R«^TABI.ISHF.D 1825. 



Telephone 1625 Koyal, Liverpool. 

 ,, 643 City, Man hester. 



Telegraphic Address: 



Specular, Liverpool. 

 Spe ular, Manchester. 



Thos, Armstrong & Brother, 



flDanufacturino ©pticiane, 

 112, BOLD STREET, LIVERPOOL, 



And at -78, DEA.NSOATB, WI ANCHESTBR. 



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



OPTICIANS TO THE ROYAL INFIRMARY. 

 Scientific instrument Makers to H.M. Science and Art Department, S outh Kensington. 



STUDENTS' TRIPOD STAND MICROSCOP 



With rack siib-stagc and Iris diaphragm, adapted to u; 

 ..hicctive as achromatic illuminator, and micromet<, 

 scivw fine adiustmont, with draw tube ; a highly-fimshej 

 :uid thormijlilv-iiiiproved instrument: one eyc-pied 



hinct. 



£6 17s. 6d. 



LABORAIORl MANU, Urge'lulcanfteTopstL' 

 ible for largo trough, Continental body extend' 

 niilish length by draw tube divided in m/ras, r;i 

 and pinion focussi 

 siding out sub-stage w 

 pentring adjustmo! 



Fine adjustment roadi 

 to l-'20U0ths inch. 

 highly-finished sninn! 

 made stand ^^ ii li ' 

 (\vo-piocc in C'ahii 



£10 10s. 



STAND, ao aboxc, 

 rack adjustment to dr 

 tube and mechanical 

 stage, as illustrati 



£13 15s. 



Metallurgical Standi 



Specially construe 

 for Engineers. Sp© 

 cation on applicati 



REPAIRS A SPECIAU 



Prepared iSpecimenB 



groat variety. 

 Mounting material 

 Microscojiic glass 1 

 ■vient variety. 



CATALOGUES FREE 

 APPLICATION. 



J, 



