8 
Wratten Specialties 
for Microscopy 
Wratten “M” Filters and Wratten “M” Plates give the 
maximum amount of detail and the maximum amount 
of contrast when photographing stained specimens. 
Wratten Visual 6S M” Filters as their name 
implies, are for visual work with the microscope. 
35m.m. in diameter for Standard Substage Ring. 
Special Filters for Special Work. 
“ Notes on the use of Wratten 
* M ’ Filters ” 3d. post free. 
Kodak Ltd., Wratten Div., Kingsway, London, W.C. 2. 
THE 
BINOCULAR EYEPIECE 
STAND A. & B. 
SKIN MICROSCOPE 
frflOl J • 
NEW 
I 
IMPROVED PARABOLOID 
CONDENSER FOR SLIDES 
OF VARIED THICKNESSES 
Distributors : 
W. AT HA & CO. 
8 Southampton Row, W.C.l 
MICROSCOPIC STAINS AND SOLUTIONS 
MOUNTING MEDIA 
PURE DYES for all Scientific Purposes 
Price List on application STANDARD QUALITY Telephone : PUTNEY 1463 
GEORGE T. GURR 
35 Perrymead Street, Fulham, London, S.W.6 
