The New Year's Day and Lantern Festival holidays in the 13th year of Hongzhi passed quickly, and the talented scholars returned to their heavy daily work from various poetry gatherings and cocktail parties.
Li Cong, the governor, passed the examinations in his six years in office, and with this achievement, he was directly retained in Beijing and appointed as the right assistant minister of the Ministry of Revenue. The prefects and county magistrates who accompanied him to Beijing were also commended, and the Ministry of Personnel counted their achievements, and they would be promoted after the three-year examination or the next major assessment.
After the officials who presented the sweet potatoes left, the ice broke and the river opened, and the ground warmed up, so sweet potato planting was naturally put on the agenda. The farmers brought by Li Cong guided the eunuchs of the Siyuanjian to grow potato seedlings in the greenhouse. Ryan Cui, who wrote the planting guide, often postponed the work of compiling the Huidian and went to the inner garden to record the planting time, water consumption, daily germination status... If there were yellow leaves or diseased leaves, he would also ask in detail the reasons and remedies.
It happened that a glass craftsman familiar with his family had made a microscope with a good magnification that could observe leaf cells, so he brought this microscope into the palace. When he encountered new seedlings that had not grown long or had yellow leaves, he would use tweezers and a knife to thinly shave off a piece of epidermis, sandwich it between a crystal-ground slide and a cover glass, and draw a cell picture while observing it, and then compare it with normal leaf cells.
As for how to treat it, that should of course be left to the experts to study.
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