BAIRD &TATLOCK (LONDON) LTD. 



1699 



1699" Bunge's Balance, 1 F, similar to Fig. 1698, but with mirror reading arrangement, in 

 polished mahogany case, opening all sides. Load 200 grammes, sensitive to T 1 g milli- 

 gramme. Price, mounted on black plate-glass sole 



In order to be able to read tenths of a milligramme direct from balance, without extending the time of oscilla- 

 tion, a mirror lens (achromatic object lens, silvered), magnifying five times, is arranged at the foot of the pillar 

 so as to reflect, on a magnified scale, without any disturbing reflexes or distortions, an opal glass scale arranged 

 about 20 millimetres above the ivory scale, and divided into fifths of millimetres. The result in milligrammes 

 is read off on the ivory scale, and to determine tenths of a milligramme it is only necessary to glance at the glass 

 scale reflected in the mirror lens. Seeing that it is therefore, only at the final reading that the mirror is made use 

 of, and as both eyes are employed, the sight is not fatigued in any way, and the two scales can be worked with 

 the greatest satisfaction. 



10 10 



1700 



1700 Bunge's Balance, 1 F, with telescope reading arrangement to read minute divisions on 

 micrometer scale, similar in all other respects to Fig. 1699, > n polished mahogany case 

 Load 200 grammes sensitive to T 1 5 milligramme. Price, on black plate-glass sole .. 11 



17 6 



14 CROSS STREET HATTCnST GARDEN, E-C 



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