﻿222 
  Scientific 
  Intelligence. 
  

  

  psychological 
  methods, 
  receptors 
  and 
  their 
  stimuli, 
  neuro-phy- 
  

   siological 
  basis 
  of 
  action, 
  and 
  the 
  responses 
  of 
  muscles 
  and 
  

   glands. 
  Then 
  follow 
  chapters 
  on 
  the 
  hereditary 
  modes 
  of 
  

   response, 
  emotions, 
  instinct, 
  genesis 
  and 
  retention 
  of 
  explicit 
  

   and 
  implicit 
  language 
  habits. 
  The 
  last 
  80 
  pages 
  treat 
  of 
  the 
  

   organism 
  at 
  work 
  and 
  of 
  the 
  personality 
  and 
  its 
  disturbance. 
  

   The 
  book 
  can 
  hardly 
  fail 
  to 
  appeal 
  to 
  the 
  interest 
  and 
  imagina- 
  

   tion 
  of 
  the 
  student, 
  for 
  the 
  greater 
  part 
  of 
  the 
  abstract 
  reasoning 
  

   characteristic 
  of 
  so 
  many 
  of 
  its 
  predecessors 
  is 
  replaced 
  by 
  the 
  

   experimental 
  evidence 
  on 
  which 
  the 
  conclusions 
  are 
  based. 
  In 
  

   place 
  of 
  a 
  multitude 
  of 
  technical 
  definitions 
  to 
  be 
  memorized 
  

   (and 
  later 
  forgotten) 
  the 
  reader 
  finds 
  common 
  sense 
  explana- 
  

   tions 
  of 
  mental 
  phenomena 
  applicable 
  to 
  his 
  daily 
  life, 
  appre- 
  

   ciation 
  of 
  which 
  will 
  give 
  him 
  a 
  better 
  understanding 
  both 
  of 
  

   himself 
  and 
  of 
  his 
  associates. 
  w. 
  R. 
  c. 
  

  

  8. 
  A 
  Laboratory 
  Outline 
  of 
  Embryology 
  ; 
  with 
  Special 
  Ref- 
  

   erence 
  to 
  the 
  Chick 
  and 
  the 
  Pig; 
  by 
  Frank 
  R. 
  Lillie 
  and 
  Carl 
  

   R. 
  Moore 
  ; 
  pp. 
  ix, 
  66. 
  Chicago, 
  1919 
  (University 
  of 
  Chicago 
  

   Press). 
  — 
  Concise 
  laboratory 
  directions 
  for 
  the 
  comparative 
  

   study 
  of 
  the 
  separate 
  organ 
  systems 
  of 
  these 
  two 
  animals; 
  par- 
  

   ticularly 
  suitable 
  for 
  the 
  embryological 
  courses 
  in 
  medical 
  

   schools. 
  w. 
  r. 
  c. 
  

  

  9. 
  The 
  Cactacece: 
  Descriptions 
  and 
  Illustrations 
  of 
  Plants 
  

   of 
  the 
  Cactus 
  Family. 
  Volume 
  I 
  ; 
  by 
  N. 
  L. 
  Britton 
  and 
  J. 
  N. 
  

   Rose. 
  Pp. 
  vii, 
  236 
  ; 
  36 
  plates 
  (27 
  colored) 
  and 
  301 
  text 
  figures. 
  

   Washington, 
  1919 
  (The 
  Carnegie 
  Institution, 
  Publication 
  No. 
  

   248, 
  Vol. 
  I). 
  Our 
  knowledge 
  of 
  an 
  exceedingly 
  difficult 
  group 
  

   of 
  plants 
  is 
  materially 
  increased 
  by 
  this 
  careful 
  and 
  exhaustive 
  

   contribution. 
  The 
  Cactaceas, 
  with 
  but 
  few 
  exceptions, 
  are 
  

   natives 
  of 
  America, 
  attaining 
  their 
  best 
  development 
  in 
  the 
  more 
  

   arid 
  portions 
  of 
  the 
  tropics. 
  A 
  few, 
  however, 
  extend 
  into 
  higher 
  

   latitudes, 
  both 
  northern 
  and 
  southern, 
  and 
  the 
  well-known 
  

   Indian 
  fig 
  has 
  become 
  widely 
  naturalized 
  in 
  southern 
  Europe 
  

   and 
  other 
  parts 
  of 
  the 
  world. 
  The 
  present 
  work 
  is 
  based 
  on 
  a 
  

   study 
  of 
  more 
  than 
  fifteen 
  years, 
  and 
  the 
  authors 
  or 
  their 
  agents 
  

   have 
  visited 
  all 
  the 
  more 
  important 
  cactus 
  areas 
  in 
  both 
  North 
  

   and 
  South 
  America. 
  They 
  have 
  also 
  examined, 
  wherever 
  pos- 
  

   sible, 
  the 
  type 
  specimens 
  of 
  described 
  species 
  and 
  have 
  brought 
  

   together 
  large 
  collections 
  of 
  greenhouse 
  and 
  herbarium 
  mate- 
  

   rial. 
  They 
  divide 
  the 
  family 
  into 
  the 
  following 
  three 
  tribes: 
  

   the 
  Pereskige, 
  characterized 
  by 
  stalked 
  flowers, 
  broad 
  flat 
  leaves, 
  

   and 
  a 
  lack 
  of 
  glochids 
  or 
  barbed 
  hairs; 
  the 
  Opuntieaa, 
  having 
  

   sessile 
  flowers, 
  an 
  abundance 
  of 
  glochids, 
  and 
  usually 
  minute 
  

   fugacious 
  leaves; 
  and 
  the 
  Cereeae, 
  in 
  which 
  sessile 
  flowers 
  are 
  

   present 
  but 
  neither 
  glochids 
  nor 
  leaves. 
  In 
  the 
  present 
  volume 
  

   only 
  the 
  first 
  two 
  tribes 
  are 
  treated, 
  leaving 
  the 
  extensive 
  Cereese 
  

   for 
  the 
  succeeding 
  volumes 
  (of 
  which 
  three 
  are 
  promised). 
  The 
  

   Pereskiese 
  includes 
  the 
  single 
  genus 
  Pereskia, 
  of 
  which 
  19 
  spe- 
  

  

  