BAIRD &TATLOCK (LONDON) LTD. 



1399' James Swift & Son's New Apochromatic Objectives. 



OIL IMMERSION. 



1400' James Swift & Son's Improved Achromatic Objectives. 



OIL IMMERSION SYSTEMS. 



DD Adjustable Cell to any system above \ in. 



extra 100 



ICHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS- 



283 



