Abstract: A cover-slip suitable for use in examination by an optical microscope. The cover-slip comprises a planar portion of substantially rigid and transparent material and further comprises a tab contiguous with or adjacent to or attached with the planar portion. The tab is divertable from the plane of the planar portion along a predetermined bending region, thereby allowing holding and displacing the cover-slip e.g. when the cover-slip lies on a flat surface.

Abstract: An apparatus has a) a flat, flexible test tube holder ring, and b) a mechanism to manipulate the angular orientation of the flat flexible test tube holder ring. The test tube holder ring includes: (1) an outer circumference, (2) an inner circumference, and (3) apertures to hold test tubes, wherein alternate apertures have circumferential walls to enable positioning the test tubes higher compared to their adjacent test tubes. The mechanism includes an engagement mechanism that orients the angle of the test tube holder ring. When the test tube holder ring is at one angle, the test tube holder ring is flat and planar, and when the test tube holder is at a different angle the test tube holder ring has a conical shape.

Abstract: A cover-slip suitable for use in examination by an optical microscope. The cover-slip comprises a planar portion of substantially rigid and transparent material and further comprises a tab contiguous with or adjacent to or attached with the planar portion. The tab is divertable from the plane of the planar portion along a predetermined bending region, thereby allowing holding and displacing the cover-slip e.g. when the cover-slip lies on a flat surface.

Abstract: An apparatus consisting: a) a flat, flexible test tube holder ring and b) a mechanism to manipulate the angular orientation of the flat flexible test tube holder ring. The test tube holder ring includes: (1) an outer circumference, (2) an inner circumference, and (3) apertures to hold test tubes, wherein alternate apertures have circumferential walls to enable positioning the test tubes higher compared to their adjacent test tubes. The mechanism includes means to engage and to orient the angle of the test tube holder ring. When the angle of the means to engage the test tube holder ring is at one angle, the test tube holder ring is flat and planar, and when the angle of the means to engage the test tube holder is at a different angle the test tube holder ring has a conical shape.