Ten consecutive issues from March through Sepember, 1929. All are clean and tightly bound and measure 6-1/2"x9-1/2". Topics include, but are not limited to, thermochemical behaviors, sonic studies of the physical properties of liquids; the solubilities of lead phosphates; the principles concerning the structure of complex ionic crystals; the single potential of the copper electrode; the crystal structure of barium; the rate of recombination of atomic hydrogen; a new differential pressure gauge; a laboratory ozonizer; the study of the silver chloride electrode; the potato as an index of iron distribution; precipitated selenium dioxide; and an isotope of oxygen, Mass 17, in the earth's atmosphere. Extra postage required due to weight.