Chapter M: A. and J. L. S. are referred to our No. 172., p. 157

PHOTOGRAPHY. _Dr. Diamond's_ Photographic Notes _are preparing for immediate publication in a separate form. We may take this opportunity of explaining that_ DR. D. _is_ only an amateur, _and has nothing to do with Photography as a profession. We are the more anxious to make this known, since, in consequence of holding an important public office, Dr. Diamond has but little leisure for pursuing his researches._

J. B. S. _will find what he requires at_ p. 277. _of our last volume._