The reason for mosquito repellent is spiral, you will not expect ...

There are lots of mosquitoes in the summer, one of the easiest and most convenient mosquito repellent and mosquito repellent measures that people often use is mosquito repellent / mosquito repellent.

People have ever wondered, why mosquito incense is not as straightforward as other common incense but has a spiral design. The cause behind is very interesting.

Mosquito-repellent incense incense burns for longer time than rod-shaped mosquito incense.

According to research, mosquito incense was invented by a Japanese man named Eiichiro Ueyama. Mr. Ueyama was born into a farmer family specializing in growing oranges. Growing up, Ueyama moved to Tokyo to live and study and had certain achievements, being one of Fukuzawa's elite students.

At the beginning of experimental inventions, mosquito incense is shaped like other straight incense sticks. The raw material used is the pulverized powder of Pyrethrum, a genus of flowering plants in the Asteraceae family.

Through research, it was discovered that mosquitoes can be killed by burning incense. In 1890, rod-shaped mosquito sticks were first born.

However, rod-shaped mosquito sticks have many shortcomings, can only burn for about 40 minutes, once burning three trees to work, easy to break, easily blown by the wind.

To improve these issues, Mr. Ueyama has been studying for many years. Until one day, his wife discovered a snake in the yard and told him.

Seeing the snake, Ueyama has an important design hunch. From there, he converted mosquito incense into a spiral. By 1902, spiral-shaped mosquito sticks could burn up to 6 hours continuously , officially born.

Until now, many people are still using this product to chase mosquitoes.

1. The 9th grade student invented the mosquito repellent from tea residue