Calendar of Flora, by Stillingfleete.

Wanted by J. B. Whitborne, 54. Russell Terrace, Leamington.


Notices to Correspondents.

Books Wanted.—We believe that gentlemen in want of particular books, either by way of loan or purchase, would find great facilities in obtaining them if their names and addresses were published, so that parties having the books might communicate directly with those who want them. Acting on this belief, we shall take advantage of the recent alteration in the law respecting advertisements, and in future, where our Correspondents desire to avail themselves of this new arrangement, shall insert their names and addresses—unless specially requested not to do so.

All Communications should be addressed to the Editor, to the care of Mr. Bell, 186. Fleet Street. They should be distinctly written; and care should be taken that all Quotations are copied with accuracy; and in all cases of References to Books the editions referred to should be specified. Every distinct subject should form a separate communication; all inquiries respecting communications forwarded for insertion should specify the subjects of such communications.

Our Prospectus has been reprinted at the suggestion of several Correspondents, and we shall be happy to forward copies to any friends who may desire to assist us by circulating them.

We have just received the following communication:

"Binocular Compound Microscope.—Will you allow me an exiguum of your periodical for the purpose of explaining a seeming plagiarism at page 32. of my Essay on the Stereoscope? I have just seen, for the first time, the October number of the Journal of Microscopical Science, whereby I learn that Mr. Wenham and Mr. Riddell have anticipated me in the theory of the Binocular Compound Microscope. Up to this time I was not aware of the fact that the subject had received the attention it deserves, and my own suggestions, founded upon a series of careful experiments made during the last eight months, were thrown out for the simple purpose of calling attention to the utility and practicability of a Binocular Compound Microscope.

C. Mansfield Ingleby.