1230 Megadiascope. 



Estimates. 



9500. Megadiascope, large model, arc lamp with hand regulator, with Standard Optical Out tit 



Size 1 66. 0.0 



9528. 10 Pairs Special Carbons, for 50 amperes ,, 0. 6.0 



9620. Switchboard for connecting Megadiascope with wall ,, 2.10.0 



9626. Series Resistance for 110 volts, 50 amperes 6.10.0 



9649. Water Inlet and Waste 0.13.0 



9651. Projection Screen, rolling-up device with cord; size 3x3 in ,, 3. o.o 



9659. Megadiascope, large model, with preceding accessories 78.1! .o 



9529. Portable Iron Table . 8.15.0 



9510. Megadiascope, small model, arc lamp with hand regulator, with Standard Optical Outfit, 



Size 1 51. 0.0 



9527. 10 Pairs Special Carbons for 30 amperes . 0. 4.0 



9623. Switchboard, for connecting up the Megadiascope with the wall ,, 3. 0.0 



9630. Series Resistance for 110 volts, 30 amperes ,, 3. 0.0 g 



9649. Water Inlet and Waste 0.13.0 



9651. Projection Screen, rolling-up device with cord; size of screen 3x3 m ,, 3. 0.0 w 



9660. Megadiascope, small model, with preceding accessories 60.17.0 



9530. Portable Table 3. 0.0 



P 



Special Outfits. =- 



9661. Projection of the Spectrum: 1 adjustable slit No. 9551, 1 collimator lens No. 9552, = 

 1 absorption box No. 9566, 3 sliders 1 ) No. 9523 3.17.6 F 



9662. Micro-projection with the Projection Microscope No. 9531 : No. 9537 (Objectives Nos. 2 Q 

 and 5), 2 insertion tubes No. 9536 ,, 8. 7.0 3 



9663. Polarisation-Projection with Polarisation Apparatus No. 9567 7. 0.0 Ef 



For those with ample Means. 



9664. Interference and Diffraction, Outfit No. 9598, 2 sliders No. 9523 '), 1 slider No. 9524 18. 8.0 



9665. Projection in natural Tints (Ives's Method), No. 9605 and 3 photographs No. 9606 14. 1.0 



9666. - - do., by diffraction, No. 9607 10. 0.0 



9667. Cinematograph No. 9610 and 3 films (1) 5.10.0 



9668. Production of a narrow Pencil of light : diaphragm No. 9614, lens No. 9615, 2 sliders *) 



No. 9523 2. 1.0 



rt* 



') When a number of the items Nos. 9661, 9664 and 9668 are ordered simultaneously a total of 2 sliders 

 No. 9523 only are delivered with these outfits. 



