New-York tribune., 1876-07-15

thick as a finger in the middle, and packing the
cement in tightly around il, and, II necessary n3
ing il in place with board until ii haltens, "hue
the water escapes through the tube WltlOut eA.ii-
ing any pressure upon IT. After ~ TO 90 DAYS 'no
opening may be plugged mp.
Asr,TIc CHOrFRA-Dr Bonnafont, in a connlu-
nieation upon the Asiatc cholera read before the
Academy Of Medicine of Paris, enunciates the fol-
lowing general propositions First this disease can
not originate spontaneously in any other country
than India but must reach other regions by trans
poftation, or by germs Of the disease, atmospheric
currents or some other vehicle; second all hygiemc
methods to avert this plague must be initiated and
maintained in the country of its origin; third. that
il is not the dead bodies of animals abandoned on
the soil by caravans of pilgrims nor the number oI
huuan bodies thrown into the Gangcs, that produce
the eruptiOnS of the ASa'c cholera as these pIdcc
tces have prevailed for ages, while appearances Oh
epidemic or ASiatlc cholera IN Europe, AIilca oi
America dates only from the beginning ol thc
present century; fourth ether causes, thcltloie,
must exist for the frequent movements of tiiS
disease and ii is in India that these are to De III
ycsdgated: fifth, secondary cPidcmics NAV pcrn9ps
be developed in points already injected; 6ut WIN
Y nv rare exceptions they never assume the exact
features OF genuine cholera, ana they VIII SeheIdily
fade out ana dlsarpear uh,H Ictiioigeu ny b, m,"
eruption from tEe original starting point. lhele-
fore the special points 10 he considered are the queS
iCns why cholera has remained for centuries III an
endemic and stationary COud ton IN lnda ana why
=
ditons aud the manners aud customs OF the hlndOoS
and pilgrims apparently remain unchanged
TIE GuIorYpE.-A process known as The Clio
type. invented by NJ Gillot, for producing printing
blocks by etching on zinc, has been lately intro
duced very extensively into use in Paris where il is
employed for the illustrations of newspapers and
magazines paper is first prepared by covering
India paper with one or two films Of cclatine son-
tion applied very thinly and evenly and allowed to
dry after which a coating of cold starch paste is
put oI and subsequently little gamboge dissolved
in water. The picture is drawn in fatty ink upon
the paper and laid with its face downward upon the
zinc the surface of which must be well cleaned to
remove al grease. sheet of paper moistcned with
hydrochorc aCd i placed upon it, end above TINS
sheets OF dry paper, aud the whole passed TWO OF
three times through lithogr3phIc press. Inc PACK
of the paper containing the picture Is hen to ne wen
mostencd with water which allows II 10 be removed
from the znc, leaving eehihu te lall! p'ctui' nv
plate IS then washed with soft sponge; anu suga,
Uuently vi h gum water, 10 which niue iiAdio,
chlolic acid has been add d, and the whole allowed
10 dry upon the metal. We now have an Ordl-
pression can be taken rs from 4 lithOgrdpnc
stone; but for relief printing etching IS re-
0uircd. A fatty or lith0,sTaphlc ink Is applied to
he plate and allowed to dry; and over the Whole
surface is then spread by means of tutt OF cotton,
some finely powdered rosn, which attaches to the
greasy particles and impaTts to the lux consistency
sufficient protect the covered parts from he action
of the sun The other portion between the lines ana
letters Is freed from the powder by means of second
Tut Of clean cotton, after which the borders ana
back of the plates covered with shchac Ndiuish'
The plate is then introduced into the etching s0ii-
tion ia kind Of trough, which is made 10 rock back
and forward all the time with the OBJECT of washing
off continually any salt lormed by the aCld INC
precise details If the operators manipulation must
be managed according to The depth Of the etching
required. After the operation IS al"ruated scNerai
times the plate is finally dried, and the white por-
tions Which have not been sufficiently acted upon
are cut ont with narrow saw or VITA graNer, ana
the block is then ready for relief prntl!s