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本处化验科,於五月间,收到张兆瑾先生绿色矿样一种,张先生认为该矿物为某种铜锌矿,故嘱作者代为检定铜及锌。因当时本科亟待分析之矿样甚多,未能随时应命。故张先生於矿样交来之先,曾亲来本科试验室,做过试验,但并无所得。事后始将矿样留下。作者於七月间,始有暇处理这一矿样,遵照张先生的指示,检验铜及锌。
The laboratory department in May received a piece of green ore sample from Mr. Cheung Siu-Jin. Mr. Cheung considered the mineral to be a kind of copper-zinc mine and ordered the author to certify copper and zinc on his behalf. Due to the urgent need to analyze the undergraduate mine samples, failed to be on schedule. Therefore, Mr. Zhang first handed over to the mine samples, had a pro to the undergraduate laboratory, did the test, but no income. After the first ore samples left. In July, the author had time to process the sample and inspected copper and zinc in accordance with Mr. Zhang’s instructions.