>i  2 8 Dr.  MACBRiDii’s  improved 
ooze,  ill  a fourth  part  of  the  time  which  is  required,  if 
only  common  ooze  be  made  ufe  of;  yet  the  bufinefs  of  a 
large  tan-yard  cannot  be  carried  on  with  fo  much  expe- 
dition : but  even  in  large  works,  and  in  the  common 
courfe  of  bufinefs,  foal  leather  can  be  completely  tanned 
and  finifhed,  in,  from  eleven  to  fifteen  months,  accord- 
ing to  the  different  weight  and  thicknefs  of  the  hides. 
Butts  in,  from  eight  to  twelve  months,  and  calf-ikins  in, 
from  fix  to  twelve  weeks;  in  general,  the  tanner  may 
fave  at  leaft  a third  of  the  time  that  has  hitherto  been 
required. 
xxm.  The  leather,  which  is  manufactured  in  the  new 
way,  is  of  a fuperior  quality  to  that  of  the  old  tannage, 
efpecially  the  foal-leather,  which  wears  remarkably  well, 
and  never  fliews  the  leaft  fign  of  rottennefs. 
xxiv.  Let  it  always  be  remembered,  that  the  lime- 
water  is  never  to  be  ufed  but  when  it  is  fufficiently 
ftrong,  and  as  clear  as  rock-water. 
xxv.  Whenever  you  make  frefli  ooze,  you  muft  always 
ufe  frefli  lime-water,  and  run  the  ooze  through  two 
letches ; and  the  lime-water  ooze,  when  fpent,  from  lying 
on  the  leather,  is  never  to  be  returned  back  upon  the 
bark  which  is  in  the  letches  (as  you  now  return  your 
fpent  ooze)  but  muft  always  be  thrown  away,  as  being 
entirely 
