Boxes may be made of durable material such as wood or metal, or of corrugated fiberboard, paperboard, or other non durable materials.

Rectangular Box

Boxes may be made of durable material such as wood or metal, or of corrugated fiberboard, paperboard,…

A pipecutter is a type of tool used by plumbers to cut pipe. Besides producing a clean cut, the tool is often a faster and more convenient way of cutting pipe than using a hacksaw, although this depends on the metal the pipe is made out of.

Pipe Cutter

A pipecutter is a type of tool used by plumbers to cut pipe. Besides producing a clean cut, the tool…

Pictured are diagrams to illustrate modifications of receptacle in longitudinal sections of flowers. The receptacle produces a flat ring which may surround the ovary.

Longitudinal Sections of Flowers

Pictured are diagrams to illustrate modifications of receptacle in longitudinal sections of flowers.…