Btruction  in  Mineralogy  applied  to  Geology  and  the  Arts  is  given  by 
fessor  Tbnnaht,  F.G-.S.,  at  his  residence,  149  Strand.  London,  W.C. 
Course  commences  with  a  description  of  the  Physical  and  Chemical  characters  of 
in  general,  and  includes  a  minute  description  of  all  the  substances  entering  into 
sition  of  Kocks.  and  of  those  Minerals  which  are  also  used  in  the  Arts ;  illus- 
an  extensive  collection  of  characteristic  specimens,  and  diagrams  of  the  principal 
ine  forms.  &c. 
Students  are  accompanied  occasionally  to  the  Museum  of  Practical  Geology,  the 
Museum,  and  other  public  institutions,  and  also  on  excursions  into  the  country. 
SOPWITH'S  GEOLOGICAL  MODELS  IN  WOOD. 
ft)  illustrate  the  nature  of  Stratification ;  of  Valleys  of  Denudation ;  Succession  of  Coal- 
8ns  in  the  Newcastle  Coal-field;  Strata  of  adjacent  Lead-mine  districts ;  the  effects  pro  - 
ced  by  Faults  or  Dislocations ;  Intersections  of  Mineral  Veins,  &c.;  accompanied  with  a 
fcerpress  description,  which  can  be  had  separately,  price  Is.  6d.,  by  T.  Sopwith,  C.E.  &c. 
Bold  in  Case,  bound  and  lettered  to  resemble  a  large  folio  volume. 
Twelve  Models,  4  inches  square £5    0 
A  Catalogue  of  2000  of  the  most  common  Fossils  found  in  the  British  Isles,  being  a  list 
se  in  the  private  collection  of  J.  Tbnnaht,  F.G.S.     Price  2s. 
the  recent  Works  relating  to  Mineralogy,  Geology,  Conchology,  and  Chemistry ;  also 
eal  Maps,  Models,  Diagrams.  Hammers,  Blowpipes,  Magnifying- Glasses,  Platina 
Oons,  Electrometer  and  Magnetic  Needle,  Glass-top  Boxes,  Microscopic  Objects,  Forceps, 
id  Bottles,  &c,  can  be  supplied  to  the  Student  in  these  branches  of  Science. 
FOR  SALE.— TWO  CABINETS,  each  measuring  9  feet  3  inches  long,  2  feet  4  inches 
Ae,  and  3  feet  10  inches  high ;  each  containing  45  drawers,  with  a  Glass  Case  on  the 
■of  each  Cabinet,  4  feet  11  inches  high,  and  15  inches  from  back  to  front.  One  Cabinet 
filled  with  2(500  Minerals,  the  other  with  3400  Fossils. 
The  Collection  consists  of  six  thousand  specimens,  many  very  cJwice,  and  selected  prin- 
»lly  from  the  Duke  of  Buckingham's  (Stowe  sale),  Marchioness  of  Hastings,  Sir  John 
.  Aubyn's,  Drs.  Buckland,  Bowerbank,  Mantell,  and  other  celebrated  collections.  The 
old  Nugget  received  from  Australia,  which  was  exhibited  in  the  Exhibition  of 
51,  is  in  the  Collection;  it  cost  i.'37:  and  contains  about  8  ounces  of  gold:  also  a 
■cries  of  Diamonds,  illustrating  crystalline  form  and  colour,  from  India,  Brazil,  South 
rica,  and  Australia.     Price 
THREE  THOUSAND  GUINEAS. 
Any  person  wishing  to  become  practically  acquainted  with  the  interesting  and  important 
idy  of  MINEBALOGY  and  GEOLOGY  will  find  this  a  good  opportunity  to  obtain  an 
jfcructive  and  valuable  Museum  scientifically  arranged,  the  specimens  having  been  col- 
ted  with  care  and  at  great  expense  during  the  last  thirty  years. 
Elementary  Geological  Collections  at  2,  5, 10,  20,  50,  to  100  guineas  each,  and 
ery  requisite  to  assist  those  commencing  the  study  of  this  interesting  branch  of  Science, 
mowledge  of  which  affords  so  much  pleasure  to  the  traveller  in  all  parts  of  the  world. 
A  collection  for  Five  Guineas,  to  illustrate  the  recent  works  on  Geology,  by  Ansted, 
ickland,  Lyell.  Mantell,  Murchison,  Page,  Phillips,  and  others,  contains  200  specimens, 
a  plain  Mahogany  Cabinet,  with  five  trays,  comprising  the  following  specimens,  viz. : — 
Mineral-;  which  are  either  the  components  of  Kocks,  or  occasionally  imbedded  in 
em — Quartz,  Agate,  Chalcedony,  Jasper,  Garnet,  Zeolite,  Hornblende,  Augite,  Asbestos, 
skpar,  Mica,  Talc,  Tourmaline,  Spinel,  Zircon,  Corundum,  Lapis  Lazuli,  Calcite,  Fluor, 
Inite,  Baryta,  Strontia,  Salt,  Sulphur,  Plumbago,  Bitumen,  &c. 
Native  Metals,  or  Metalliferous  Minerals  ;  these  are  found  in  masses  or  beds,  in 
ins,  and  occasionally  in  the  beds  of  rivers.  Specimens  of  the  following  Metallic  Ores  are 
&  in  the  Cabinet : — Iron,  Manganese,  Lead,  Tin,  Zinc,  Copper,  Antimony,  Silver,  Gold, 
atina,  Mercury.  Titanium,  &c. 
Rocks  :  Granite,  Gneiss,  Mica-slate,  Clay-slate,  Porphyry,  Serpentine,  Sandstones,  Lime- 
*ies,  Basalt,  Lavas,  &c. 
Paleozoic  Fossils  from  the  Cambrian,  Silurian,  Devonian,  Carboniferous,  and  Permian 
'Secondary  Fossils  from  the  Rhaetic,  Lias,  Oolite,  Wealden,  and  Cretaceous  Groups. 
Iertiauy  Fossils  from  the  Plastic  Clay,  London  Clay,  Crag,  &c. 
En  the  more  expensive  collections  some  of  the  specimens  are  rare,  and  all  more  select. 
JAMES  TENNANT,  Mineralogist  (by  appointment)  to  Her  Majesty, 
149  Strand,  London,  W.C.  April  1872. 
