ess? 



BAIRD StTXTLOCK (LONDON) LTD. 



3216 



216 T Calculating Slide Rule, Prof. Fuller's, having a logarithmic scale of numbers 41 ft. 8 in. in 

 length, which is equivalent to a straight rule 83 ft. 4 in. long in mahogany case 



217 T Calculating Slide Rule, as above, with scale of sines on the fixed cylinder 



10 



1 



Mil 



METRE2 



BIRD S TUTLOCK. 

 (LONDON) LTD. 



v 



6 



M 



8 



m 



0? 



3218-3219 



218 Boxwood Scales divided into inches and tenths of an inch along one edge, and into centi- 



metres and millimetres along the other edge . . i metre long, each, 1/7 ; per doz. 



219 Boxwood Scales, as above .. .. ,, ., ,, 1/1 ; ,, 



300 

 3 15 



18 

 12 



3220-3221 



220 Boxwood Scales, divided into centimetres and millimetres on one edge 



metre long, each, lid. ; per doz. 



221 Boxwood Scales, as above 



1/3 ; 



10 

 14 



3222 



222 Boxwood Scales, 12 in. long, marked one edge inches in tenths, and the other edge in 



centimetres and millimetres, both edges bevelled . . . . each, 4d. ; per doz. 036 



223 Boxwood Scales, 9 in. long 



3d. ; 



026 



(CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



611 



2 R 



