The Geologigal Magazine Advertiser. 
PROFESSOR TENNANT, F.G.S., ETC., 
flaving been engaged as a practical Mineralogist 
and Geologist during upwards of half a century, 
7s about to retire from the active business of his 
profession. With this view he takes the liberty 
of inviting attention to his extensive Collections 
of Minerals and Fossils, which he ts now tn a 
postition to offer at greatly reduced prices. The 
Specimens are arranged in Sets, adapted to the 
young Amateur as well as to the more advanced 
Student, and tt is thought that many persons 
might feel disposed to take advantage of the 
present opportunity, which ts not likely to occur 
again, especially with vespect to the large and 
unique Collections, which are equally well adapted 
to the Gallery of the Nobleman or Gentleman, the 
Museums of our Public Schools, or the Colleges of 
our Colonies. 
149, STRAND, W.C., MAY, 1880. 
