The ferrotype and how to make it - The Grian Press

46 THE FERROTYPE.
venting any chemical action on the plate from.
contact with the wood.
Lenses.—There are a great many lenses in
the market, among which it is difficult to choose.
My experience proves that of the smaller Gem
tubes, those of Darlot a Paris are the best ; of
the other sizes there is no groat difference among
the cheap instruments, and if it is desired to pro-
cure a larger tube of the 4-4 size, or even larger,
then it is advisable to procure of the more expensive
manufacture, always keeping in mind
that whatever lenses you may purchase, be sure to
make rapidity of action one of the qualities most
to be desired. A 4-4 multiplier, provided with
nine "Gem" tubes, four quarter and one 4-4 or
extra do, should be enough for most galleries
where the business is confined to the production
of Ferrotypes.
Focussing Glass.—The focussing glass is a
very useful article, and every camera box should
be provided with one. Their use is to magnify
the image on the object glass so as more easily to
secure a perfect focus.
Posing Chairs.—Posing chairs are now in
general use and are in great variety. In select-
ing, choose one of the most g-raceful design and
best tinitiii. A great revolution m the style and
finish of these useful chairs was made, I think,
in 1IS66, by the introduction at that date of
"Sarony's Universal Rest and Posing Chair.**
Mr. JSarony sold immense numbers of them, un-