474 
Report  on  the  Exhibition  of  Implements 
upright  shaft  of  the  testing  machine  caused  the  horse-wheel  cogs 
to  work  deeper  into  the  pinion  than  they  should  have  done  ; and 
Mr.  Garrett  earnestly  requested  leave  to  put  on  a new  pinion, 
that  the  machine  might  be  again  tried,  but  as  the  Judges  con- 
sidered it  a rule  that  whenever  a breakage  occurs  the  machine 
under  trial  is  to  be  immediately  withdrawn,  and  as  they  had 
acted  on  this  rule  in  other  cases,  they  could  not  do  otherwise  in 
this  instance,  without  the  sanction  of  the  Stewards. 
A meeting  of  the  Stewards  and  Judges  was  convened,  and  it 
was  decided  that  the  rule  of  the  Judges  must  be  adhered  to; 
but  as  it  u’as  clearly  shown  that  70  sheaves  of  barley,  instead  of 
50  sheaves,  were  counted  out  in  the  first  experiment,  and  that 
from  that  fact,  and  from  the  data  obtained  in  the  last  experiment, 
a fair  result  could  beobtained.it  was  decided  that  the  Consulting 
Engineer  (with  the  assistance  of  one  of  the  mechanical  Judges) 
should  obtain  that  result. 
The  first  experiment,  reduced  to  50  sheaves,  took  5 minutes 
52  seconds  to  thresh  them,  and  the  power  of  3 ■ 15  horses  to  work 
the  machine;  the  time  multiplied  by  the  power  equals  18*52 
horses  to  thresh  50  bundles  of  barley  in  one  minute  ; the  average 
power  is  indicated  on  the  diagram  given  off'  by  the  testing  machine, 
bein-r  18  14  lbs. 
The  last  experiment,  similarly  reduced,  shows  that  50  sheaves 
would  have  been  threshed  in  5 minutes  12  seconds  ; that  it  took 
4- 7 horse-power  to  work  the  machine,  24*44  horse-power  to 
thresh  50  sheaves  in  one  minute  ; and  the  diagram  indicated  22*39 
lbs.  on  the  average  during  the  time  the  machine  was  working. 
From  the  foregoing  facts  it  appears  reasonable  to  suppose 
that  over-feeding  had  no  little  share  in  breaking  the  machine, 
for  the  last  experiment  shows  that  the  work  w7ould  have  been 
done  in  40  seconds  less  time  than  it  would  have  been  done  in  the 
first  experiment  with  barley,  and  it  also  shows  that  it  took  more 
power  to  do  it.  It  may  be  alleged  that  this  excess  of  power  was 
owing  to  the  cogs  being  too  deep  in  gear;  but  if  we  compare  the 
average  power,  28 ‘39  lbs.  as  indicated  by  the  diagram  while 
threshing  wheat,  with  the  last  diagram,  22 *39  lbs.  while  threshing 
barley,  it  will  be  seen  that  the  strain  upon  the  gearing  was  greater 
in  the  former  than  in  the  latter  instance,  and  the  difference  in 
the  horses'  power  arises  from  the  machine  working  something  faster 
in  the  last  case.  It  must  also  be  borne  in  mind  that  the  friction 
of  the  machine  was  tried  alter  the  first  experiment,  and  after  the 
average  diagram  of  power  had  been  greater  than  it  ever  w'as  after- 
wards during  the  last  experiment,  which  indicates  the  irregular 
strain  upon  the  machine.  The  following  diagram  shows  the 
working  of  the  machine,  and  the  point  at  which  it  gave  way. 
Corn- dressing  Machines. — In  the  trial  of  corn-dressing  machines, 
