Oct.  1900.  Annual  Report  of  the  Director. 
449 
added  and  the  whole  fully  labeled.  The  interiors  of  several  cases  in 
this  hall  have  been  repainted.  The  collection  of  rocks  of  the  Saar- 
brucken  coal  fields  has  been  transferred  to  Hall  70  (coals  and  hydro- 
carbons). The  use  of  a  base  for  the  installation  of  this  collection 
which  slopes  from  the  center  to  two  sides  of  the  case  has  proved 
most  satisfactory  in  the  way  of  securing  good  lighting  of  the  speci- 
mens. It  is  intended  to  substitute  frequently  such  bases  fur  the 
pyramids  hitherto  employed.  In  the  place  left  vacant  in  Hall  66  by 
removal  of  the  above-mentioned  collection,  the  collection  of  rocks 
accompanying  the  iron  ores  of  Lake  Superior  has  been  installed. 
The  large  mao  in  Hall  62,  showing  localities  of  meteorite  falls  in  the 
United  States,  has  been  brought  up  to  date.  New  relief  maps 
obtained  by  gift  or  purchase  have  been  placed  in  position  in  Hall  60, 
space  for  their  exhibition  being  secured  by  the  removal  of  several 
wall  maps  which  had  less  value.  The  collection  of  dinosaur  bones 
made  by  the  Wyoming  Expedition  of  last  year  was  cleared  from  the 
matrix  and  made  ready  for  exhibition  during  the  winter  months.  To 
provide  for  exhibition  of  the  specimens,  additional  floor  cases  were 
placed  in  both  Halls  36  and  59,  as  well  as  a  base  formounting  a  hind 
leg.  The  specimens  of  Dinosaur  remains  now  on  exhibition  in 
these  halls  include  a  hind  leg  and  portion  of  the  pelvic  girdle  of 
Morosaui'us ;  a  series  of  sixteen  caudal  vertebrae,  reaching  a  total 
length  of  fifteen  feet,  of  Diplodocus ;  a  scapula  and  coracoid  over  five 
feet  in  length  of  Morosaurus ;  a  femur  of  Diplodocus  of  about  the  same 
length  and  many  miscellaneous  vertebrae  and  pelvic  and  leg  bones  of 
Diplodocus,  Brontosaurus  and  Creosaurus.  A  large  slab  of  reptile 
tracks  from  Turner's  Falls,  Massachusetts,  has  been  framed  to  insure 
its  preservation,  and  placed  in  position  in  Hall  36.  The  exteriors  of 
the  floor  cases  in  Hall  35  have  been  repainted.  The  laboratory  of 
vertebrae  paleontology  has  been  enlarged  by  adding  to  it  space 
formerly  occupied  by  the  departmental  library,  the  book-cases  from 
the  latter  having  been  transferred  to  the  office.  The  equipment  of 
this  laboratory  has  been  further  increased  by  the  addition  of  a  turn- 
ing lathe,  bench,  and  sink  with  running  water.  To  the  departmental 
store-room  a  stack  of  storage  trays  and  a  mineral  trimmer  have  been 
added,  the  latter  proving  especially  serviceable.  The  temporary 
sheet  iron  stack  leading  from  the  furnace  to  the  assay  room  having 
become  worn  out,  a  permanent  brick  stack  has  been  constructed.  At 
the  same  time  a  solid  stone  floor  was  laid  and  a  new  pot  furnace  for 
making  small  crucible  assays  built."  The  Curator  of  the  Department 
of  Botany  in  the  prosecution  of  his  notable  work  in  the  herbarium, 
extensions  to  which  have  been  necessary  during  the  year,  says  : 
