January 6, 1899.] 



SCIENCE. 



23 



taneous nor reflective cooperation. Not 

 only must there be an agreement of 

 thought, but for most, if not for all, public 

 cooperation there must be a vast mass of 

 sympathies and agreeing emotions. Men 

 must have like sensations, be similarly sen- 

 sitive to suggestion from resembling fellows, 

 and enter subtly into like judgments with- 

 out always being fully conscious of the pro- 

 cess by which their conclusions are reached. 

 The greater part of all public action must 

 be described as a consequence of sympa- 

 thetic and half-reflective agreement in plans 

 and purposes, rather than as a consequence 

 of systematic deliberation Moreover, it 

 must not be forgotten that all public policy 

 is a means to an end, proximate or ulti- 

 mate ; and that the ultimate end in every 

 case is the maintenance and development 

 of a certain type of man. That type itself 

 is a mode of resemblance ; and the recogni- 

 tion of it, which directs and controls all 

 policies, is a mode of the consciousness of 

 kind. Feanklin H. Giddings. 



AT03IIC WEIGHTS. 

 The following table of values is recom- 

 mended for general adoption in analytical 



practice by a commission appointed by the 

 German Chemical Society consisting of H. 

 Landolt, W. Ostwald and K. Seubert. (Ber. 

 d. D. Chem. Ges. 1S9S, 31, 2761.) 

 The commission recommends that : 



1. The atomic weight of oxygen be taken 

 as 16.000, and that the atomic weights of 

 the other elements be calculated on the 

 basis of their combining ratios with oxygen, 

 directly or indirectly determined. 



2. The following atomic weights of the 

 elements be adopted in practice, as they are 

 probably the most correct values known at 

 the present time. 



These numbers are, as a rule, given only 

 with so many decimals that even the last 

 one may be regarded as accurate. In con- 

 sequence, the atomic weights determined 

 by Stas, in which the errors amount to from 

 3 to 6 units in the third decimal, are 

 given with two decimals ; the other atomic 

 weights which have been more accurately 

 determined are given with one decimal, 

 and those less accurately determined are 

 given without decimals. Exceptions to this 

 rule have been made only in the cases of 

 nickel, bismuth and tin, marked with an 

 asterisk in the table. 



Name. Symbol. 



Alumiriium Al 



Antimony Sb 



Argon (?) A 



Arsenic As 



Barium Ba 



Bismuth Bi 



Boron B 



Bromine Br 



Cadmium Cd 



Ceesium Cs 



Calcium Ca 



Carbon C 



Cerium Ce 



Chlorine CI 



Chromium Cr 



Cobalt Co 



Columbium Cb 



Copper Cu 



Erbium (?) Er 



Fluorine F 



Gallium Ga 



Germanium Ge 



Glucinum Gl 



Gold All 



Weiglit. Name. 



27.1 Helium (?) He 



120. Hydrogen H 



40. Indium In 



75. Iodine I 



137.4 Iridium Ir 



208.5* Iron Fe 



11. Lanthanum La 



79.96 Lead Pb 



112. Lithium Li 



133. Magnesium Mg 



40. Manganese Mn 



12.00 Mercury Hg 



140. Molybdenum Mo 



35.45 Neodymium(?) Nd 



52.1 Nickel Ni 



59. Nitrogen N 



94. Osmium Os 



63.6 Oxygen O 



166. Palladium Pd 



19. Phosphorus P 



70. Platinum Pt 



72. Potassium K 



9.1 PriBsodymium (?) .. Pr 



197.2 Rhodium Rh 



Name. 



Symbol. 



4. Rubidium Rb 85.4 



1.01 Ruthenium Ru 101.7 



114. Samarium (?) Sa 150. 



126.85 Scandium Sc 44.1 



193.0 Selenium Se 79.1 



56.0 Silicon Si 28.4 



138. Silver Ag 107.93 



206.9 Sodium Na 23.05 



7.03 Strontium Sr 87.6 



24.36 Sulphur S 32.06 



55.0 Tantalum Ta 183. 



200.3 Tellurium Te 127. 



96.0 Thallium Tl 204.1 



144. Thorium Th 232. 



58.7* Tin Sn 118.5* 



14.04 Titannium Ti 48.1 



191. Tungsten W 184. 



16.00 Uranium U 239.5 



106. Vanadinum V 51.2 



31.0 Ytterbium Yh 173. 



194.8 Yttrium Y 89. 



39.15 Zinc Zn 65.4 



140. Zirconium Zr 90.6 



103.0 



