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. Basham, M.D. _Bankers._--Messrs. Cocks, Biddulph, and Co., Charing Cross. VALUABLE PRIVILEGE. POLICIES effected in this Office do not become void through temporary difficulty in paying a Premium, as permission is given upon application to suspend the payment at interest, according to the conditions detailed in the Prospectus. Specimens of Rates of Premium for Assuring 100l., with a Share in three-fourths of the Profits:-- Age L s. d. 17 1 14 4 22 1 18 8 27 2 4 5 32 2 10 8 37 2 18 6 42 3 8 2 ARTHUR SCRATCHLEY, M.A., F.R.A.S., Actuary. Now ready, price 10s. 6d., Second Edition, with material additions. INDUSTRIAL INVESTMENT and EMIGRATION: being a TREATISE ON BENEFIT BUILDING SOCIETIES, and on the General Principles of Land Investment, exemplified in the Cases of Freehold Land Societies, Building Companies, &c. With a Mathematical Appendix on Compound Interest and Life Assurance. By ARTHUR SCRATCHLEY, M.A., Actuary to the Western Life Assurance Society, 3. Parliament Street, London. * * * * * BANK OF DEPOSIT. 7. St. Martin's Place, Trafalgar Square, London.