07 March 2017

More than You Wanted to Know about Egg Shells

eggshellstrengthI'm a lover of genealogy and history (click here for a blog about my "other" interest), so reading a newspaper from 1917 is not out of the ordinary for me.  While doing just that this morning, I came across the following item.  Though chickens and their eggs have changed over time, for better or worse, I decided to share the article here.  Enjoy your learning for the day! ;-)

Newnan Herald (Georgia)
19 January 1917, pg. 2


The Great End to End Pressure it Requires to Break Them.
Few people are aware of the wonderful provision made by nature to protect against breakage [of] the egg of a bird, by the use of the arch.

"The fact that no man, no matter how strong he may be, is able to break a sound hen's egg by squeezing it between his hands, applying the pressure according to the axis of the egg, made me try to find out the resistance that an egg can withstand in this way," says G. Herrasti of Westerly, R. I., in describing his experiments in the Scientific American.

"Brown eggs proved stronger than white ones and broke under a pressure averaging 155 pounds, the minimum being 125 pounds and the maximum 175.

"White eggs broke under an average pressure of 112.5 pounds.

"The method employed was as follows:  The egg, setting point upward, was placed on a platform scale and pressure was applied to it by a lever and a jack.  Felt seats conveniently disposed prevented the egg coming in contact with the wood.

"The shells were measured for thickness and found to be .013 inch to .014 inch.  When it was considered that the average diameter of the eggs was 1 3/4 inches some idea may be formed of the enormous strength provided by nature."

We're less than two weeks way from starting seeds.  Luck to all in the upcoming growing season!


Shared at Tuesdays with a Twist.

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