CHEMISTRY. 



633 



Atomic Weights of the Elements. 



Lochar Meyer and K. Seubert have published a recalculation of the 

 atomic weights of the elements from the original numbers. The values 

 obtained differ but little from those previously published by F. W. Clarke 

 (Constants of Nature, Part V), though they are not all identical. The 

 following table may be usefully reprinted here, since it contains most 

 reliable figures. All values whose possible error lies between 0.01 and 

 0.5 H are denoted by (a). 



Name. 



Symbol, 



Atomic 

 w eight. 



Aluminium . 



Antimony . . 



Arsenic 



Barinm 



Beryllium . . 



Bismuth 



Boron 



Bromine 



Cadmium.. . 



Caesium 



Calcium 



Carbon 



Cerium 



Chlorine.. ^. 



Chromium.. 



Cobalt 



Copper 



Decipium... 



Didymium. . 



firbium 



^Fluorine 



Gallium .... 

 TGold 



Hydrogen ... 



Indium 



Iodine 



Iridium 



Iron 



Lanthanum 



Lead 



Lithium.. ... 



Magnesium . 



Manganese .. 



Mercury 



Molybdenum 



Mosandrium 



Nickel 



Al 



Sb 



As 



Ba 



Be 



Bi 



B 



Br 



Cd 



Cs 



Ca 



C 



Ce 



CI 



Cr 



Co 



Cu 



Dp 



Di 



E 



F 



Ga 



Au 



II 



In 



I 



lr 



Fe 



La 



Pb 



Li 



Mg 



Mn 



Hg 



Mo 



Ms 



Ni 



(a) 27.04 

 119.6 

 (a) 74.9 

 (a) 136. 86 

 (a) 9. 08 

 207. 5 

 (a) 10.9 

 (a) 79.76 

 (a)lll:7 

 (a) 132. 7 

 (a) 39.91 

 (a) 11.97 



141.2 

 (a) 35.37 

 52. 4.') 

 58. 6 

 (a) 63.18 

 • 



146.0 

 166 



(a) 19.06 

 69. 9 

 196. 2 

 (a) 1.00 

 (a) 113. 4 

 (a) 126. 54 

 (a) 192. 5 

 (a) 55.88 



138.5 

 (a) 206. 39 

 (a) 7.01 

 23. 94 

 54.8 

 (a) 199. 8 

 (a) 95.9 



f 

 (a) 58.6 



Name. 



iSymbol. 



Niobium or Coluin 



binm 



Nitrogen 



Norwegium 



Osmium 



Oxygen 



Palladium , 



Phosphorus 



Platiuum 



Potassium 



Rhodium 



Rubidium 



Ruthenium 



Samarium 



Scandium 



Selenium 



Silicon 



Silver 



Sodium 



Strontium 



Sulphur 



Tantalum 



Tellurium 



Terbi um 



Thallium 



Thorium 



Thulium 



Tiu 



Titanium 



Uranium 



Vauadium 



Wolfram (Tungsten) 



Ya and Y/2 



Ytterbium 



Yttrium 



Zinc 



Zirconium 



Atomic 

 weight. 



Nb 



N 



Ng 



Os 



O 



Pd 



P 



Pt 



K 



Rh 



Rb 



Ru 



6a 



Sc 



Se 



Si 



Ag 



Na 



Sr 



S 



Ta 



Te 



Tb 



Tl 



Th 



Tn 



Su 



Ti 



U 



V 



w 



Yb 

 Y 

 Zn 

 Zr 



93.7 

 (a) 14.01 

 ? 

 195 

 (a) 15.96 



106. 2 

 (a) 30.96 

 (a) 194. 3 

 (a) 39.03 



104. 1 

 (a) H5.2 

 103.5 

 *1 

 (a) 43.97 

 78.87 

 26.0 

 (a) 107. 66 

 (a) 22.995 

 (a) 87.3 

 («) 31.98 

 18* 

 tl27.7 



203. 7 

 231.96 



117.35 

 50.25 

 239. 8 

 (a) 51.1 

 (a) 183. 6 

 ? 

 172.6 

 89.6 

 64.88 

 90.4 



See determination in preceding pages. 



t Perhaps Te = 126.3. 



Experiments at remarkably low Temperatures ; Solidification of Alco- 

 hol and of Nitrogen. — The long-recognized distinction between oondensi- 

 ble vapors and permanent gases was forever abolished in December, 

 1877, by the memorable experiments of Messrs. Cailletet and Raoul Pic* 

 tet. These gentlemen, working independently and with different ap- 

 pliances, succeeded, it will be remembered, in liquefying oxygen, nitro- 

 gen, and even hydrogen, in glass tubes. Since that date S. Wroblewaki 



