There are many so-called gold panning machines in this era, but most of them are actually not easy to use, and many of them are even the whimsical products of civil science, the kind of Wang Duoyu ecstasy.

After all, at such a relatively young historical stage of scientific and technological development, no matter whether they are professional or not, everyone wants to do something inventive, and some people do succeed.

Compared to those king multi-fish gold panning machines, the ore washing tank seems simple, but in fact it is very efficient.

In the original history, it was also the case that the use of the washing tank was a turning point in the gold rush, and people abandoned the original gold panning plate and all kinds of flashy gold panning machines, and began to use a large number of homemade washing tanks.

Since then, the washing tank has become more and more popular and is still used regularly even in the 21st century.

Ma Whistle explained in detail the construction of the washing tank, and then the people began to work, cutting down the timber and building the washing tank as the building was built.

During this time, the horse whistle continued to probe the river using metal detectors, and then marked the results on a map.

A shoal.

"Wolf, let's make a record, there may be very rich gold mines in the vicinity, give priority to mining." Ma Sentry held the detector in his hand and said without looking back.

The wolf immediately marked the map and marked a section of the river with the number "2", which means "very rich".

"This paragraph seems to be relatively rare." Walking a little further, the sentry watched as the fan rotated smoothly.

The wolf immediately marked a "0" on the map, meaning "less gold", or that the probe was not responding.

In this way, the two of them repeatedly probed and recorded along the river to prepare for the next gold panning, and they were accompanied by a few guards.

"If only this detector could be a little bigger and more sensitive." At the end of the day's work, the wolf couldn't help but sigh.

"First of all, we have to have a better battery." The horse whistle replied.

"Better batteries?"

"yes, the battery is a big problem." Ma Whistle said from the bottom of his heart that even before he was reborn, humanity faced a bottleneck in battery technology that was difficult to break through.

For example, the biggest limitation of new energy vehicles is the battery.

"So the detector can't be improved?" The wolf sounded a little lost.

Ma Whistle smiled: "Actually, it's useless to improve it, do you really think it's used to explore gold mines?" ”

People didn't understand.

You were using a probe to explore gold just now, why do you now say that this is not for gold exploration?

Ma Whistle continued: "At the end of the day, it was our luck that hit this high-quality gold mine. The detector is only a secondary aid, that is, it is only stronger than the human eye. ”

"The so-called 'abundant gold' or 'less gold' detected by this thing is only talking about the shallowest gold deposit, not the gold content in the real sense."

"Maybe the '2' on the map is just a few grains of gold stuck between the cracks of the pebbles, and the '0' has ten tons of gold buried deep underground."

After a pause, he continued, "So, just refer to this map and don't take it too seriously. ”

The wolf asked, "If a metal detector is not suitable for gold detection, then what should be used to detect it?" ”

"Hmm...... Geology bar. Ma Whistle didn't understand geological prospecting either, so he vaguely mentioned it.

I don't know if there was any modern geology in this year......

Half a month later, a large ore washing tank was built, and the gold panning work of the westward team was officially launched.

Metal detectors obviously don't make much sense compared to serious geological exploration, but they are still a rare weapon for the rough artisanal gold panning industry of this era.

Historically, California gold diggers have relied on God to bless them for gold.

In contrast, the Apache people who went west had at least a little reference from the metal detector, which was not very accurate, but at least it was much more reliable than God.

In addition, the efficiency far exceeds that of the gold panning trough, so as soon as the gold panning work begins, the lumber yard immediately enters a state of getting rich every day.

Literally, the daily income is 10,000 dollars.

Buckets of sediment were dug out of the river and poured into the washing tank, where the water was then used to hit the sediment along the slope of the trough.

After repeated scouring, most of the sediment returned to the river with the current, and the gold and a small amount of soil were stuck in the planks of the washing tank.

Then the workers remove these sediments with extremely high gold content and do further manual gold panning to obtain relatively pure gold.

Most of it is sand-like placer gold.

There are also large pieces of dog's head gold, the size of which reaches the level of a finger or even a baby's fist, and this kind of large piece of gold naturally does not need to be washed, just reach out and pick it out.

One day in July.

The horse whistle is counting the results of the first week's gold rush, with a large scale in front of him.

It was the height of summer, and the climate in the forest was hot and humid, and even though he was wearing only a pair of shorts and his feet were still soaked in the water, he still felt stuffy.

But the sweltering heat can't offset the pleasure of gold.

"Seventy-nine and a half kilograms!" This is the result of his final inventory.

Nearly 80 kilograms of gold, converted into US dollars, is about 50,000 US dollars.

Of course, the real figure should be less than 50,000 US dollars, after all, the specific purity of these gold has yet to be determined, but there are still 30,000 US dollars.

Eighty kilograms of gold, this is the income of the first week of gold panning.

On average, the daily income is more than 10,000 grams of gold, and there is no doubt that "10,000 gold a day".

"Good fellow, it's more profitable than selling arms." Duyan exclaimed.

"It's not about making money...... It's picking up money! The wolf said.

"Small scenes." Ma Whistle smiled, "In the future, we will pick up money like this every day, and it won't take long to get used to it." ”

He was right. The historic California Gold Rush produced hundreds of tons of gold for the United States over the course of a decade.

From the founding of the United States to the eve of the gold rush, the total production of gold in about 70 years was only a few dozen tons.

Compared with a few hundred tons, the eighty kilograms mined by Ma Whistle and others are just the beginning.

Even if they only mined one percent, or a few tons of gold, in the end, it would be a staggering amount of money.

"Great Chief, how are we going to spend all this gold?" The wolf asked.

Ma Whistle thought for a moment, "First of all, we have to melt down all the gold we produce and make gold ingots. If people see placer gold and dog's head gold, anyone knows that we have a gold mine in our hands. ”

Du Guan said: "I think it is better to simply mint gold coins, our own gold coins...... For example, Apache Gold Coins! ”