[ J A N U A R Y , 1905.1
VOl. XXVII.
No.
I.
THE J O U R N A L O F THE
American Chemical Society REPORT OF T H E INTERNATIONALCOMMITTEE ON ATOMIC W EICi HTS. Received Sovember
14,
1904
'I'iIE International Committee on _Atomic IYeights respectfully
submits the following report, together with a table of atomic iveights for use during I T j . Most of the values recommended in our table are identical with those reported in former years, but a few changes seem to be needed. Other changes, which are suggested by recent investigations, are deferred until fuller information regarding their desirability shall have been received. During 1904 there has been great activity in the tlttermiiiation of atomic weights : and a summary of the more important researches may help to explain our reasons for changing or retaining hitherto accepted values. The re-. searches to be considered are as follows : GlihzlIiz.-'rhe atomic weight has been retletermined by Parsons.1 Seven analyses of the acetylacetonate gave, in mean, G1 = 9.113.Sine analyses of the hasic acetate gave exactly the same average. , i s the individual determinations range from 9.081 to 9.142, the figure 9.1 may evidently remain unchanged. Iizdiiim-The investigation by Thiel* shows that the atomic \\eight of indium is higher than hat1 been supposed. -\iialyses of 1 ?
Thi? Journal, 26, j 2 1 Z k h ? awoiu C h m ~ , 40,
zq0.
t!~e trichloride gave. in iiieaii, lii =
I I 3.05.
Aiial! bromide gave I r l . S ~ . \\-it11 the oxide? unsatisfactory results were iilitaiiietl. For present purposes tlie i-ouiitl iiiuii1)et- I 15 ma!- be adoptetl. althnugii hii-ther iiivc
