For a long time the San Francisco Microscopical Society has felt honored by the presence of your name upon its list of Corresponding Members. Thus it would ask a favor. It is about to commence the publication of a Journal to embody its transactions and original papers by members. In the press of professional and scientific could you find time to prepare something of microscopical or biological interest for us, either with or without illustrations, which we would have executed in the best manner. If you could furnish me with such a paper we would esteem it a very great honor.