6. FIG. 409 Muscles connecting the upper extremity to the vertebral column. (See enlarged image). The clavicular insertion of this muscle varies in extent; it sometimes reaches as far as the middle of the clavicle, and occasionally may blend with the posterior edge of the Sternocleidomastoideus, or overlap it.
In typical commercial aluminium anodizing processes, the aluminium oxide is grown down into the surface and out from the surface by equal amounts. So anodizing will increase the part dimensions on each surface by half the oxide thickness.
For testing the hardness of steel balls by the rebound method a blacksmith's anvil was recommended by the 1942 Edition of ASM Hardness and Hardness Measurements handbook! Shore's hardness tester is used little today however his hardness/resiliency scale for elastomers Shore's durometer is the industry standard.