JANUARY. 1915 . Vol . XL. No . 466 . Aluminium Argon . Barium . Bismuth . Boron . Bromine . Cadmium . Caeeiurn . Calcium . Carbon . Cerium . Chlorine . Chromium Cobalt . Columbium Copper . Dysprosium Erbium . Fluorine . Gadolinium Gallium . Germanium Glucinum . Gold . Helium . Holmium . Hydrogen . Indium . Iodine . Iridium . Antimony . Arsenic . Europium . . lron . Krypton . Lanthanum Lead . Lithium . Luteciurn . Magnesium Mmganese Mercury . THE ANALYST . INTERNATIONAL ATOMIC WEIGHTS. 1915 . . . . . . . . . . I . . . . . . . . . . . I . . . . . . . . . . . . . . I . . . . . . . . . . 0 = 16 . . A1 27.1 . Sb 120.2 . A 39.88 .As 74-96 . Ba 137.37 . Bi 208.0 B 11.0 . Br 79.92 . Cd 112.40 . Cs 132.81 . Ca 40.07 . c 12.00 . Ce 140.25 . C1 35.46 . Cr 52.0 . Co 58-97 . Cb 93.5 . Cu 63-57 . Dy 162.5 . Er 167.7 . Eu 152.0 . F 19.0 . Gd 157.3 . Ga 69.9 . Ge 72.5 . G1 9.1 . Au 197.2 . He 3-99 . Ho 163.5 . H 1408 . I n 114.8 . I 126.92 . Ir 193-1 . Fe 55.84 . . . Kr 82.92 . La 139.0 . Pb 207.10 . Li 6.94 . Lu 174.0 . Mn 54.93 . Hg 200.6 . Mg 24.32 0=16 . Molybdenum . . MO 96.0 Neodymium . . Nd 144.3 Neon . . . Ne 20.2 Nickel . . Ni 58.68 Niton (radium embmtion) N t 222.4 Nitrogen . . Osmium . . Oxygen . 1 Palladium . Phosphorus . Platinum . . Potassium . Praseodymium . Radium- . Rhodium . Rubidium Ruthenium Samarium Scandium Selenium .Silicon . Silver . Sodium . Strontium Tantalum Tellurium Terbium . Thallium . Thorium . Thulium . Tin . Titanium . Tungsten . Uranium . Vanadium Xenon . Sulphur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N os 0 Pd P P t K Pr R& Rh Rb RU S& s c Se Si Ag Na Sr S Ta Te Tb T1 Th Tm Sn Ti W U V Xe 14.01 16.00 31.04 39.10 190.9 106-7 195.2 140.6 226-4 102-9 101.7 150.4 44.1 79-2 28.3 107.88 23-00 87.63 32-07 85 -45 181.5 127.5 159.2 204.0 232.4 168.5 119.0 48.1 184.0 238.5 51.0 130.2 Ytterbium (Neoytterbium) Yb 172.0 Yttrium . . Yt 89-0 Zinc . . . Zn 65-37 Zirconium . . Zr 90.6