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Practical  Talks  by  an  Astronomer 

Harold  Jacoby 

The  present  volume  has  not  been  designed  as  a systematic  treatise  on  astronomy. 
There  are  many  excellent  books  of  that  kind,  suitable  for  serious  students  as  well 
as  the  general  reader;  but  they  are  necessarily  somewhat  dry  and  unattractive, 
because  they  must  aim  at  completeness.  Completeness  means  detail,  and  detail 
means  dryness. 

But  the  science  of  astronomy  contains  subjects  that  admit  of  detached  treatment; 
and  as  many  of  these  are  precisely  the  ones  of  greatest  general  interest,  it  has 
seemed  well  to  select  several,  and  describe  them  in  language  free  from 
technicalities.  It  is  hoped  that  the  book  will  thus  prove  useful  to  persons  who  do  not 
wish  to  give  the  time  required  for  a study  of  astronomy  as  a whole,  but  who  may 
take  pleasure  in  devoting  a half-hour  now  and  then  to  a detached  essay  on  some 
special  topic. 


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