88 
Dr.  darwin  on  a 
by  the  form  of  a cap  or  head-drefs,  which  might  have 
been  too  prominent  on  the  fides  of  his  face,  like  bluffs 
ufedon  coach-horfes ; and  might  thence,  in  early  infancy, 
have  made  it  more  convenient  for  the  child  to  view  ob- 
jects placed  obliquely  with  the  oppofite  eye,  till  by  habit 
the  mufculi  adduSiores  were  become  ftronger,  and  more 
ready  for  motion  than  their  antagonifts. 
A paper  gnomon  was  made,  and  fixed  to  a cap ; ahd 
when  this  artificial  nofe  was  placed  over  his  real  nofe,  fo 
as  to  project  an  inch  between  his  eyes,  the  child,  rather 
than  turn  his  head  fo  far  to  look  at  oblique  objects,  im- 
mediately began  to  view  them  with  that  eye  which  was 
next  to  them.  But  the  death  of  Dr.  sandfqrd,  which 
happened  foon  after,  occafioned  the  removal  of  his  fa- 
mily; and  the  grief  and  cares  of  Mrs.  sandford  pre- 
vented this,  and  the  other  methods  propofed,  from  being 
put  in  execution. 
About  a month  ago  I had  again  an  opportunity  of 
feeing  mafter  d.  sandford,  and  obferved  all  the  circum- 
ftances  of  his  mode  of  vifion  to  be  exactly  as  they  were 
fix  years  before,  except  that  they  feemed  eftablifhed  by 
longer  habit ; fo  that  I could  not  by  any  means  induce 
him  to  bend  the  axes  of  both  his  eyes  on  the  fame  object, 
not  even  for  a moment. 
A gnomon 
