1 Aug : Breathing component of life was discovered

We all breathe Oxygen but don’t know how it came into existence. It was not that easy to identify what gas is responsible for life ?

Today in 1774, British scientist Joseph Priestley solved the puzzle.


He used a magnifying glass to focus the sun’s rays on a sample of mercury oxide (HgO) to discover that heating this compound produced a gas, oxygen (O2). In this environment a mouse could live four times longer than normal. Theories based on Priestley’s work underpin modern chemistry.

Equipment used by Priestley in his experiments on gases

Although Priestley is often credited with discovering this new type of “air”, German-Swede Wilhelm Scheele made a similar discovery in 1771, although Priestley beat him to publishing. Frenchman Antoine Lavoisier recognized that the new “air” was actually a new element, and he named it in 1777.

The laboratory at Lord Shelburne’s estate, Bowood House, in which Priestley discovered oxygen

Primary source of oxygen for human beings are trees, but with time number of trees have declined. Trees are being cut to support population but no trees are being planted. Half of the country faces flood and other half faces drought. The balance in the ecosystem is diminishing. Plant tress so that you can breathe and live a healthy life.

#Hindi
आप ये तो जानते हैं कि Oxygen गैस जीवन के लिए ज़रूरी है, लेकिन आपको ये नहीं पता होगा कि इसकी खोज कैसे हुई।
1774 में आज ब्रिटिश वैज्ञानिक Joseph Priestley ने oxygen gas की खोज की थी । हालांकि Oxygen की खोज के लिए इतिहास में विल्हेम शीले को भी याद किया जाता है लेकिन Joseph Priestley ने अपना शोध विल्हेम से पहले प्रकाशित कर दिया था । Joseph Priestley ने अपने शोध के दौरान, एक खास तरह की gas का test पहले चूहों पर और फिर खुद पर किया और ये पाया कि ये gas, सांस लेने कि लिए सामान्य हवा से ज्यादा अच्छी है। ये गैस Oxygen ही थी। 1777 में फ्रांस के रसायनशास्त्री Ant-oine Lavoizier ने इस gas को oxygen नाम दिया।