BAIRD &TATLOCK (LONDON) LTD. 



C-p 

 L 



The number of sizes standarised has been reduced to a minimum, as it is desirable to abandon excessive 

 refinements in gradiag tests. It is believed that the I.M.M. Standards will meet all necessary requirements of the 

 laboratory. 



In reporting grading tests it is desirable to state whether wet or dry screening has been employed. 



TABLE. 

 I.M.M. Standard Laboratory Screens. 



NOTE. Whilst absolute accuracy to the fourth place of decimals of an inch is impracticable in the manu- 

 j facture of Wire Cloth, a sufficiently close approximation to the above standards is attainable. 



The adoption of a screening area of 25%, necessitating equality of size of wire and aperture, secures perfect 

 I interlocking and consequent permanence of aperture. 



Some of the finer mesh screens can only be woven in what is known as " twilled." 



6357 



6358 



6357 Skimmer for Crucibles, round, iron, 36 by J in. 



6358 Skimmer for Crucibles, 36 in. long, perforated bowl 



559 Spoon for Sampling Melted Bullion, 4 ft. long, bowl i in. 



A 11 C 



Stencil Plates, alphabet. 

 Size 



6360 Zinc, per set 



6361 Brass, per set 



Stencil Plates, figures. 

 Size 



:362 Zinc, per set 

 363 Brass, per set 



6360-6363 



i 

 2/3 



i 



I/- 



1/3 



036 

 050 

 060 



I* 

 3/6 



4/9 



1/6 

 1/9 



2 in. 



4/6 

 61- 



2 in. 

 1/9 



2/3 



1159 



