In the case of wholesale lots, a tolerance of ten per centum net shall be allowed in shell eggs fixed by this act¹ if eight per centum of the eggs within the tolerance have an air cell three-eighths of an inch or less in depth, and in which is permitted slightly visible germ development plainly visible, mobile yolk, and slightly watery whites. The remaining two per centum may include all other defects. In the case of retail sales, at least ten eggs in each dozen shall conform to the minimum requirements for fresh eggs, and not more than two eggs in each dozen shall fall within the tolerance, as above provided in the case of wholesale lots.