薛凤祚是清代一位负有盛名的科学家。他首次将对数引进中国,对中国科技发展做出了重要贡献。对这位在中国科技史上有重要地位的人,现代的通史和断代史著作都未提及,个别科技史虽略有涉及,但语焉不详。一些文献将其籍贯搞乱,其著作也相继散失。致使这位历算名家几近湮没无闻,知者寥寥。一薛凤祚(1599—1680年)字仪甫,号寄 Xue Feng 祚 is a famous scientist in Qing Dynasty. For the first time, he introduced the logarithm into China and made an important contribution to the development of science and technology in China. To this man who has an important position in the history of science and technology in China, neither the general history of modern history nor the books of dynastic history have been mentioned. Although the history of individual science and technology is slightly involved, it is not clear. Some documents mess their native place, and their books are lost one after another. The calendar was almost annihilated ignorant, few people know. A Xue Feng 祚 (1599 - 1680) the word instrument Fu, No. Send