Four  bulletins  have  been  issued  in  a  technical  series  in  which  have
been  placed  on  record  some  of  the  results  of  a  technical  character
incidental  to  the  investigations  of  the  stjition.  The  leading  object  in
view  in  these  bulletins  has  been  the  collection  of  material  which  may
ultimately  be  utilized  in  a  biological  survey  of  the  State.  These
studies  have  thus  far  included,  among  others,  contributions  to  the  life
history  of  certain  plant  lice;  a  descriptive  catalogue  of  the  shells  of
Fi'anklin  County,  Ohio;  studies  on  the  methods  of  oviix)sition  in  the
Tipulidte;  descriptions  of  a  number  of  species  of  Diptera  and  Hyme-
noptera  and  a  species  of  ("hlorops;  observations  on  a  number  of  new
and  rare  Ohio  plants  and  their  distribution;  a  preliminary  list  of  the
Uredinece  of  Ohio,  and  a  catalogue  of  the  Erysiphero  of  the  State.
Observations  have  been  made  on  the  germination  of  seeds  treated  with
various  chemicals.
DISSEMINATION  OF   INFORMATION.
During  the  first  six  years  of  the  existence  of  the  Ohio  Station  its
permanent  publications  were  limited  to  its  annual  reports,  such  bulletins
as  were  issued  being  intended  only  ^s  advance  reports  for  the  use  of
the  press.  Their  substance  was  afterwards  incorporated  in  the  annual
reports,  and  no  complete  file  of  these  bulletins  has  been  preserved.
Beginning  with  the  reorganization  under  the  act  of  Congress,  the
bulletins  were  given  a  more  permanent  character,  those  for  1888,
however,  being  incorporated  in  the  seventh  annual  report.  For
1889,  1890,  1891,  and  part  of  1892  the  bulletins  were  numbered  in
annual  volumes  only,  but  with  number  42  consecutive  numbering  was
begun  and  has  since  been  maintained,  the  last  issue  being  No.  113.
