BAIRD &.TATLOCK. (LONDON) LTD. 



4810 



4810 T Photometer Bench, as per illustration, being a smaller pattern steel tube bar made on 

 the model of No. 4808 but with steel tubes, 9 ft. by i in., japanned, engraved with two 

 scales, provided with winding attachment for actuating carriers.* three of which are 

 provided, all having vertical adjustment . . . . . . . . . . . . 20 10 



481 1 T Photometer Bench as per 4810, but with one scale only engraved, i.e. either metric or 



candle scale, without winding attachment . . . . . . . . . . 16 



4812 1 Wooden Screens for above photometers, either solid or with central aperture . . per pair 200 



4813 1 Engraved Horizontal Quadrant for fitting on carrier of Nos. 4808 to 4811, with plug and 



pointer for taking electric lamps or gas burner . . . . . . . . . . 0176 



B. TECHNICAL BENCHES WITH WOODEN BARS. 



4814 T Photometer Bar of English Standard section. Made in seasoned pine on mahogany cross 

 foundation, the scale being engraved on inlaid boxwood slip. Each bar made to section 

 shown (full size), French polished and mounted on brass pillars as shown. For direct 

 reading in candle power, lights 60 in. apart . . . . . . . . . . 220 



4815 T Photometer Bar as No. 4814 but for lights 1.5 metres apart 

 4816 1 Photometer Bar as No. 4814 but for lights 100 in. apart 

 4817 T Photometer Bar as No. 4814 but for lights 2 metres apart 

 4818 T Photometer Bar as No. 4814 but for lights 150 in. apart 

 4819 1 Photometer Bar as No. 4814 but for lights 3 metres apart 



.CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



