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. * * * * * BENNETT'S MODEL WATCH, as shown at the GREAT EXHIBITION. No. 1. Class X., in Gold and Silver Cases, in five qualities, and adapted to all Climates, may now be had at the MANUFACTORY, 65. CHEAPSIDE. Superior Gold London-made Patent Levers, 17, 15, and 12 guineas. Ditto, in Silver Cases, 8, 6, and 4 guineas. First-rate Geneva Levers, in Gold Cases, 12, 10, and 8 guineas. Ditto, in Silver Cases, 8, 6, and 5 guineas. Superior Lever, with Chronometer Balance, Gold, 27, 23, and 19 guineas. Bennett's Pocket Chronometer, Gold, 50 guineas; Silver, 40 Guineas. Every Watch skilfully examined, timed, and its performance guaranteed. Barometers, 2l., 3l., and 4l. Thermometers from 1s. each. BENNETT, Watch, Clock, and Instrument Maker to the Royal Observatory, the Board of Ordnance, the Admiralty, and the Queen. 65. CHEAPSIDE. * * * * *{420} THE PHOTOGRAPHIC INSTITUTION, 168. NEW BOND STREET, NEXT THE CLARENDON. * * * An Exhibition of Photographic Pictures By the best English and Continental Artists will be opened at the PHOTOGRAPHIC INSTITUTION, 168. NEW BOND STREET, on THURSDAY, APRIL 28. The Collection will include a great variety of new and important Pictures recently taken by eminent Photographers, and some of the best specimens from the late Exhibition at the Society of Arts.--Admission 6d. * * * CALOTYPE PORTRAITS. (_By Licence of the Patentee._) MR. PHILIP DELAMOTTE begs to announce that he has concluded an arrangement with the Patentee, Mr. H. F. Talbot, which enables him to take Portraits by the newly-discovered Collodion Process. The advantages which this process offers are,--Excellence of Likeness, great Convenience, and the opportunity of Multiplying copies of the same Portrait to any extent. These Portraits have the appearance of beautiful mezzotint engravings, with the superior accuracy which Sun-painting must insure. One moment suffices to obtain the likeness, and no constrained position is required. Hence a happy expression of face is instantly caught, and young children may be taken without difficulty. To those who wish for several copies of the same Portrait, the Calotype offers every facility, as an unlimited number of impressions may be printed, by the agency of the sun, from the glass plate. These will all be exactly equal to the first, and may be had at a moderate cost. TO ARTISTS AND SCULPTORS.