Milk  Testing’^  hy  C.  W.  Walker- Tisdale. 
425 
We  can  confidently  recommend  this  book  both  to  the  expert 
and  the  farmer  ; it  fitly  maintains  the  credit  of  the,  oldest  and 
most  renowned  agricultural  experimental  station  in  this  country. 
A.  B.  B. 
Milk  Testing. — C.  W.  Walker- Tisdale. — All  cow-keeping 
farmers  who  depend  upon  milk-selling  for  a considerable  pro- 
portion of  their  income  must  feel  that  the  quality  of  milk  is  at 
this  present  time  much  more  generally  held  to  be  of  importance 
to  the  public  than  it  was  in  the  past ; and  looking  to  the  future, 
it  is  evident  that  the  time  is  coming  when  this  question  of 
quality  will  be  all  important.  To  all  who  appreciate  this  truth 
we  can  thoroughly  recommend  this  little  book.'  Mr.  Walker- 
Tisdale  is  particularly  well  qualified  to  write  such  a treatise,  for 
to  thorough  scientific  knowledge  he  adds  considerable  practical 
experience.  In  this  work  he  has  written  directions  which  any 
“ rule-of-thumb  ” man  can  carry  out  for  himself,  while  on  the 
other  hand  he  has  put  at  the  service  of  the  student  and  the 
expert  a great  deal  of  his  scientific  experience  which,  one 
would  point  out,  is  very  great  for  an  author  whom  one  may 
still  class,  as  regards  age,  as  one  of  the  junior  men  of  the  day. 
If,  as  doubtless  will  be  the  case,  a second  edition  of  this  work 
is  published,  one  or  two  misprints  should  be  corrected.  Such 
as  where  the  “ Test  Bottle,”  page  30,  is  said  to  be  in  the  “position 
for  reading  fat,”  whereas  it  is  upside  down.  “ The  solids  are 
heavier  than  the  liquids”  is  a statement  on  page  17  which  is  apt 
to  be  confusing,  butter  fat  being,  as  we  know,  lighter  than  the 
milk  serum.  In  another  part  of  the  book  (page  12)  we  find  the 
following  ; “ and  these  solids  are  usually  divided  into  the  fat 
portion  and  the ” Yet  at  page  17  under  the  heading 
“ Specific  Gravity,”  the  “ fatty  part  ” is  written  about  as  a 
“ liquid  part.” 
The  fact  that  the  pages  of  this  small  volume  (which  only 
costs  a shilling)  contain  a certain  number  of  rather  scientific 
looking  words,  a few  formulas,  and  some  calculations,  should 
not  be  excuse  enough  for  the  “old-fashioned  practical  man” 
to  refuse  to  read  it,  for  all  the  matter  wanted  by  the  farmer  is 
clearly,  tersely,  and  simply  set  out. 
1 Milli  Testing.  C.  W.  Walker- Tisdale,  F.C.S.,  N.D.D.  W.  R.  Smithson, 
Northallerton.  April,  1909.  1«.  net.  pp.  75, 
