BAIRD &TATLOCK (LONDON) LTD. 



4227 



4227" Tintometer No. 17. Pigmentation Meter (Mr. Gray's suggestion). An anthropological 



instrument for registering the colour of the hair, eyes, and skin for racial classification. 

 Instrument alone, 1 1 0. Special hair and eye standards (ten), 3/- each. Set of fifty 

 standard colours for hairs, eyes and skins, 5 0. Complete set of apparatus, and 

 box to contain same 



8 16 6 



4228 



4228 s Tintometer No. 12. Educational Set or Colour Educator. An apparatus for 

 teaching colour in schools, consisting of a frame with six apertures for the standard 

 glasses, twenty-seven standard colours, white plate for dealing with opaque colours, 

 coloured diagrams for illustration, and handbook of instruction . . . . . . 1 



1 



4229 s Tintometer No. 13. Colour Blind Set, consisting of an upright frame pierced with 

 eight apertures for testing the vision for transparent colours, and a white table top for 

 opaque colours. The standard consisting of thirty-two simple and compound colours, 

 are arranged in two trays ; also card of instructions and chart for classifying the results 

 of the examination . . . . . . . . . . . . . . ..550 



1230 s Tintometer No. 14. Colour Top, for demonstrating and measuring the effect of definite 



mixtures of coloured light . . . . . . . . . . . . . . 2 10 



Discs for use with the above . . . . . . . . . . . . each 050 



1231 s Tintometer No. 15. Smoke Density Tester, consisting of an optical instrument with 

 two apertures, one for viewing the smoke, the other being intercepted by the standardised 

 smoke glasses .. .. .. .. .. .. ..220 



T 232 S Tintometer No. 16. Fog Density Tester. An instrument for measuring fog densities 

 and luminosities of lower intensities than daylight. The apparatus consists of an 

 optical instrument on stand, a lamp for the standard light, a reflector and ninety 

 standard glasses in box . . . . . . . . . . . . . . 13 5 



CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



795 



