ATHEROMA 



24 



AUER BODIES 



in the body (Jailer, J. W., Science, 

 1945, 102, 258-259. 

 Atheroma, see methods for Calcium, CoUa- 

 genic Fibers, Elastic Fibers, Lipids, 



Atomic' Weights. See G. E. F. Lundell, 

 Chairman, Report of Committee on 

 Atomic Weights. J. Am. Chem. Soc, 

 1949, 71, 1141-1142. 



International Atomic Weights 

 1949 Revision 



Actinium Ac 227 



Aluminum Al 26.97 



Americium Am [241] 



Antimony Sb 121.76 



Argon A 39.944 



Arsenic As 74.91 



Astatine At [210] 



Barium Ba 137.36 



Beryllium Be 9.013 



Bismuth Bi 209.00 



Boron B 10.82 



Bromine Br 79.916 



Cadmium Cd 112.41 



Calcium Ca 40.08 



Carbon C 12.010 



Cerium Ce 140.13 



Cesium Cs 132.91 



Chlorine CI 35.457 



Chromium Cr 52.01 



Cobalt Co 58.94 



Columbium (see Niobium) 



Copper Cu 63.54 



Curium Cm [242] 



Dysprosium Dy 162.46 



Erbium Er 167.2 



Europium Eu 152.0 



Fluorine F 19.00 



Francium Fr [223] 



Gadolinium Gd 156.9 



GalUum Ga 69.72 



Germanium Ge 72.60 



Gold Au 197.2 



Hafnium Hf 178.6 



Helium He 4.003 



Holmium Ho 164.94 



Hydrogen H 1.0080 



Indium In 114.76 



Iodine I 126.92 



Iridium Ir 193.1 



Iron Fe 55.85 



Krypton Kr 83.7 



Lanthanum La 138.92 



Lead Pb 207.21 



Lithium Li 6.940 



Lutetium Lu 174.99 



Magnesium Mg 24.32 



Manganese Mn 54.93 



Mercury Hg 200.61 



Molybdenum Mo 95.95 



Neodymium Nd 144.27 



Neptunium Np [237] 



Neon Ne 20.183 



Nickel Ni 58.69 



Niobium Nb 92.91 



Nitrogen N 14.008 



Osmium Os 190.2 



Oxygen O 16.0000 



Palladium Pd 106.7 



Phosphorus P 30.98 



Platinum Pt 195.23 



Plutonium Pu [239] 



Polonium Po 210 



Potassium K 39.096 



Praseodymium Pr 140.92 



Promethium Pm [147] 



Protactinium Pa 231 



Radium Ra 226.05 



Radon Rn 222 



Rhenium Re 186.31 



Rhodium Rh 102.91 



Rubidium Rb 85.48 



Ruthenium Ru 101.7 



Samarium 8m 150.43 



Scandium Sc 45. 10 



Selenium Se 78.96 



Silicon Si 28.06 



Silver Ag 107.880 



Sodium Na 22.997 



Strontium Sr 87.63 



Sulfur S 32.066 



Tantalum Ta 180.88 



Technetium Tc [99] 



Tellurium Te 127.61 



Terbium Tb 159.2 



Thallium Tl 204.39 



Thorium Th 232. 12 



Thulium Tm 169.4 



Tin Sn 118.70 



Titanium Ti 47.90 



Tungsten (see Wolfram) 



Uranium U 238.07 



Vanadium V 50.95 



Wolfram W 183.92 



Xenon Xe 131.3 



Ytterbium Yb 173.04 



Yttrium Y 88.92 



Zinc Zn 65.38 



Zirconium Zr 91.22 



A value given in brackets denotes the mass number 

 of the most stable known isotope. 



Auditory System, see Ear. 



Auer Bodies. — Written by G. Adolph Acker- 

 man, Hinsman Hall, Ohio State Uni- 

 versity, Columbus 10, Ohio. May 24, 

 1951 — Auer bodies are rod-like struc- 

 tures occasionally present in the cyto- 

 plasm of leukemic myelocytes and 

 monocytes; they are less than 1 micron 

 in width and vary in length from 1-10 

 micra. Although the number of Auer 

 bodies observed within a single leukemic 

 cell is frequently limited to one or two, 

 more than fifteen have been observed. 

 Auer bodies are formed bj' the coas- 

 cervation of the cytoplasmic granules 

 in young leukemic cells. As the cell 

 matures, the Auer bodies undergo dis- 

 solution into cytoplasmic granules. 



