﻿88 
  Scientific 
  Intelligence. 
  

  

  the 
  supposed 
  markings 
  of 
  Mercury 
  and 
  Venus, 
  and 
  j>hotographs 
  

   of 
  sucli 
  meclianisms 
  as 
  the 
  bolometer 
  in 
  a 
  water-jacket 
  and 
  the 
  

   40-foot 
  liorizontal 
  i)]ioto-heliograph 
  in 
  its 
  shed 
  — 
  the 
  view 
  being- 
  

   taken 
  from 
  outside 
  tlie 
  shed. 
  

  

  Such 
  superfluities 
  do 
  not 
  detract 
  from 
  the 
  value 
  of 
  the 
  book, 
  

   which 
  is 
  crowded 
  with 
  varied 
  information 
  most 
  attractively 
  pre- 
  

   sented, 
  w. 
  B. 
  

  

  7. 
  Elements 
  of 
  Practical 
  Astronomy 
  ; 
  by 
  W. 
  W. 
  Campheli., 
  

   Lick 
  Observatory 
  ; 
  pp. 
  264. 
  New 
  York, 
  1868. 
  (Macmillan 
  cV:Co.) 
  

   Based 
  on 
  lectures 
  delivered 
  at 
  Michigan 
  University. 
  A 
  very 
  

   clear 
  and 
  scientific 
  presentation 
  of 
  as 
  much 
  of 
  the 
  subject 
  as 
  is 
  

   possible 
  or 
  desirable 
  in 
  training 
  students 
  upon 
  the 
  fundamental 
  

   principles 
  of 
  telescopic 
  measurements. 
  w. 
  w. 
  

  

  8. 
  An 
  Introduction 
  to 
  the 
  Mathematical 
  Theory 
  of 
  Attrac- 
  

   tion 
  ; 
  by 
  Francis 
  A. 
  Tarleton, 
  Professor 
  of 
  Natural 
  Philosophy 
  

   in 
  the 
  University 
  of 
  Dublin 
  ; 
  pp. 
  290. 
  New 
  York, 
  1899. 
  (Long- 
  

   mans, 
  Green 
  & 
  Co.) 
  The 
  theory 
  of 
  attraction, 
  which 
  had 
  its 
  

   origin 
  in 
  physical 
  astronomy, 
  now 
  finds 
  its 
  more 
  difficult 
  and 
  

   important 
  uses 
  in 
  electricity 
  and 
  magnetism. 
  As 
  the 
  author 
  

   points 
  out 
  in 
  his 
  preface, 
  the 
  theory 
  of 
  fluid 
  motion, 
  investigated 
  

   with 
  such 
  far-reaching 
  results 
  by 
  Helmholtz, 
  Thomson 
  and 
  

   Stokes, 
  has 
  its 
  leading 
  problems 
  mathematically 
  the 
  same 
  as 
  prob- 
  

   lems 
  in 
  the 
  theory 
  of 
  attraction. 
  The 
  present 
  text-book 
  gives 
  

   adequate 
  treatment 
  of 
  the 
  theory 
  in 
  its 
  applications 
  to 
  these 
  lines 
  

   of 
  research. 
  w. 
  b. 
  

  

  9. 
  Ixs 
  Variations 
  de 
  Longueur 
  des 
  Glaciers 
  dans 
  les 
  Regions 
  

   Arctiques 
  et 
  Boreales 
  ; 
  by 
  Charles 
  Rabot. 
  — 
  In 
  the 
  number 
  of 
  

   this 
  Journal 
  for 
  November, 
  1897, 
  an 
  abstract 
  was 
  given 
  of 
  the 
  

   first 
  part 
  of 
  a 
  memoir 
  on 
  the 
  above 
  subject, 
  published 
  under 
  the 
  

   auspices 
  of 
  the 
  Commission 
  LUernationale 
  des 
  Glaciers. 
  The 
  

   opening 
  portion 
  of 
  the 
  second 
  part 
  is 
  now 
  published 
  in 
  the 
  num- 
  

   ber 
  of 
  the 
  Bihliotheque 
  Cfniverselle 
  for 
  April 
  15th. 
  It 
  is 
  chiefly 
  

   occupied 
  by 
  a 
  discussion 
  of 
  the 
  glaciers 
  of 
  Spitzbergen 
  as 
  observed 
  

   by 
  various 
  explorers, 
  and 
  gives 
  many 
  interesting 
  facts 
  in 
  regard 
  

   to 
  this 
  remote 
  region. 
  

  

  10. 
  Tlie 
  Odonata 
  of 
  Ohio; 
  by 
  David 
  S. 
  Kellicott, 
  Ph.D. 
  

   pp. 
  116. 
  Columbus, 
  1899. 
  Ohio 
  State 
  University. 
  Contribu- 
  

   tions 
  from 
  the 
  Department 
  of 
  Zoology 
  and 
  Entomology. 
  No. 
  1. 
  — 
  

   This 
  valuable 
  paper 
  by 
  the 
  late 
  Professor 
  Kellicott 
  (died 
  April 
  

   13, 
  1898) 
  has 
  recently 
  been 
  issued. 
  It 
  has 
  been 
  edited 
  by 
  Mr. 
  

   J. 
  S. 
  Hine, 
  who 
  has 
  completed 
  the 
  parts 
  of 
  the 
  manuscript 
  left 
  

   unfinished 
  ; 
  he 
  has 
  also 
  added 
  a 
  sketch 
  of 
  the 
  author's 
  life 
  and 
  a 
  

   bibliography. 
  The 
  drawings 
  have 
  been 
  made 
  by 
  Mr. 
  W. 
  E. 
  

   Kellicott. 
  

  

  11. 
  Electricity 
  in 
  Tow)i 
  and 
  Country 
  Houses 
  ; 
  by 
  Percy 
  E. 
  

   ScRUTTON. 
  Second 
  edition, 
  pp. 
  148. 
  Westminster, 
  1898. 
  (Archi- 
  

   bald 
  Constable 
  it 
  Co.) 
  — 
  This 
  little 
  volume, 
  of 
  which 
  a 
  second 
  

   edition 
  is 
  now 
  issued, 
  gives 
  an 
  account 
  of 
  the 
  methods 
  em])loyed 
  

   in 
  installing 
  electricity 
  in 
  houses, 
  with 
  numerous 
  i)ractical 
  illus- 
  

   trations. 
  Besides 
  the 
  ai)plication 
  of 
  electricity 
  to 
  lighting, 
  it 
  

   also 
  discusses 
  briefly 
  some 
  of 
  the 
  various 
  other 
  uses, 
  as 
  a 
  motor, 
  

   etc., 
  to 
  which 
  it 
  is 
  ada})ted. 
  

  

  