Of  the  Animalcules
160
another  with  as  much  Briskness  and  Vigour
as  if  the  Cock  had  been  but  newly  dead,  tho
it  was  killed  the  Day  before  :  And  by  several ¬
  Trials  on  the  Semen  of  other  Cocks  it  has
been  found,  that  the  Animalcules  therein
will  live  many  Hours  in  a  capillary  Glaſs
Tube.— -
  To  a  slight  Observer  they  seem  in
the  Form  of  Eels;  but  if  the  greatest  Mag.
nifiers  be  used  with  due  Attention,  they  wil
be  found  ſhaped  as  Fig.  III.  Plate  XII.
Their  Size  is  ſo  extreamly  minute,  that  a
*  Million  of  them  are  supposed  not  to
exceed  the  Bigness  of  a  Grain  of  Sand,  and
their  Tails  cannot  be  discerned  without  much
Difficulty,  being  ten  thousand  times  more
slender  than  the  Hair  of  a  Man's  Hand.
A  little  of  the  Seminal  Matter  taken  from
the  Testicle  of  a  Dog,  abounded  with  Animalcules, ¬
  La  Million  whereof  would  hardly
equal  a  large  Grain  of  Sand:  and  after  some
of  this  Matter  had  been  kept  seven  Days
in  a  Glass  Tube,  several  of  the  Animalcules
remained  alive  and  vigorous.
Their  Form
is  ſhewn  Fig.  IV.
The  Testicles  of  a
Hare,  tho'  tour  Days  dead,  were  also  exceedingly ¬
  full  of  Animalcules  like  thoſe  in
Dogs,  swimming  in  a  clear  Liquor,  but
without  Motion.
Arc.  Nat.  Tom.  II.  Par.  II.  p.  369.
1  Arc.  Nat.  Tom.  I.  Par.  II.  p.  160.
Killing