Back Numbers. Parties requiring Back Numbers are requested to make immediate application for them; as the stock will shortly be made up into Sets, and the sale of separate copies of the early Numbers will be discontinued.

M. W. B.'s Note to J. B. has been forwarded.

A. T. F. (Bristol.) Our Correspondent's kind offer is declined, with thanks.

Sigma is thanked: but he will see that we could not now alter the size of our volumes.

W. C. H. D. will find, in our 6th Vol, pp. 312, 313., his Query anticipated. The reading will be found in Knight's Pictorial Shakspeare.

H. E. who asks who, what, and when Captain Cuttle was? is informed that he is a relation of one of the most able writers of the day—Mr. Charles Dickens. He was formerly in the Mercantile Marine, and a Skipper in the service of the well-known house of Dombey and Son.

Mistletoe on Oaks. O. S. R. is referred to our 4th Volume, pp. 192. 226. 396. 462., for information upon this point.

Mr. Sims is thanked for his communication, which we will endeavour to make use of at some future time.

Iota is informed that the Chloride of Barium, used in about the same proportion as common salt, will give the tint he desires. His second Query has already been answered in our preceding Numbers. As to the mode of altering his camera, he must tax his own ingenuity as to the best mode of attaching to it the flexible sleeves, &c.

We are unavoidably compelled to postpone until next week Mr. Lawrence on the Albumen Process, and Mr. Delamotte's notice of a Portable Camera.