tive professional duties, it has been only at his leisure that_
DR. DIAMOND _has been enabled to give his attention to Photography, which
has been the main cause of the delay complained of; but the delay will
prove an advantage, for such important improvements are almost daily taking
place in the art that works published a short time since are becoming
comparatively useless._

HUGH HENDERSON. _1st, Black Japan varnish is very improper for your
positive pictures; it often cracks, and is long in drying. Black lacquer
varnish, procurable at Strong's, the varnish makers in Long Acre, is the
best we have been able to procure. 2nd, The solution for development will
keep any length of time; you may use it by dipping or otherwise_.

W.C., _who recommends the use of a plate glass bath enveloped in gutta
percha, is informed that we have had such a bath in use for many months,
and it answers our purpose exceedingly well_.

ABRAHAM. _As we have often said before, we think that a good lens requires
no "actinic" focus to find. In a properly constructed lens the chemical and
visual foci are identical; and we would ourselves not be troubled with the
use of one in which they differed. Our advertising columns will point out
to you where such a lens man be procured. We believe, where there is a
difference between the two foci, chemical and visual, that other
distortions also take place, accounting for some of the unpleasant effects
complained of in Photography._

_A few complete sets of_ "NOTES AND QUERIES," Vols. i. _to_ vii., _price
Three Guineas and a Half, may now be had; for which early application is
desirable_.

"NOTES AND QUERIES" _is published at noon on Friday_, _so that the Country
Booksellers may receive Copies in that night's parcels_, _and deliver them
to their Subscribers on the Saturday._

* * * * *

{355}

WESTERN LIFE ASSURANCE AND ANNUITY SOCIETY.

3. PARLIAMENT STREET, LONDON.

Founded A.D. 1842.

* * * * *

_Directors._

H. E. Bicknell, Esq.
T. S. Cocks, Jun. Esq., M. P.
G. H. Drew, Esq.
W. Evans, Esq.
W. Freeman, Esq.
F. Fuller, Esq.
J. H. Goodhart, Esq.
T. Grissell, Esq.
J. Hunt, Esq.
J. A. Lethbridge, Esq.
E. Lucas, Esq.
J. Lys Seager, Esq.
J. B. White, Esq.
J. Carter Wood, Esq.

_Trustees._--W. Whateley, Esq., Q.C.; George Drew, Esq., T. Grissell,
Esq.
_Physician._--William Rich. Bash