Laboratory apparatus, instruments and supplies, laboratory instruments for use in staining tissue specimens mounted on glass slides, automated histology and/or cytology slide staining apparatus, tissue processors for histology, tissue cassettes for histology, automatic slide coverslippers, slide preparation equipment, microscopic slides and cover glass; medical laboratory and pathology equipment and supplies, automated histology and/or cytology slide staining apparatus, automatic slide coverslippers, slide preparation equipment, microscopic slides and cover glass.