xlii 
Utiles  of  Competition  for  Prize  Essays. 
6.  The  copyright  of  all  Essays  gaining  prizes  shall  belong  to  the  Society, 
who  shall  accordingly  have  the  power  to  publish  the  whole  or  any  part  of  such 
Essays ; and  the  other  Essays  will  be  returned  on  the  application  of  the 
writers ; but  the  Society  do  not  make  themselves  responsible  for  their  loss. 
7.  The  Society  are  not  bound  to  award  a prize  unless  they  consider  one  of 
the  Essays  deserving  of  it. 
. 8.  In  all  reports  of  experiments  the  expenses  shall  be  accurately  detailed. 
9.  The  imperial  weights  and  measures  only  are  those  by  which  calculations 
are  to  be  made. 
10.  No  prize  shall  be  given  lor  any  Essay  which  has  been  already  in  print. 
11.  Prizes  may  be  taken  in  money  or  plate,  at  the  option  of  the  successful 
candidate. 
12.  All  Essays  must  be  addressed  to  the  Secretary,  at  the  house  of  the 
Society. 
General  Jtteettngs  m 1850-51. 
The  General  December  Meeting,  in  London,  on  Saturday, 
the  14th  of  December. 
The  General  May  Meeting,  in  London,  on  Thursday, 
May  22,  1851. 
The  Annual  Country  Meeting,  at  Hampton  Court,  in  1851. 
Annual  ^ruhscripti'ons. 
Subscriptions  may  be  paid  to  the  Secretary,  in  the  most  direct 
and  satisfactory  manner,  either  at  the  Office  of  the  Society,  No. 
12,  Hanover-Square,  London,  between  the  hours  of  ten  and  four, 
or  by  means  of  Post-Office  orders,  to  be  obtained  on  application 
at  any  of  the  principal  Post-Offices  throughout  the  kingdom,  and 
made  payable  to  him  at  the  General  Post-Office,  London  ; but 
any  cheque  on  a Bank,  or  other  house  of  business  in  London, 
will  be  equally  available,  if  made  payable  on  demand.  The 
subscriptions  are  due  in  advance  for  each  year  on  the  1st  of 
January,  and  are  in  arrear  if  unpaid  by  the  1st  of  June  ensuing. 
No  Member  is  entitled  to  the  Journal,  or  to  any  other  privilege 
of  the  Society,  whose  subscription  is  in  arrear. 
