Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1899-11-25
TTo pE CONTINUED
SCIENTIFIC MISCELLANY,


The clcctroiytic process for making |
rciicctora for Hoarch-llrhts and other |
purpoaos. nv described to the British aa.
rocintion by Mr.. Cowpof- Coles, IA us
simple "a u IN promising ~ important |
roaulta. a coating OF metallic silver b. |
deposited chemically on glass convex |
mould. The coated mould Is then tm- |
mcrHed In an cluctrolytc " copper sui |
phnte aud rotated nbout nftecn times u |
minute, when q firmly.ndherIng coat |
ing OF copper II deposited on the silver, |
giviur "A substantial backing Tho all |
Yer and copper form the reflector,
which IL separated from the mould By
the unequal expansion on carefully
heating In water bath to 100 degrees
r. The silver has the brilliant polish "
the mould. and requires only protection
against furnishing. which Dr. best given
by dcpoalting on Il MIN " palladium.
The theory that the vermf0rm APP
pcndiN IL useless rudlmeutnry organ
IL hardly convincing. \ late writer,
| Dr. slaughter. contends that 10 has n
useful function In secrvtlng mucous 10
Intricate the lower inteatinca, ana that
/ Inflammation from obstruction or this
mucus ia the chief exciting cause 81 APP
pendicitls. "a lcss severe Form % the
| disease being due to impaired rirculu-
| tlon In tho appendix. Most caHeH ~
appendicitis known TO this physician
have recovered without operation or re-
| currcncc.
A llnoicum.llkc substance n made
| from roasted leather IN n ithouiah color
factory. The roasted leather II mixed
| with oxldizcd linHccd oil, possibly with
| the addition Of adhesive agents and
gums. such aH shelluc. colophony,
mucilagc. trngacanth. otc. II II then
pressed or rolled upon some coarse fab
tic.
Certain fresh-watcr aigao named by
a French botanlst. NJ. II. iiouilhnc. arr
claimed To- be able 60 absorb arsenic
without Injury. Mt least one species ap-
| pcarinE to derive more benefit Ia
growth from arsenic acid than from
phosphofio acid.
Trains running In tunnels push along
| a column " uir. which adds greatly to
the resistance apart from the Increased
side resistance. This Ia shown by tests
Mr. y. v. McMahon haH been making
on the CITY and south London Electric
railway. Tn. air resistance directly
In front " the locomotive proved 10 h,
between 1 and ~ pounds per square
foot nt speed ~ about n miles an
hour. but u dropped almost ~ nothing
M places where cross pas"agvs Ia the
tunnel give fr,o outlet for the air IN
font. The force required To start and
be cofrcspnndlngly greater than on open
roads The tfactiV. resistance II ~
pounds per ton Of train ut starting but
when a velocity Of 9 miles " reached
pull Of only 10 pounds per ,on n re-
| uulryd to Keep the train In motion. tle-
the resistance to motion Increases, be-
coming about q pounds per ton at ~
miles.
4 kind OF electric HAT iron. called the
ncurot0ne. IL - device FOR spreading
gentle electric applications over the
skin on any portion of the body, a
base plate contains the two electrodes,
which are polished metal plates 80
inches Ions by inch Wide, with a suit
able sap bctlyccn,. n hesible cord con-
ducts the current rom the battery the
strength boiag adjustable by q regu-
iatur on the base, and tho electrodes
are moved over the affected parts an
an iron IN passed over clothoe.
In photographlng the mucous MEM
brnne Of the living stomach. Drr. l.ango
and Mclzlng use stomach tube 2 feet
forE ANA matt al iuvh 10 diameter with
an electric HIGHT at the lower end and
q camera at the upper end, The cuptlcd
stomach H. washed. then distcndcd with
! air. In 10 or 10 minutes 90 or mon"
| successive pictures can Dc taken, the
apparatus being turned Co bring all
pafta into view, and the minute photo
graphs can DC enlarged az desired.
The plaatcring proves Co have an
| ,ficct upun the acoustic properties ~ a
room. Prof. Nussbaum. of Hanover,
reports the beet tcsulta from using pure
gypsum that has been raised to white
heat.
Late testa have shown karrl wood
I L. aaaan hat HaHlaNH
beams Of the former give cheaper and
more iirc-reHlrting fioor than lgh'
rolled beams Of steel.
4 marvel Of ingenuity IL the mcchanl-
cal perpetual calendar constructed In
leisure hours by NJ. Albert Jagut of
Mans, II consists OF but 1--WE wheels
with total Of nincty-siN tccth--and
nine lcavera or catches; yet IL II de-
signed TO indicate the day Of the week,
the date and the month, automatically
for centuries. and TO show the 2gth day
OF February In accordance with OUT
culendar-that b. every fourth year cN-
ccpt the three centenary years In OvcrS
four centuries that arc NOT leap years
The mechanism is operated by thirt
weights, or which one requires Wlndlnr
every nftcrn days. the second u 90 be
wound once a year, while the third acts
IA "a countcrwelght 10 bring tho prln-
clpal wheel 10 IT. starting point once d
month.
A somewhat novel electric omnibus Of
Berlin weighs SO tons with It's lond VI
- pasaengcrs, and has accumulation
Weighing "a ton ana "a half There urt
two motors on each axle. four in all
which are ~ ARRANGED that the wheels
are driven Independently. The
single reduction gcming has d
ratio OF 10 10 on thi
front wheels and 90 s on the roal
wheels, and regulation IN erected b.
meana " acrlos-parallel controllers n
the usual way. The most interesting
departure ~ probably the use Of
collecting bow FOR charging with cur
rent from the overhead wires OF th'
street railway,
whether comets may not be self
luminous n un Important problem tina
may be- solved ere long, according 90
Fronch astronomical Journal Scvcru
yoara ago the rpegtruscupe gave reaanf
FOR puspcctinr mat certuln comets have
n llrht other than that reflected from
tho nun, and IN June the nrst come
on 1889 furnished sim stronger evidence
The fluctuations of brllllancy observe,
cannot be easily explained except ~
variations of light belonging 10 thu
comet itself
A very HIGHT gaH battery. the lnvcn
lion OF NJ getmalu. "a French TELEGRAPH