PREVENTING THE FUNGUS FOULING OF OPTICAL INSTRUMENTS RICHARD E. VICKLLND The E n g i n e e r Hocrrd.
Figure 1 . Eil'ect of Radium o n Funguz L r o w th. 4boce. Agar 11ediurn o\er R h i c h Radium Foil W a s Suspended. B e l o u , No Radium Foil Present (Control).
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' h i . paper discusse. the deterioration of optical glass i n tropical area* and the development of a method for pre\entinp the deterioration of optical instruments caused hj the growth of fungi on lenses and prism.. Such deterioration. coninionl> referred to a i fungus fouling, is a seriou. problem iii tropical area.. Radium sulfate was incorporated into a metallit foil, which w a s '-ubjected to mjcological and phjsical tests to deterniinc. the fungicidal efficacj and practicabilitj of such a treatment. 'The recultindicate: ( a ) Kndium-ncti\.ited foil will pre\ent fungus fouling of optic.
