32  SCIENTIFIC  BOOKS  PUBLISIIED  BY

The  Useful  Metals  and  their  Alloys;
ScofFren,  Tniran,  and  others.
Fifth  Edition.
8ro.  Half  calf.  $3.75.
THE  USEFUL  METALS  AND  THEIE  ALLOYS,  incliding
MINING  VENTILATION,  MINING  JUEISPEUDENCE
AND  METALLUKGIC  CHEMISTEY  employed  in  the  conversion
  of  IEON,  COPPEE,  TIN,  ZING,  ANTIMONY,  AND
LEAD  OEES,  with  their  applications  to  THE  INDUSTBIAL
AETS.  By  John  Scoffren,  William  Trttran,  William  Clay,
Eodert  Oxland,  William  Fairbairn,  W.  C.  Aitkin,  and  William ­
  VoSE  PlCKETT.

Gollins’  Usefnl  Alloys.
18mo.  Flexible.  75  cents.
THE  PEIYATE  BOOK  OE  USEFUL  ALLOYS  and  Memoranda ­
  for  Goldsmiths,  Jewellers,  etc.  By  James  E.  Collins
This  little  book  is  compiled  from  notes  made  by  tbe  Author  from  the
papers  of  one  of  the  largest  and  most  eminent  Manufacturing  Goldsmiths  and
Jewellers  in  this  country,  and  as  the  firm  is  now  no  longer  in  existence,  and  the
Author  is  at  present  engaged  in  some  other  undertaking,  he  now  offers  to  the
public  the  benefit  of  his  experience,  and  in  so  doing  he  begs  to  state  that  all
the  alloys,  etc.,  given  in  these  pages  may  be  confidently  relied  on  as  being
thoroughly  practicable.
The  Memoranda  and  Receipts  throughout  this  book  are  also  compiled
from  practice,  and  will  no  doubt  be  found  useful  to  the  practical  jeweller.
—Shirley,  July,  1871.
«
Joynson's  Metals  Used  in  Construction.
12mo.  Cloth.  75  cents.
THE  METALS  USED  IN  CONSTEUCTION:  Iron,  Steel,
Bessemer  Metal,  etc.,  etc.  By  Francis  Herbert  Joynson.  IIlustrated.

“  In  the  interests  of  practical  Science,  we  are  bound  to  notice  thia  work  ;
and  to  those  who  wish  further  information,  we  should  say,  buy  it;  and  the
outlay,  we  honestly  believe,  will  be  considered  well  spent.”  —  Scientific
Review.