Brebisson, and other writers, may be obtained, wholesale and retail, of
WILLIAM BOLTON (formerly Dymond & Co.), Manufacturer of pure Chemicals
for Photographic and other purposes. Lists may be had on application.

Improved Apparatus for iodizing paper in vacuo, according to Mr.
Stewart's instructions.

146. HOLBORN BARS.

* * * * *

PHOTOGRAPHIC PAPER.--Negative and Positive Papers of Whatman's,
Turner's, Sanford's, and Canson Freres' make. Waxed-Paper for Le Gray's
Process. Iodized and Sensitive Paper for every kind of Photography.

Sold by JOHN SANFORD, Photographic Stationer, Aldine Chambers, 13.
Paternoster Row, London.

* * * * *

PHOTOGRAPHY.--Collodion (Iodized with the Ammonio-Iodide Of Silver).--J.
B. HOCKIN & CO., Chemists, 289. Strand, were the first in England who
published the application of this agent (see _Athenaeum_, Aug. 14th).
Their Collodion (price 9d. per oz.) retains its extraordinary
sensitiveness, tenacity, and colour unimpaired for months: it may be
exported to any climate, and the Iodizing Compound mixed as required. J.
B. HOCKIN & CO. manufacture PURE CHEMICALS and all APPARATUS with the
latest Improvements adapted for all the Photographic and Daguerreotype
processes. Cameras for Developing in the open Country. GLASS BATHS
adapted to any Camera. Lenses from the best Makers. Waxed and Iodized
Papers, &c.

* * * * *

CLERICAL, MEDICAL, AND GENERAL LIFE ASSURANCE SOCIETY.

* * *

Established 1824.

* * *

FIVE BONUSES have been declared: at the last in January, 1852, the sum
of 131,125l. was added to the Policies, producing a Bonus varying with
the different ages from 24-1/2 to 55 per cent. on the Premiums paid
during the five years, or from 5l. to 12l. 10s. per cent. on the
Sum assured.

The small share of Profit divisible in the future among Shareholders
being now provided for, the ASSURED will hereafter derive all the
benefits obtainable from a Mutual Office, WITHOUT ANY LIABILITY OR RISK
OF PARTNERSHIP.

POLICIES effected before the 30th June next, will be entitled, at the
next Division, to one year's additional share of Profits over later
Assurers.

On Assurances for the whole of Life only one half of the Premiums need
be paid for the first five years.

INVALID LIVES may be Assured at rates proportioned to the risk.

Clai