Velocities  of  Cannon  Balls , See.  69 
the  experiments  of  this  day  are  doubtful,  as  indeed  is 
evident  from  their  irregularity,  on  account  of  the  wind 
blowing  the  tape,  which  was  not  very  properly  fecured 
by  the  little  brazen  machine  through  which  it  was  made 
to  Hide. 
The  powder  was  taken  from  the  bottom  of  a barrel, 
and  the  charges  rammed  a little  clofer  than  thofe  of  the 
former  day;  and  fo  tight  did  the  fhots  fit  towards  the 
breech,  that  many  flrokes  of  the  rammer  were  neceflary 
to  drive  them  home. 
The  fourth  and  fifth  fhots  were  of  a long  form,  which 
may  be  called  fpherico-cylindrical,  as  they  were  cylinders 
terminated  by  hemifpherical  ends,  fo  that  their  fedtion 
through  the  axis  was  of  this  form  O,  and  the  length  of 
the  axis  was  near  double  the  diameter  of  the  fhot. 
The  fourth  fhot,  or  fir  ft  of  the  long  fort,  flruck  fide- 
ways,  making  a hole  of  the  fhape  of  the  above  fedtion, 
only  its  length  or  axis  was  not  horizontal  but  vertical, 
thus  Q. 
The  lafl  fhot  lay  obliquely  in  the  wood;  it  appeared 
to  have  flruck  with  its  end  foremofl,  or  nearly  fo,  as  the 
oblique  pofition  in  which  it  lay  feemed  to  be  caufed  by 
its  flriking  againfl  a former  fhot  lodged  in  the  wood, 
with  the  hance  of  its  end,  fo  as  to  flatten  it  in  that  part. 
Of 
