BARR & STROUD

CHEMICALS AND CHEMICAL PREPARATIONS FOR USE IN THE OPTICAL AND ACOUSTIC INDUSTRY - NAMELY, OPTICAL CEMENT, RESINS, FLEXIBILISERS AND CATALYSTS; INFRA RED PREPARATIONS AND COATINGS - NAMELY, GERMANIUM, SILICON, CALCIUM ALUMINATE, ARSENIC TRI-SULPHIDE; ELECTRO-OPTIC AND ELECTRO-ACOUSTIC MATERIALS - NAMELY, LITHIUM NIOBATE CRYSTALS