Glass slide set, packaging box for glass slides, and method of setting glass slides

A glass slide set comprising:

• a stack of glass slides;
• and
• a packaging box that houses the stack, wherein
• the packaging box comprises:
• an exit opening through which the stack exits;
• a push opening through which the stack is pushed, so that the stack exits through the exit opening, and
• a push member that is disposed on an opposite side of the stack from the exit opening and capable of moving the housed stack toward the exit opening, the push member having an outer shape larger than the push opening, wherein the stack comprises an upper surface, and a lower surface, and
• the push member comprises:
• a first part that is disposed on the opposite side of the stack from the exit opening;
• and
• a second part that is connected to the first part and comprises an upper part that covers a part of the upper surface of the stack and a lower part that covers a part of the lower surface of the stack,
• the upper part protrudes farther towards the exit opening than the lower part.