Howard

The Howard cell is a glass slide 76mm x 35mm with a central circular island and is used for counting mold fibers and spores in fruit juices, especially from tomatoes. With the K20 coverglass in place a 0.1mm thickness of liquid is contained over the central island. The coverglass has 25 calibrated fields of 1.382mm diameter through which to view the particles. This coverglass removes the necessity of precise adjustment of the microscope and eyepiece graticule in the original method.

霍华德电池是一个76毫米x 35毫米的玻璃滑板，带有一个*圆形岛，用于计算果汁中的霉菌纤维和孢子，尤其是西红柿。 在K20盖玻片就位的情况下，中心岛上有0.1毫米厚的液体。 盖玻片具有25个直径为1.382mm的校准区域，通过该区域可以观察颗粒。 这种盖玻片无需在原始方法中准确调整显微镜和目镜刻度。