'ADVJlllTISEMENTS. 
COMPREHENSIVE. 
EFFICIENT. 
Very moderate cost. 
Watson’s Instru¬ 
ments may be 
purchased by pro¬ 
gressive payments 
For full particulars 
see catalogue No. 2, 
post free. 
Spread of Tripod 
7Jin. 
Height, 11 in. 
Stand (as figured) with 
mechanical stage 
and 
compound substage, 
£ 8 . 
Holos Frara 
Stand, with two 
Eyepieces iin. 
and Jin. Objec¬ 
tives, Abbe Illu¬ 
minator, Maho¬ 
gany Case, £12 5 s. 
Set F40. 
Holos F r a in 
Stand with one 
E yepiece, 
tin. and Jin. 
Objectives, 
Mahogany 
Case, 
£10 15 s. 
UI.(Uat$on$ Sons' 
HOLOS FRAM 
MICROSCOPE. 
A highest quality 
microscope with 
all mechanical con¬ 
veniences at a 
very moderate 
cost 
Specially suitable 
for 
Photo-micrography 
W. WATSON & SONS, 313, High Holborn, London, W.C. 
16, Forrest Road, Edinburgh, and 78, Swanston Street, Melbourne, Australia. 
