Scientific American Supplement, No. 832, December 12, 1891Various
Science
Scientific American Supplement, No. 832, December 12, 1891
Various
Science -- Periodicals
Water. 80 cubic cent.
Solution A. 2 " "
I throw this over the plate, and allow it to remain for a few moments,
agitating, then I add to this bath gradually and according to the
results obtained, from one to two cubic centimeters of the solution B.
These solutions should be made with a great deal of care and prudence,
as the sucrate of lime is an accelerator of very great energy.
Moreover, according as the plate has been more or less exposed, we may
add to the developing bath a few drops of a solution of citric acid,
or of a solution of an alkaline bromide. We obtain in this way very
soft prints, sometimes too soft, which, however, are not more free
from fogging than plates developed with hydrochinon (new bath), or
pyro having for accelerators ammonia, potash, soda, carbonate of
potash, of soda, or of lithia. I do not give this process with sucrate
of lime as perfect, but I give it as perfectable and susceptible of
application. If I have undertaken to write these few lines it is
because it has never been brought to my knowledge that up to the
present time the oxides and the alkaline salts of the earthy alkaline
metals have been studied from a photographic point of view.--_Leon
Degoix in Photo. Gazette._
* * * * *
DUCK HUNTING IN SCOTLAND.
The wild duck is a shy bird, apt to spread his wings and change his
quarters when a noble sportsman is seen approaching his habitation
with a fowling piece. You have heard of the ass who put on a lion's
skin, and wandered out into the wilderness and brayed. I have
elaborated a device of equal ingenuity and more convincing realism. It
is my habit during the duck-shooting season to put on the skin of a
Blondin donkey and so roam among the sedges bordering on the lakes
where wild ducks most do congregate. I have cut a hole in the face to
see through, and other holes in the legs to put my hands
through.--_London Graphic_
[Illustration: WILDFOWL SHOOTING IN SCOTLAND.]
* * * * *
A PLEA FOR THE COMMON TELESCOPE.[1]
By G.E. LUMSDEN.
[Footnote 1: Paper read before the Astronomical and Physical
Society of Toronto, Canada, April 18, 1891.]
Public-domain text, read in full here on John Shaqi.
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