spiral curve, starting with hydrogen a t the center and traveling outward to uranium, the highest. Elements of the same family are along the same radial line, whilc the nonmetals are on one side and the metals on the other.Science Senn'ce
