Eisco PH0602A - Traditional Ray Box
Description
Eisco-Ray-Box-Eisco-PH0602A-P-This-traditional-ray-box-has-three-openings-two-of-which-can-be-used-simultaneously-by-two-sets-of-pupils-Only-a-minimum-of-accessories-are-needed-to-cover-a-wide-range-of-optics-experiments-P-P-The-two-side-openings-each-have-two-slots-for-blanking-plates-or-50mm-slide-accessories-The-front-opening-has-seven-grooves-for-accessories-and-lenses-The-front-opening-has-been-designed-so-that-when-used-with-a-biconvex-cylindrical-lens-of-75mm-focal-length-dive
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