Monthly Bulletin - Clpdigital.org

Kapp, Gisbert. Verminderung der vagabundirenden erdstrome bei
elektrischen bahnen. i,8oow. 1896. (In Elektrotechnische
zeitschrift, v.17, p.43.)
Plea for increased number of feeders.
Knudson, A. A. Cause and effect of electrolytic action upon underground
piping systems. 11,200 w. 111. 1901. (In Journal of the
New England Water Works Association, v. 15, p.244.)
Advocates double trolley system as the only remedy.
The same, condensed. (In Engineering record, v.43, p.322.)
Corrosion of metals by electrolysis. 6,000 w. 111. 1903. (In
Transactions of the American Electrochemical Society, v.3,
P-I95-)
With reference to stray currents and injurious effects. Deals largely with
testing, giving history of surveys in vicinity of New York city.
Discussion.
The same. 5,000 w. (In Electricity, v.24, P- 2I 7, 2 3 0 -)
Effect of joint resistance on railway electrolysis. 1,400 w. Dr.
1900. (In American electrician, v.12, p.119.)
Shows that electrolysis is not always prevented by the independent return and
advocates double overhead or underground construction as the only perfect
method.
Electrolysis in Jersey City. 1,700 w. 111. 1899. (In Engineering
record, v.39, p.233.)
Report giving many tests and recommending more frequent tap connections
from return wire to rails.
Electrolytic corrosion of water pipes at Bayonne, N. J. 3,000 w.
111. 1904. (In Engineering news, v.52, p.437.)
Rapid corrosion of steel and lead pipes.
Remedies for electrolysis. 2,400 w. 111. 1906. (In Cassier's
magazine, v.30, p.337.)
Double trolley is a complete cure, but most of the attempts have been merely
palliative. The following are considered:—
1. More perfect bonds at the joints and improving the track return by auxiliary
copper feeders.
2. Making pipes part of return circuit by bonding to rails or direct to power
house negatives.
3. Insulating pipes from the ground.
4. Insulating joints in mains.
Krohn, Sigvald. Ueber messungen der elektrischen strome in den
stadtischen rohrleitungen. 2,000 w. Dr. 1901. (In Elektrotechnische
zeitschrift, v.22, p.269.)
Larsen, Absalon. Ueber den elektrolytischen angriff elektrischer
strome auf eisenrohren in erde und die dabei auftretende polarisation.
1,200 w. 1902. (In Elektrotechnische zeitschrift, v.23,
p.841.)
Ueber periodische stromwendung als mittel zur verringerung
elektrolytischer zerstorungen durch vagabundirende strome.
1.900 w. 111. 1902. (In Elektrotechnische zeitschrift, v.23, p.868.)
Gives illustration of gas pipes which were subjected to tests showing that
periodically reversing the current tends to diminish the destructive effects of
stray currents.
Leybold, W. Destruction of gas-pipes by means of electricity. 3,500 w.
1901. (In Electrical engineer, London, v.34, n.s.28, p.372.)
Lindeck, St. Ueber die elektrische leitungsfiihigkeit von cement und
beton. 3,500 w. Dr. 1896. (In Elektrotechnische zeitschrift,
553
v.17, p.180.)
Gives in tabular form results of many tests proving that for insulating purposes
asphalt concrete is superior to cement concrete.