Abstract: The method comprises directing light, in the visible light spectrum, of from approximately 4900 to 5800 Angstrom units onto workpieces, or onto containers having translucent bodies in order to illuminate the workpieces, or both the containers and fluent material contents of the containers, the method having a particular utility in inspecting workpieces in assembly or quality control operations, and in inspecting vials, ampoules, and the like, to evaluate and/or detect structural fissures, disconnections, fractures, etc. in such workpieces, and growths (i.e., egg embryos), foreign matter, and the like, in the fluent material contents of the containers, as well as the condition of the containers themselves.

Abstract: The apparatus comprises means usable in the novel method for evaluating materials wettability, as well as measuring the contact angle of a liquid drop, the same comprising a structure for measuring the height of a drop deposited on a material, in that the height of the drop is indicative of both the contact angle of the drop and the wettability of the material upon which the drop is deposited. Thus, the apparatus comprises a platform on which to receive a drop (directly, or via an interposed substrate or like subject "material") -- of predetermined composition and volume -- and means coupled to the platform for gauging the height of the drop, from its chord interfaced with the platform (or substrate or "material"), to its topmost surface.