12 
BRITISH CAPITAL. BRITISH CONTROLLED. 
Trade Mark “TECHNICO” 
A. GALLENKAMP & CO, Ltd. 
Telephone: LONDON WALL 1404 and 1405. 
Telegrams: GALLENKAMP FINSQUARE, LONDON. 
BACTERIOLOGY 
SUNDRIES FOR MICROSCOPICAL RESEARCH 
Write for Circular No. 233 
19 & 21 SUN STREET, 
FINSBURY SQUARE, LONDON, E.C.2 
FINE SECOND-HAND 
MICROSCOPES 
By all the leading makers, Zeiss, Leitz, Watsons, etc. 
FOR SALE and WAITED FOR GASH 
AS WE WORK ON A VERY SMALL MARGIN OF PROFIT 
We can usually offer special fine instruments at very low prices. 
All accessories. [We have at present a small parcel of 
magnificent 1/12'' oil immersion objectives at £3-17-6 each.] 
AH New Models supplied at 
lowest list prices 
Deferred Payments Exchange. Best Value. • 
WALLACE HEATON, L TD 
119 S^ew Bond Street, London, W„1 
Also at Change Alley, Sheffield 
