Top surfacesimple structures

Top coverings may be loosely classified as fabrics, skins or plastics.

Epidermis/ skin Hair shaft

Sweat gland

Sebaceous gland

Erector pili muscle

Epidermis/ skin Hair shaft

Sweat gland

Sebaceous gland

Erector pili muscle

Grain

Junction of grain and corium layers

Corium

Flesh

Figure 3.3 A cross-section of animal skin (cattle hide). Mammal skin has three layers: the epidermis or grain, the corium and the flesh. The epidermis contains the hair follicles, sebaceous and sweat glands. The corium is made up of a complex three dimensional network of fibre bundles. Once tanned, it is the corium layer that is responsible for the characteristic strength and tear resistance of leather. The flesh layer consists of subcutaneous membrane and fat cells and is usually removed before the leather is tanned

Grain

Junction of grain and corium layers

Corium

Flesh

Figure 3.3 A cross-section of animal skin (cattle hide). Mammal skin has three layers: the epidermis or grain, the corium and the flesh. The epidermis contains the hair follicles, sebaceous and sweat glands. The corium is made up of a complex three dimensional network of fibre bundles. Once tanned, it is the corium layer that is responsible for the characteristic strength and tear resistance of leather. The flesh layer consists of subcutaneous membrane and fat cells and is usually removed before the leather is tanned

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Wood Working for Amateur Craftsman

Wood Working for Amateur Craftsman

THIS book is one of the series of Handbooks on industrial subjects being published by the Popular Mechanics Company. Like Popular Mechanics Magazine, and like the other books in this series, it is written so you can understand it. The purpose of Popular Mechanics Handbooks is to supply a growing demand for high-class, up-to-date and accurate text-books, suitable for home study as well as for class use, on all mechanical subjects. The textand illustrations, in each instance, have been prepared expressly for this series by well known experts, and revised by the editor of Popular Mechanics.

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