Maryland independent. [volume] (Port Tobacco, Md.) 1874-current, 1886-09-03
Study AND WORKSHOP.


Nrw process Of making iilvii,in
ting and fuel gas has been oeEls "STdrio
,roduct Of which is known as lcin lao;st,
tas. Prof. James Bartlett, oIn.n;I,bt /
tale College, and Proi. u: D I,5ool.
Kendall. New York School oil leOi iii
Igv. after thorough test, state t Ia
he invention will prove to be the Do''
Illuminating gas known. :,
AN improvement in the DRIVING "a
rrinding stones and emery Whcois "a.
hat bv which the wheel is given M. =.
nprocating lateral motion III a1u -t I,g
20 its rotation. 1t is found tiiav ~
making the urindstone move ana keePl
nc the tool still more perfect Iesuio
attained, while the detached Ps.4 20
lies Of steel have an opportunit'
lroE off the grindstone instead u tho
ng crushed into it, and the wear ., o Sro
stone and the heating OF the tooi "iO
both greatly diminished.
Now IS q good time to make sure ~
| ightning-rod connections, and espeGarH1i
! ly that they are well grounded. lno
great ma GRITTY of rods nov erected aio
| deficient in their ground conhGctlono'
md consequently are praeucaly u,o
less. This is the reason Ut 50 may
Instances Of damage, even When puIu
ngs have rods. In general, the fou -
simply stuck down two or three i1ev
iecp into dry Garth, which y ao9uv Wy
same rs if tho lower end OF the w
were ibclo5ed in bottle; such rous Slo
fatally defective The only chance LOT
safety is with good ground counec-
non. The risk Of damage IS less WIN,
put a rod than with one badly conhec'e"
10 the earth
IT has been discovered that the faded
INK on old documents, papers, parch,
ments, etc. may be So restored as ~
render the writing perfectly iegloie,
The process consists in molstehlhS tho
paper with water, and then passing
over the lines a brush which has been
wet in q solution of sulphide OF ammo
hiA Tie writing will immediately ,aP-
pear quite dark in color: and tins color'
in the case of parchment, will be pre-
served, On pape', however, the color
gradually fades again, but may be re,
stored at pleasure by the application Oh
the sulphide. The explanation OF the
action of this substance il that the IRON
which enters into tho composition OF
the ink is transformed by the reaction
into the black sulphide.
PLUMBERS and drain-layers are the
doctors best friends, in certain sense
Physicians must study for years pelore
they are allowed to cure people VINO
already are sick, but many men take
up, without any apprenticeship at all,
this business Of drain laying and
plumbing, on which, more than any
other one thing, the health of q city
whole population depends. Instead OF
being paid for his work, it would DC
more in accordance with the fitness OF
things to have plumber of this sor'
directly under salary from the doctor
and undertaken. Every householder
should without delay see that his draln'
are in good order, and that no Leakage
from them makes a depository of filtl
beneath his cellar Men wonder some
times why their vitality appears to b.
deserving them. The reason may D.
that the earth beneath their homes
poison soaked with sewage.
AN Improvement has been made Il
the Honigman soda or iireless locomo
tive, a specimen Of which was tried o.
the Adams Street Passenger Rail
way, Chicago, few months age
1t is new method of eyaporatin
the water out OF the catlsticsod
solut on after it has become to
dilute to be effective in heat
ing. The method consists in inyertin
the process. The soda remains in ii
own tank, next the water boiler, int
which high-pressuro steam is turne
from stationary boiler. The raise
temperature of the water is commun
Gated to the soda. which is..sl.sa :1iacan
munication with the air. The water i
the soda is thus driven off until tn
boiling point of the soda solution
equal to the temperature Of the steal
which is being used for heating, afte
which the soda engine is disconnecte
from the stationary boiler, and is read
for use.