Image Number 2 for United States Patent #4624835.
A microcentrifugation tube for the preparation of a sample for examination under an electron microscope is disclosed. The tube has a bore extending from the top of the tube to the base of the tube. The bore includes an upper section comprising inner walls which taper conically inwardly toward the base of the tube at an included angle of less than 25.degree. and a lower tip extending from the lower end of the upper section to the base of the tube, wherein the lower tip has a cross-sectional shape sized to accommodate the slicing of such a sample on a microtome when removed from the tube.