ESTABLISHED 1825. 



Telephone 1625 Royal, Liverpool. 

 ,, 643 Manchester. 



Telegraphic Address : 

 Specular, Liverpool- 

 Specular, Manchester 



Thos. Armstrong & Brother, 



Manufacturing Opticians, 

 112, BOLD STREET, LIVERPOOL, 



And at 88 and 90, DEANSQATE, MANCHESTER. 



Contractors to the Admiralty, War Office, India Office, &i, 



OPTICIANS TO THE ROVAL INFIRMARY. 



Scientitic Instrument Makers to H.M. Science and Art Department, South Kensingtit 



STUDENTS' TRIPOD STAND MICROSCOIil 



With rack sub-stage and Iris diaphragm, adapted to le 

 objective as achromatic illuminator, and micrometer scr» 

 fine adjustment, with draw tube; a highly finished al 

 thoroughly improved instrument ; one eye piece in cabin . 



£6 17s. 6d. 



similar to above, 



large vulcanite top st:( 



suitable for large trough. Continental body extend 



to English length by draw tube divided in m/ms, 1 



and pinion focussing sid 



out sub-stage with centi 



adjustment. Fine adji 



ment reading to 1-2000 



inch, a highly - finish 



soundly-made stand w 



^^a,. one eye-piece in Cabinet| 



£10 10s. 



STAND, as above, wl 

 rack adjustment to dr! 

 tube and mechanical u 

 stage, as illustration, 



£13 15s. 



Metallurgical Stand 



Specially constructed 

 Engineers. Specificati| 

 on application. 



REPAIRS A SPEClALI'i 



Prepared Specimens 

 great variety. 



Mounting Material 

 Microscopic Glass in] 

 great variety. 



^^zJ 



Catalogues freej 

 application. 



