察舌辨症新法
1.序
二家最為細膩，凡相似相異之處，皆能分別清楚，用筆描摹，比擬形狀，俾後學無誤認之處，可謂大有功於斯世。惜察舌一法，二公未有專書，世所傳者，惟傷寒舌鑑、溫疫舌鑑而已，欲求其如脈學之詳細者，未之有也。瑞因用心三十餘年，將診斷試驗，醫治得效，歷歷不爽者，筆記於冊，以授徒輩，未敢自以為是也。庚戌，鎮郡同志袁君桂生等創辦《醫學扶輪報》，以昌明醫學，瑞舞附驥，分任印費報料之責。至庚戌歲冬，諸君有退志者甚多，印費報料因而缺乏，將成中止之局。瑞濫竽充數，刻印未終，至辛亥八月，而瑞等之《扶輪報》，亦與清鼎同時革命矣。今紹興醫會、上海醫會閱報諸君，時有來函，向袁、楊二君索閱全稿者。此皆閱《扶輪報》之舊友，不以葑菲見棄。殆以管見之比擬描摹，尚有可採處。爰從二君之議，抄錄全稿，加序送《紹學醫學報》社，遵周君小農流通書籍辦法亦拋磚引玉之苦心耳，是為序。伏乞諸大名家誨政，以匡不逮，是幸。\x歲次柔兆執徐春分後三日劉恆瑞自序於京江之有預齋停雲傳舍。\x
The two masters are the most refined and detailed; wherever there are similarities and differences, they can all distinguish them clearly, using the brush to depict and compare forms, so that later students have no place for mistaken recognition—one may say they have greatly benefited this world. Unfortunately, as for the method of inspecting the tongue, the two masters had no specialized book; what is transmitted in the world is only the Shanghan She Jian and the Wenyi She Jian, and to seek one as detailed as the study of pulses, there is none. I, Rui, have therefore applied my mind for over thirty years, recording in notebooks what was tested in diagnosis and proved effective in treatment, unfailingly without error, to teach my disciples, not daring to consider myself right. In Gengxu, Comrade Yuan Guisheng of Zhenjun and others founded the Yixue Fulun Bao to promote and clarify medicine; I, Rui, dancing along attached to the steed, shared the responsibility for printing costs and report materials. By the winter of Gengxu, many of the gentlemen had thoughts of withdrawal, and printing costs and report materials were thereby lacking, about to become a suspended undertaking. I, Rui, filling a post unworthily, did not finish the printing; by the eighth month of Xinhai, the Fulun Bao of us, Rui and others, also underwent revolution together with the Qing tripods. Now the gentlemen of the Shaoxing Medical Association and the Shanghai Medical Association who read the reports often send letters to the two gentlemen Yuan and Yang requesting to read the complete draft. These are all old friends who read the Fulun Bao, not discarding me for my humble offerings. Probably they think my humble comparisons and depictions still have something worth adopting. Therefore, following the two gentlemen's proposal, I copied the complete draft, added a preface, and sent it to the Shaoxing Medical Journal, following Mr. Zhou Xiaonong's method of circulating books—also the painstaking effort of casting a brick to attract jade. This is the preface. I humbly beg the great masters to instruct and correct, to remedy my shortcomings; this would be fortunate. Written on the third day after the spring equinox of the year Rouzhao Zhixu, by Liu Hengrui, self-preface at the Youyu Zhai Tingyun Chuanshe in Jingjiang.