﻿Report 
  of 
  the 
  President 
  1 
  9 
  

  

  that 
  its 
  general 
  interest 
  and 
  instructive 
  value 
  have 
  been 
  much 
  

   increased. 
  The 
  sun 
  is 
  represented 
  by 
  an 
  illuminated 
  globe 
  

   three 
  inches 
  in 
  diameter, 
  while 
  minute 
  incandescent 
  bulbs 
  of 
  

   proper 
  comparative 
  size 
  are 
  suspended 
  at 
  relative 
  distances 
  

   from 
  the 
  sun 
  and 
  correspond 
  to 
  the 
  various 
  planets. 
  The 
  

   orbit 
  of 
  each 
  planet 
  is 
  shown 
  by 
  means 
  of 
  a 
  thin 
  metal 
  strip, 
  

   on 
  which 
  is 
  indicated 
  the 
  space 
  traversed 
  by 
  the 
  earth 
  for 
  

   each 
  day 
  of 
  the 
  year. 
  

  

  On 
  the 
  second 
  floor 
  has 
  been 
  placed 
  a 
  model 
  illustrating 
  

   the 
  diurnal 
  and 
  annual 
  movements 
  of 
  our 
  planet. 
  The 
  light 
  

   and 
  heat 
  of 
  the 
  sun 
  are 
  represented 
  by 
  a 
  strong 
  beam 
  of 
  light 
  

   focused 
  on 
  the 
  earth 
  by 
  means 
  of 
  a 
  stereopticon 
  lantern. 
  

   The 
  earth 
  is 
  shown 
  by 
  a 
  globe 
  four 
  feet 
  in 
  diameter, 
  which 
  

   makes 
  a 
  yearly 
  revolution 
  in 
  its 
  orbit, 
  following 
  the 
  months 
  

   indicated 
  on 
  a 
  railing 
  which 
  lies 
  in 
  and 
  marks 
  the 
  plane 
  of 
  the 
  

   ecliptic. 
  The 
  earth, 
  moreover, 
  rotates 
  on 
  its 
  own 
  axis, 
  making 
  

   one 
  revolution 
  a 
  day. 
  Clockwork, 
  regulated 
  by 
  a 
  pendulum 
  

   that 
  swings 
  once 
  every 
  second, 
  controls 
  the 
  movements 
  of 
  the 
  

   model 
  and 
  the 
  directions 
  of 
  rotation 
  and 
  revolution. 
  The 
  

   location 
  of 
  the 
  earth 
  in 
  its 
  orbit 
  on 
  any 
  day 
  of 
  the 
  year 
  and 
  

   the 
  inclination 
  of 
  the 
  earth's 
  axis 
  are 
  represented 
  as 
  they 
  

   occur 
  in 
  the 
  heavens. 
  

  

  These 
  two 
  exhibits 
  are 
  an 
  attempt 
  to 
  illustrate 
  a 
  branch 
  of 
  

   science 
  which 
  heretofore 
  has 
  not 
  been 
  included 
  within 
  the 
  scope 
  

   of 
  the 
  Museum, 
  but 
  the 
  interest 
  taken 
  in 
  the 
  models 
  by 
  the 
  

   general 
  visitor 
  and 
  the 
  practical 
  use 
  made 
  of 
  them 
  by 
  teachers 
  

   are 
  sufficient 
  evidence 
  that 
  in 
  the 
  future 
  development 
  of 
  the 
  

   Museum 
  this 
  work 
  might 
  be 
  extended 
  and 
  a 
  hall 
  devoted 
  

   exclusively 
  to 
  the 
  science 
  of 
  cosmology. 
  

  

  Museum 
  Extension 
  to 
  the 
  Schools. 
  — 
  This 
  work 
  is 
  car- 
  

   ried 
  on 
  under 
  our 
  Department 
  of 
  Public 
  Instruction. 
  By 
  

   many 
  teachers 
  the 
  nature-study 
  collections, 
  regularly 
  dis- 
  

   tributed 
  by 
  the 
  Museum, 
  are 
  regarded 
  as 
  indispensable 
  adjuncts 
  

   to 
  their 
  equipment 
  for 
  teaching, 
  and 
  when 
  it 
  is 
  taken 
  into 
  

   consideration 
  that 
  the 
  collections 
  are 
  loaned 
  only 
  on 
  applica- 
  

   tion 
  of 
  the 
  teacher, 
  the 
  following 
  statistics 
  may 
  be 
  taken 
  as 
  

   an 
  indication 
  of 
  the 
  direct 
  utility 
  of 
  this 
  branch 
  of 
  work. 
  

  

  During 
  the 
  year, 
  484 
  cabinets 
  have 
  been 
  in 
  circulation; 
  

   practically 
  every 
  month 
  383 
  schools 
  in 
  Greater 
  New 
  York 
  

  

  