eforehand just what kind
of a negative we shall have after we have exposed a sensitive plate to
his influence.

ROUND TABLE PHOTOGRAPHIC EXCHANGE CLUB.

Our suggestion of forming a photographic exchange club, or travelling
photographic exhibit, meets with the warm approval of many of our
members. Next week we shall give directions for beginning and carrying
on our club. We give the names and addresses of members who will act as
representatives. Ernest P. Fredericks, Arlington, New Jersey; Samuel J.
Castner, 3729 Chestnut Street, Philadelphia, Pennsylvania; Walter G.
Sill, 511 Central Avenue, East Orange, New Jersey; Andrew Phillips,
Nunda, New York; C. Roy Baker, 315 W. Dry Street, Salem, Ohio; William
J. Tobey, Washington, Kansas; William C. Davids, Rutherford, New Jersey.

CONSTANT READER asks: "1. Is it possible to photograph from a
moving vessel, and how? 2. Can I take photographs of microscopic
specimens with an ordinary camera, and will you please describe
the method? 3. How can I photograph monuments so that they will
not show black in the picture? 4. What make of plates is the
quickest? 5. How can I photograph a mantel-piece in a hall without
using a flash-light? The hall is rather dark." 1. One can easily
photograph objects from a moving vessel by using quick plates and
making the exposure instantaneous. Successful snap-shots, but not
artistic pictures, have been and can be made from moving trains.
2. An article will soon be published on microphotography for
amateurs. The process requires too long a description for the
space devoted to queries. 3. A cloudy day--not heavy clouds--is
the better time for photographing monuments. A rather slow plate
and a short time exposure will give better detail, and render the
monument or figure with correct color value. Use orthochromatic or
nonhalation plates. 4. The rapidity of the plate is marked on the
box. Some brands of plates are marked with the sensitometer
number, like the Stanley, Carbutt, Seed, etc., and others are
marked with a letter like the Cramer. The sensitiveness of the
Stanley, which is marked "Sens. 50," and the Cramer "C" plate is
about equal as to rapidity. 5. If you cannot use a flash-light for
the mantel, try a long exposure by lamp-light. Place the lamp,
which should give a clear, brilliant light, so as to illuminate
the woo