178  Spelling,  etc.,  of  Chemical  Terms.  {^SS^SST^' 
cium  chloride  tubes  were  then  attached  before  the  occlusion  tube, 
and  a  potash  apparatus  to  observe  the  rapidity  of  the  gas ;  the 
oxygen  was  displaced  by  air,  and  this,  again,  after  cooling,  by  nitro- 
gen. After  the  current  has  passed  for  half  an  hour,  hydrogen  was 
introduced  and  heat  was  applied.  The  water  formed  was  received 
in  the  calcium  chloride  tubes,  which  were  weighed  after  they  had 
been  successively  traversed  by  nitrogen  and  air. 
Silver  on  being  thus  treated  absorbed  4-09  vols.,  which  does  not 
agree  badly  with  Graham's  result,  according  to  which  from  615  to 
7-4  vols,  were  absorbed. 
Gold  absorbed  48*49  vols,  of  oxygen,  whilst  Graham  observed  no 
absorption.  Neumann  believes  that  this  difference  may  be 
explained  by  the  temperature  of  the  experiment. 
In  case  of  platinum,  concerning  the  absorptive  power  of  which 
for  oxygen  there  is  much  discrepancy  among  former  observers,  Neu- 
mann found  occlusion  of  77  14  vols.  With  palladium  the  author 
found  a  formation  of  sub-oxide,  since  the  residue  after  treatment 
with  oxygen  contained  6-99  per  cent.,  whilst  Pd20  contains  7-33  per 
cent. 
Neumann  considers  that  the  absorptions  of  oxygen  depend  on  a 
power  of  the  metals  to  become  oxidized  at  about  4500,  the  temper- 
ature of  the  experiment. — Zeit.  Anal.  Chemie,  vol.  xxxii,  p.  72; 
Chem.  Nezvs,  March  10,  1893. 
RULES  FOR  THE  SPELLING  AND  PRONUNCIATION  OF 
CHEMICAL  TERMS. 
The  American  Association  for  the  Advancement  of  Science,  at  its 
meeting  in  1887,  appointed  a  committee  to  consider  the  question  of 
attaining  uniformity  in  the  spelling  and  pronunciation  of  chemical 
terms.  The  work  required  extensive  correspondence  and  detailed 
discussion,  extending  over  four  years,  when  in  1 891  the  following 
rules  were  adopted  by  the  Association  and  recommended  to  chemists 
generally,  but  especially  to  those  engaged  in  teaching,  in  the  hope 
that  they  will  cordially  unite  in  the  efforts  to  bring  about  uniformity 
in  usage.  The  committee  consisted  of  T.  H.  Norton,  Ph.D.,  Profes- 
sor of  Chemistry,  University  of  Cincinnati ;  Edward  Hart,  Ph.D., 
Professor  of  Chemistry,  Lafayette  College,  Easton,  Pa. ;  H.  Carring- 
