After eating, Lu Xiaoman went to check her observation experiment first, the row of waste spirit stones soaked in the acid solution lye, almost twelve hours, finally a few beakers with concentrated acid solution saw a small bubble This reaction change, but this reaction did not make Lu Xiaoman satisfied, she wrote on the experimental record that it was difficult to react with strong acid.

After writing the experiment sheet, Lu Xiaoman started to clean up the table, in order to completely clean up the waste spirit stones that had been soaked in acid, she took out the heavenly fire, opened the lid and put it on the table, and used the Divine Sense Divine Technique to pick up the waste spirit stones in the beakers one by one and put them on the heavenly fire to burn.

As soon as the waste spirit stone touched the small flames of the heavenly fire, it immediately turned into green smoke, leaving only a faint smell of acid, Lu Xiaoman burned it like this, and had a lot of fun.

When there were only a few beakers with strong acid concentrations left, Lu Xiaoman had just burned a spirit stone, and immediately felt a trace of extremely faint spiritual energy from the smell of acid that he was used to smelling, and it was dissipated into the air from the waste spirit stone.

Lu Xiaoman was startled, thinking that it was her own illusion, she picked up another one and tried again, it was indeed a little bit of extremely weak aura, lower than the aura content of the spirit bead, if she didn't feel keen, she wouldn't have found it, after all, this experimental base was built in a first-class empty bead, and the aura was the most intense, and it was easy to ignore this faint abnormality.

This new discovery made Lu Xiaoman very excited, it turned out that strong acid soaking is still useful, but after soaking, it needs to continue heat treatment.

Lu Xiaoman decisively put away the heavenly fire and replaced it with his own Dan fire to burn the remaining waste spirit stones.

Danhuo burns slower than heavenly fire, and the process of spiritual energy overflow is also elongated, which makes Lu Xiaoman's feelings more profound, and he is a little unbelievable while excited, the spirit stone is a hard stone that cannot be split by water and fire, knives, axes, and thunderbolts, so the spirit stones and spirit beads used by people daily are all dug out of the ore veins and polished, before doing this experiment, she didn't dare to think that the residual spiritual energy in the original waste spirit stone can really be squeezed out artificially, and the method is so simple, only need to collect gas and remove impurities, and it can be sold as a commodity.

Thinking of selling, Lu Xiaoman scratched his head, the storage method of gas is, of course, the pressure vessel of the cylinder, she needs to make the special steel for the gas storage cylinder, and this first of all she needs to know the standard atmospheric pressure of the wind and the sound of the world, with this, it is better to further make the pressure gauge to be used on the cylinder, so that the amount of gas remaining in the bottle can be understood at all times, if there is no ready-made standard atmospheric pressure, she has to define one by herself, as the standard unit of measurement of the atmospheric pressure in the wind and sound world.

To measure atmospheric pressure, you must first have a thermometer and hygrometer, to do a thermometer, you must first define the temperature scale, temperature and humidity will affect the change of air pressure, Lu Xiaoman doesn't want the atmospheric pressure she is measuring now, after decades or hundreds of years to be overturned and re-measured, that will bring a lot of trouble follow-up, so if you want to do it, you will strive to do it in one step.

Thinking about what to do next, Lu Xiaoman took the results of her observation experiment out of the empty bead and asked her demon teacher for support.

Ye Zhou took the tools needed for the follow-up experiments, all of which were customized by the clan and then sent, and at the same time, everyone was more interested in observing the results of the experiments, and the waste spirit stones with the highest concentration of strong acid soaked for twelve hours could be reheated to obtain spiritual energy.

This is an interesting new discovery.