NEW SPENCER 
CONVERTIBLE BINOCULAR 
MICROSCOPE NO. 58 
CONVERTIBLE: 
For Examining Large Objects on a Table. 
For Examining Vertical Surfaces. 
For Examining High Objects. 
Inclination Joint. 
Stage removable. 
Long range of upward and downward move- 
ment. 
Adjustable arm covering entire stage. 
Mirror adjustable in all directions. 
Accommodation for pupillary distance. 
Automatic shutter cutting off Hght to either eye 
Patented solid objective mount holding lenses 
in absolute alignment. 
ADAPTABILITY -USftBILITY- EFFICIENCY 
AT ITS BEST 
Illustrated circular M I sent on request 
Spencer Convertible Binocular 
Microscope No. 58 
equipped with one pair objectives and 
one pair oculars in cabinet. $72.00 
Discount to schools. 
Clarke Memoir Paper 
A Permanent Record Paper with Half Tone 
and Color Printing Qualities 
CLARKE & COMPANY 
7i t Br answicfc Buildingf 225 Fifth Avenue 
NEW YORK 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
