...In the Moorpark, and generally in the Hemskirke, the stone presents a singular character in being perforated, with a bundle of fibres passing through the perforation from end to end... 
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Stonein the bladder is fortunately rare in the cow, but when present it should beremoved to obviate crushing and perhaps perforation of the organ duringcalving...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The perforation results in a vestibule which gives access to the chamber itself...
J. Henri Fabre 「Bramble-bees and Others」
...Other arm bones found showed the same olecranal perforation...
Gerard Fowke 「Archeological Investigations」
...There are similar implementsin the collection, but with a single terminal perforation...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...The rim is rounded, and the opposite faces are concave,with a perforation in the middle...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...There is no distinct handle, but provision is made for thethumb by a deep, sloping groove; for the index-finger by a perforation,and for the other three fingers by separate grooves...
Otis T. Mason 「Throwing-sticks in the National Museum」
...He found a perforation at the top forming an arch of great width and height, and above it, at the very summit of the peak, were loose pieces of granite of considerable size...
Matthew Flinders 「A Voyage to Terra Australis」
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