"2.  The  said  Water  Company  hereby  covenants  and  agrees
that  the  water  so  furnished,  supplied  and  delivered  shall  not  be
drawn  fromi  any  stream  or  lake  the  surface  of  which  is  at  an  ele-
vation of  less  than  four  hundred  and  seventy  feet  above  mean  tide
level,  and  that  such  water  shall  be  of  greater  purity  than  the
water  supplied  to  the  city  of  New  York  from  the  Croton  and
Long  Island  watersheds,  as  shown  by  the  average  of  the  analysis
of  the  water  from  these  sheds  taken  from  the  distributing  reser-
voirs within  the  cities,  which  have  been  under  the  direction  of
the  health  officers  of  the  city  of  New  York  and  of  the  city  of
Brooklyn  during  the  past  year,  as  shown  by  the  public  record  as
compared  with  the  average  of  the  analyses  for  a  like  period  of


Is'os.  26-27.]  2765

the  water  to  be  furnished  by  the  party  of  the  second  part,  taken
at  the  point  of  delivery  to  the  city  to  be  made  by  the  health  of-
ficers of  the  city  of  New  York,  or  by  the  commissioner  of  water
supply  of  said  city.
