When most people were addicted to competition and a very few went to explore Silakur, the suburbs of Machi City were in a beautiful manor.

Orly was wearing a moon-white robe, leaning against Arnold, carefully opening a roll of parchment.

Arnold looked at her lovingly, closed his eyes, and quietly acted as a cushion.

"Weighing gas? Interesting experimental report."

Oli looked through the latest journal "Elements" with interest. The author of this report is Laval. He used objects such as coal, lead and saltpeter, iron filings and dilute sulfuric acid, iron filings and dilute nitric acid to heat them on the gun barrel, and then collected the generated gas on the water surface to determine the total amount of "gas" extracted from various substances.

"This device for measuring the weight of gas is very interesting, but is it too limited to the thinking of weighing? 'Animals, plants, and minerals are rich in air'. This conclusion is certainly correct, but it is too simple and too vague."

Arnold opened his eyes, looked at Oli in confusion, and closed his eyes again.

Oli took the opportunity to Arnold's arms, held the scroll above his head, and read softly: "Elasticity is not the nature of air particles. As we know, air particles are strongly attracted by a large number of acidic particles, thio particles and saline particles in the air, and it is easy to change from elastic state to fixed state."

She frowned with Arnold: "Is this acknowledgement to the atoms of all things? I also agree with the atoms of the atoms that there are inseparable particles in the microscopic world, but air does not seem to be a kind of particle. Human breathing will consume a certain component in the air. If it is consumed, the flames under this air cannot burn.

You said, Brother Arnold?"

Arnold nodded in confusion and hugged Oli hard, as if he was afraid that she would disappear.

Since her recovery, Oli's strength has remained at level one. She has never constructed her own basic spell model. Except for constructing the spell model of the Fate Star Mechanics based on "Magic Mechanics", the secret space of her soul has been empty.

"Brother Arnold, I don't really want to rely on the structural foundation of Lord Ace's "Magic Mechanics". Although "Magic Mechanics" is perfect, I yearn for the wind more."

Arnold listened to Oli's murmur and said gently: "I have a little understanding of the latest theory. It seems that it is the phlogistin theory. Gas is the wind element mentioned in the past four elements. Why don't you build the foundation based on it?"

Oli adjusted her posture in Arnold's arms and said softly: "I think gas must be complex. I don't plan to construct a basic spell model before determining the basic composition of gas. Moreover, although the phlogistin theory seems reasonable and the experiment makes sense, it has not been truly confirmed!

I've always been skeptical of the phlogistin theory."

Arnold hugged Oli gently and said in a low voice: "I don't know much about magic research, but I know that if you doubt it, you can't practice it. Since you are skeptical about the phlogistin theory, it's better to do an experiment and see if you can overturn it!"

Oli's eyes lit up, and she kissed Arnold happily: "It makes sense, but it doesn't have to be overturned. Either prove that there is phlogistin or that does not. In short, it needs experiments to verify."

If you want to do an experiment, you need to first collect the most cutting-edge research in this field.

Oli has been reading and thinking about related papers in the Dream World in recent years, and she has accumulated enough theoretical knowledge.

A few days later, the latest issue of the "Magic" journal was released. Oli opened it immediately and happened to see an article published by Betty, "On Air and Fire".

"I believe that most wizards of the Elementary School have discovered that the defined volume of air will shrink after long-term contact with certain substances.

We use sulfur lime aqueous solution, flaxseed oil, and water-moistened iron chips in the air. After a few days, about a quarter of the air is absorbed and the remaining air can extinguish the small candle.

We can think that these substances are rich in phosin, or combustible substances. The remaining gases are different from ordinary air, and they do not contain combustible substances.

Because, if this gas is composed of air and phlogistin and its volume is reduced, it must be denser than ordinary air.

But filling this gas in an extremely thin flask and weighing it carefully, it was found that it was not only unable to balance with the air in the same volume, but was even lighter.

...

Therefore, air is composed of two fluids of different properties, one of which does not show any phlogist at all, while the other fluid accounts for one third or one-quarter of the total mass of the air.

The former is called turbid air, and the latter is called fire air."

Oli looked and thought, the division between fire and turbid air was in line with Betty's phlogistin theory, and it also proved that gas consisted of at least two air of different properties.

"But, gas may not necessarily be two elements, and it may be more."

Oli continued to read Betty's paper while whispering. Betty's greatest contribution to this research was to purify "fire air".

"Using the phosphorus combustion test, it is possible to determine the combination of combustible substances and fire air, so I think that heat = fire air + phostin. Since heat = fire air + phostin, it is enough to find a substance that has a greater attraction to phostin than the fire air manifests."

Oli continued to think about what exactly can purify "fire air", and Betty gave the answer.

In Betty's previous experiments, it has been found that nitric acid has an immediate effect on metal. Remove the phlogistin of the metal and produces red smoke. In order to prevent nitric acid from heat, it is first allowed to combine with potassium and alkali to fix it. The resulting saltpeter is placed in a flap and distilled with alum oil at high temperature, and nitric acid can be released.

The bladder containing lime milk is tied to the mouth of the bent bottle and absorbs the red smoke. The bladder is filled with a colorless gas. When the small candle in the bladder is lit, it will emit a dazzling light.

Oli immediately left the "Fantasy Country" and came to reality for repeated experiments. Sure enough, she successfully produced a unique gas. This gas not only allowed the flame to burn more violently, but also lasted longer. If it was inhaled into the lungs, it would also have a rare sense of ease.

"This gas can not only burn the flames. If extracted, the remaining air will suffocate the animal! It has great practical value and therapeutic value."

Oli continued to read the journal "Magic" and found that this issue was actually experiments related to Fire Air.

In fact, Betty, Bayern and Logan's three founders of the phlogistin theory discussed and exchanged many times. Based on Betty's experiment, Bayern and Logan used the mercury slag heating method and the black manganese heating method to produce pure fire air.
Chapter completed!