The Evening critic., 1884-09-13
ELECTRICAL STATISTICS.
Data of Interest I'm Connection with
the Philadelphia Exhibition.

Data of Interest i'm Connection with
the Philadelphia Exhibition.
The wonderful exhibition OF electrical ap.
pliances now being held at Philadelphia has
SO strongly directed popular attention TO tho
subject OF electricity that the following COM
pilation OF statistics may be interesting:
COO u. C.--Thales, an early Greek philos.
opher and one Of tho seven wise men, states
that amber, whom rubbed, attracts light aud
dry bodiee," and this seems to have been the
earliest and only acquaintance OF the anclents
with electricity. Lucretius, however, and
others before him, haa discussed magnetism
now regarded as an electrical phenome-
non.
1000 A. D.--The inventor OF the word cleo
htetth Gilbert, OF Colchester, gave n list OF
amberi electricity, derived from the Greek
word electroD, meaning amber.
1872 A!D.-The first electric machine ever
made, "a globe OF sulphur turned by q
handle and rubbed by cloth pressed against
icke.
Hawksbec, noted for his improvements OF the
inventions OF Papin, misunderstanding a glass
cylinder for the sulphur ball OF Won Guoricke.
This was the first use OF glass In electrical
1870 A. D.-Electricity first transmitted from
one place to another by Grey and Wheeler,
who claimed to distinguish conducting and
1898 to 1745-The identity OF electrics and
non conductors, and OF non.electrics and the
mental rssaang their r. action we're
shown by Dufay. Up to this date tho glass
rubbed by cloth was used ir all experiments.
la7SnMushenbrGk, at Leyden, claims to
which honor, however, is contested In favor OF
aburgess OF the same town named Cunens;
also In favor OF one, Kleist canon OF tho Ca
thedral OF Camin, In Pomerania.
1747 Franklin explained the electric con-
ditions OF tho Leyden Jar.
ming and electricity by his famous kite ex-
pertinent.
178O-Franklin made the nrst lightning
conductor.
176s-The first plate machine was con.
eitucted by Rameden.
17s0-Nairn made two.nuid cylinder ma
1775-The eIectrophorus, invented by Volta.
17S2-Volta invented the condenser.
17S6-Galvini made the discovery which led
TO the addition OF the new branch of the SCI
ence which bears his name.
17S7-ooulomb, with his torsion. balance,
Investigated tho laws OF attraction and pro-
pulsiOD.
1sO0-Carlisle and Nicholson decomposed
water by the use OF Volta's pile. They were
the first TO use platinum electrodes.
lSO1-wollaston attributed gaivanic cleo
tricity TO chemical action, and demonstrated
the Identity OF galyanic and frictional cleo
tricity.
1902 --cruikshank improved the construc-
ton OF the pile by disposing the plates horl.
zontally in trough instead OF vertically IN a
column.
ls07,-Dayy obtained for the nrst time by
galvanic agency the metals potassium,
sodium, barium, strontium, calcium and mag.
neeium.
1s13-Davy discovered the electric light and
1S2o-Osrsted first observed the action OF
the current on the magnetic needle.
lo2O-The use OF galvanometer, lines OF
wire ana battery as means OF telegraphing
1S20-Ampere discovered the law OF the
action OF the current on the magnetic needle,
and originated an original theory Of Magnets
le2o-schweigger invented the galvanome-
bility OF metals.
mated zinc for the galyanic battery.
1S32-Dr. Joseph Henry fret established the
TACT that mechanical eirects could DO produced
by galyanic current at q distance, operating
upon magnet or needle, and that the tele-
graph was therefore possible.
1933-About mile OF wire was suspended
In this year by Gauss and Weber at Coffin
| gen TO aid IN their Investigations. Their al
phabet was composed OF right and left relec-
1S37-Electric telegraphing gave the great.
eet promise of becoming practically import.
ant. Cooke and Wheatstone secured patents
| on semaphore or signal apparatus. This same
year steinhill, at Munich, stretched telegraph
wires over the houses for distance OF three
| miles, and telegraphed by reflections OF
the needle by sounding of bells and by print.
ing.
Professor Morse in same year exhibited his
automatic recording telegraph, Ia miles In
extent.
1S40-Cooke & wheatstone patented the
| lrst step.by.step telegraph.
1s4G-Bains electro'ctiemical telegraph was
patented.
| 1s51-rhe firet submarine telegraph was
| laid between Dover and Calais.
1S54-Faraday first announced the effects OF
| lateral induction.
1S6S-Flrst Atlantic cable laid, but failed
| after four hundred messages had been trans.
mltted.
1s05-The telegraph was completed by way
| or the Persian Gulf to India,
| 1SO5-A second cable was attempted, but
1s66-AnOther cable successfully laid. The
| lost cable was found and continued to tho west
ern shore.