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Tag: france

Articles tagged as France

Gas Masks: An Overview

Posted on June 8, 2020 by Sergio Medoff
The gas mask, a device to help and protect the user from inhaling gas, smoke or other poisonous fumes, have been used for decades by different people and for different reasons.The first use of poison gas in war started in Ypres, France on April 22, 1915 when the German military used chlorine gas to attack French forces, but gas masks have been in existence long before that fateful date...

The History And Beauty Of Agate

Posted on February 12, 2020 by Sergio Medoff
Agate is a semi-pellucid crystallized quartz, comprising banded inclusions of chalcedony.Physical properties of agate are generally those of quartz.Agate is found in all colors of the rainbow which range from colorless to yellow, brown, purple, and pink.Additionally, it comes in green and blue but these colors are very rare...