BAIRD &TXTLOCK. (LONDON) LTD. 



1744 



1745 



1744' 



1745' 



Balance, Oertling's Assay, No. 14 (as used by the Royal Mint), with 6-in. horizontal 

 beam, to carry I gramme in each pan, and turn with 0.005 milligramme ; the beam is 

 constructed with agate knife edges working on agate planes, and is divided into 100 

 parts ; fitted with double rider-slide and also two achromatic lenses ; plate-glass to 

 bottom of case ; polished mahogany glass case with counterpoise weights fitted to front 

 slide 



This Instrument is richly gilt. 



Oertling's Balance, No. 12 S.B.A. (as used by the Royal Mint), with 6-in. horizontal 

 beam, to carry 2 grammes in each pan and turn with o.oi milligramme. The beam is 

 constructed with agate knife edges working on agate planes (which are all relieved when 

 not in use), and divided into 100 parts. Double rider-slide, plate-glass to bottom of 

 case ; polished mahogany glass case with counterpoise weights fitted to front slide 



40 



31 10 



jCHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS- 



357 



