Blood typing installations

摘要

A blood typing installation comprises a transparent cradle for a glass agglutination plate and a flash behind the cradle to project an image of the plate via an optical system onto a screen at the bottom of a laterally open box carried by sliding tubes mounted on the installation casing. Further sliding tubes carry a camera for photographing both the image on the screen and the individual whose blood is being typed and who is placed behind the box, to provide a record card.