&68  Papers  relative  to  an  Accident 
times,  was  curious  to  confirm  the  faCt,  left  the  preju- 
dices of  vifion,  &c.  might  poflibly  deceive  him. 
The  method  he  took  upon  this  occafion,  was  to  ob- 
ferve  an  appearance  of  light  along  that  hip  of  the  roof 
which  was  next  to  the  corner  ftruck;  and  whether  the 
direction  of  that  appearance  was  different  from  the  di- 
rection of  the  other  appearance  he  had  obferved  at  the 
comer  between  the  two  cramps.  Thefe  appearances  he 
endeavoured  to  aicertain  by  means  of  a paper  tube, 
blacked  on  the  infide,  that  was  laid  upon  a ftand  of  a 
proper  height,  fo  that,  when  he  looked  through  if,  a pin-, 
being  ftuck  upright  at  the  further  end  thereof,  coincided 
with  the  part  in  the  model  he  was  to  examine;  that  is, 
when  the  model  flood  difeCtly  under  the  cylinder.  Being 
thus  circumftanced,  and  when  the  corner  of  the  model 
(during  its  motion)  paffed  the  pin,  he  faw  the  direction 
of  the  light  along  the  hip  next  the  corner,-  and  alfo  be- 
tween the  cramps  at  the  fame  time;. and  was  pofitive  that 
the  direction  of  the  light  appeared  to  be  downward  from 
the  roof,  and,  as  he  thought,  horizontal  between  the  two 
cramps.  Thefe  appearances  were  obferved  by  others 
afterwards,  exaCtly  as-  Mr.  wyatt  had  before  defcribed 
them. 
eighth  observation*  The  fifteenth  experiment 
Slewed,  that  the  corner  of  the  model,-  where  the  two 
cramps 
