Telegram-herald. ([Grand Rapids, Mich.) 18??-1892, 1891-12-27
WIZARDS or THU VIRl
Remarkable Exhibit 70 be Mads
by the Electromatheans.
BOTS AID GIRLS 1T TIE RICH SCHOOL
VIII Asseatsh all was See rhesr ueaai
verk. k.--Essearis Railways lsxhtssg
syssems. issnAaos asd ksesy
kaswa kieessteAa besscs.

| posed OF members of the physlcs ciasses
At the high school will give an exhlbi-
,ion OF their work. Monday, Tuesday
and Wednesday OF this week. For the
past two years the amount Of practical
laboratory work done by the science
pupils in the Grand Rapids schools hss
probably exceeded that done BY the
pupils in any other high school in the
state. This year more particular At
tention has been given to the study OF
electricity, aud the practical laboratory
work done has unquestionably ex.
ceeded both in quality and quantity
that performed by any college in the
state, with the exception Of the Uni.
yersity.
This year the enthusiasm OF the
glasses became so great that they or
ganixed soeiety Tor tho purpose oI
pursuing the subject OF electricity out
eide OF the regular class hours. There
are thirteen bovs and three girls in the
class and they have worked faithfully
and energeticaily. Asa result "f their
efforts. they have finally decided 20
hold an exhibition illustrating the prac-
tical character OF their work.
In the main corridor, on the lower
floor of the Central building, they have
constructed an electric railway. Ii Is
fifty feet long and is the Edison three
wire system. ~he dynamo of the mo-
ter contains the ordinary I'll" magnet.
and the wheels are run by friction in
stead of gearing. The car Is about fif-
teen inches long aud resembles the or
dlnary electric car.
Al, Their Own Dee <s.
The complete railway y, designed
and constructed by members Of the
class. On each side of The road the
Peninsuiar electric COMPANY will make
| q display of fancy chandeliers, thus
furnishing light for the hall.
In the main physical laboratory an
exhibition Of the household uses OF
electricity will bs made. Sewing ma
chimes, alarms, bells. ETC., will oe oper-
ated by electricity, and practical Illus
trations will be afforded of the number
| OF uses electricity can bc put to IN tue
economy Of the household.
Two of the young ladies' have con-
structed a telephone system. and have
drawn diagrams illustrating different
systems. These diagrams have been
| made from practical work.
Al another taLlc = large number OF
incandescent lamps are shown. Dia-
grams are exhibited showing the
various forms Of incandescent Tampa.
Tho resistance of the lamps is cal
culated. and the candle power is shown
by means of photomcter. Driven by
the main motor is rotating disk Of
differsntly colored lamps. The effect 10
4 1vvyy Peettys -4iS-ss. =
Different forms Of batteries Are on ex-
hibitiou, and Leclanche, gravity,
Daniels, Grove, bi-chromate, aud other
forms of cells are shown. A atorage
battery, complete IN all the detaile. has
been constructed and ls on exhibition.
large number OF electromagnetic
have been made. One of these hat
sufficient power TO lift I 900 pounds
Of magnets will be shown.
Ayoung electrical genius in the class
has constructed an alternating three.
phaze dynamo. This 10 the latest
thing IN electrical motive pro
ducers, and 10 the inven,
ton of q German electrician. IL has
threo alternating currents instead ol
two. as all previous alternating current
dynamos have had. The Young man
constructed his model from the draw
ings made by the German inventor an
published in the electrical journals OF
this country.
An Electric Lighting System.
In ono corner of the room a small
plat, about two and one-haif fee'
square, has been arranged. This u
equipped with miniature buildings and
trees and will be lighted oy tiny mean
descent lamps.
In the chemical laboratory, four
| electrical fountains have been con
forms OF electrical apparatus will be
exhibited.
An electro. plating plant will also bs
! constructed. The power 10 furnished
by the laboratory dynamo. but all ths
preparations will BE arranged by mem
bers Of the class.
The general motor has bcen placed
, in charge of one of the boye. and IL
parts aud action will be explained s,
him.
In the recitation room, q model OF /
city. containing high buildings. shade
trees, etc, has been constructed. ans
the streets of this miniature munlci
pality will he lighted by the tvs
methods. the tower and the low lsgh
systems. These are arranged so one .
both may be operated st a time. and /;
practical illustration of the two meth
ods of lighting may b obtained. Thi
10 an admirable feature, exhibiting =
II dors the real lighting effect, Invested
OF ali tseorislng.
Evesv Practicable Appiieasssr.
The entire exhibition will include ars
lights. batteries, bells, alarms, dynsmos
ncsndsscent lights, frlctsonal or static
machines, motors, telephone, telegraph
electro plating apparatus, magnets
luminous fountains. A railway kystenl
| and several other devices.
The members of the socsety wili have
an account of the work accomplished
printed IN pamphlet form. winch Wi
also contsia the constitution and Oh
jtcts OF the society.
The boys and girls have been ~orkiny
every night until s O'Clock for sesefs
weeks 60 make the display . saccess
TIE entire exhibition shows exceilen
mechanical ability, apd wouid be I
credit TO any educational institution n
t,Ie country. for every article is a. az
tuai working piece Of spparstns To
| building = II Da kept ogen afternoon
and even nFs, and tire industry and ia
senuftv os tissy nsenfsers of ttse soeisf'
should command = thorough srprr
| clspoa ef the efforts they nave made