Sounds  not  produced  without  some  local  motion  of  the  medium,. 297^  yet  distinction  to  be  made  betwixt  the  motion  of  the  air
and  the  sounds  themselves,  ib. great  sounds  without  great  mo-
tions in  the  air,  from  other  bodies,  ib. have  rarified  the  air  much,
ib. have  caused  deafness,  ib. indosure  of  sounds  preserveth  them,
298. Sounds  partly  inclosed,  and  partly  in  open  air,  ib. better
heard  from  without  than  within,  ib. a  semiconcave  will  con-
vey sound  better  than  open  air,  ib. any  long  pole  will  do  the  like,
298,  trial  to  be  made  in  a  crooked  concave,  ib. Sounds  may  be
created  without  air,  299,  difference  of  sounds  in  different  vessels
filled  with  water,  ib. Sound  within  a  fiame,  ib. Sound  upon
a  barrel  emptier  or  fuller,  ib. Sound  not  created  betwixt  the
bow  and  the  string,  but  betwixt  the  string  and  the  air,  299,
the  majoration  of  sounds,  303,  soft  bodies  damp  sounds,  304,
mixture  of  sounds,  ib. magnitude  of  sounds,  300,  305,  in  a
, trunk,  298,  in  a  hunter's  horn  bigger  at  the  lo^ei  eiisi,  '^^,


in  a  TOiiIt  unikr  the  cartlt,  i. 300,  ip  hawk's  lells,  rgtW  Ann
upon  a  [liccc  of  brass  in  the  opcu  air,  ib. in  a  drum,  301,  far-
ther heard  by  ni^ht  than  by  day,  why,  ib. increased  by  the
concurrent  reflectioa,  ib. increoacd  by  the  scnnd-board  in  in-
struments, ib. in  on  Irish  harp,  ib. in  a  virginal  the  lid  shnt,
31)2,  in  a  ccncnve  within  a  wall,  ib. in  a  bow-string,  the  hon»
nf  the  bow  laid  to  the  ear,  ib. the  like  in  a  rod  of  iron  or  brass,
ib. the  like  conveyed  by  a  pillar  of  wood  from  ^n  npper  cham-
ber to  fi  lower,  ib. the  like  from  the  bottom  of  a  well,  ib. five
ways  of  majoration  of  sounds,  303,  exility  of  sounds  through
any  porous  bodies,  ib. throngh  water,  ib. strings  stopped  short,
304,  damping  of  sounds  with  a  soft  body,  ib. iron  hut  not  so
sounding  as  cold,  305,  water  warm  not  so  sounding  in  the  &11,
as  cold,  ib. loudneas  and  aiiftness  of  sonnd  differ  from  tnagm-
tude  and  exility,  ib. loudness  of  sounds,  whence,  30ti,  com-
munication of  Bounds,  ib. inequality  of  sounds,  307. unequal
Konnds  ingriite,  ib. grateful  sounds,  ib. 