BAIRD &TATLOCK (LONDON) LTD. 



1746 



1747 



1746 



Balance, Oertling's Assay, No. 12 B (new pattern), with 4-in. (10 centimetre) beam, 

 divided into 100 parts. The beam is constructed with agate knife-edges working on 

 agate planes, and the end knife-edges are relieved when not in action. Sensitivity .005 

 milligramme. The pointer makes one complete oscillation in 10 seconds, and with o.i 

 milligramme on beam shows 10 divisions on scale. Lenses for beam and index. Capacity 

 i gramme in each pan. Single rider apparatus. Full sub-base plate-glass covering entire 

 bottom of case, including table-part. Polished mahogany glass case with counterpoise 

 weights fitted to front slide 



1747" Balance Oertling's Assay, No. 11 C (new pattern). Capacity i gramme, sensitivity 

 ij^j milligramme, with 4-in. (10 centimetre) beam, .inverted type; divided into 100 

 parts ; 50 divisions each side. The beam is constructed with agate knife-edges working 

 en agate planes, and all knife-edges are relieved when not in action. The pointer 

 makes one complete oscillation in 10 seconds, and with o.i milligramme shows 10 divisions 

 on scale. Lenses for beam and index. Double rider apparatus. Two levels fitted to 

 base. Full sub-base plate-glass covering entire bottom of case including table-part. 

 Polished mahogany glass case with counterpoise weights fitted to front slide, and with 

 adjusting screws 



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40 



CROSS STREET HATTOTST GARDEN, E-C 



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