BAIRD &TATLOCK CONDON) LTD. 



5787 



5787 1 Ultra-violet Glass Spectrograph, Hilger's, with two prisms and lenses of the most 

 transparent ultra-violet glass, the lenses of 8 in. (203 millimetres) focus, the spectrum 

 from W.L. 8,000 to W.L. 3,000, occupying about 40 millimetres long. Size of plate, 

 4l by 3i in - The slit is our No. i. This instrument is very suitable for photographs 

 of blood absorption bands, etc. . . 



5788 T Ultra-violet Glass Spectrograph, as above, same optical design, but lenses of 24 in. 

 (610 millimetres) focus, giving a spectrum from W.L. 8,000 to W.L. 3,000 of about 120 

 millimetres long. Size of plate, 6J by 4f in. The slit of this instrument is our No. 2 . . 



18 10 



46 10 



5789 1 Quartz Spectrograph, Hilger's, dispersing system one Cornu prism, same design and 

 size as the ultra-violet glass Spectrograph above, giving a spectrum from W.L. 8,000 

 to W.L. 2,000 of about 65 millimetres long. Size of plate, 4j by 3^ in. . . . . 24 







L 



5790 



5791 



5790 T Spectroscope, by Schmidt & Haensch, Kirchhoff-Bunsen pattern, fitted with movable 

 telescope, protecting prism box and millimetre scale, with slit, flint glass prism and 

 oculars Nos. 8a and loa 



8 15 



5791 T Spectroscope, by Schmidt & Haensch, Kirchhoff-Bunsen pattern, with fixed protecting 

 box, telescope with adjusting movement and millimetre scale, fitted with slit, flint glass 

 prism, oculars Nos. 8a and xoa, scale illuminating mirror, etc. . . . . . . 12 



CROSS STREET HATTCW GARDEN, E-C 



1050 



