These remarks are prefaced in the 'Encyclopaedia' article by
the following statement: 'No telegraphic testing ought in future
to be accepted in any department of telegraphic business which has
not this definite character; although it is only within the last
year that convenient instruments for working, in absolute measure,
have been introduced at all, and the whole system of absolute
measure is still almost unknown to practical electricians.'
A particular result of great importance in respect to testing is
referred to as follows in the 'Encyclopaedia' article: 'The
importance of having results thus stated in absolute measure is
illustrated by the circumstance, that the writer has been able at
once to compare them, in the manner stated in a preceding
paragraph, with his own previous deductions from the testings of
the Atlantic cable during its manufacture in 1857, and with Weber's
measurements of the specific resistance of copper.' It has now
become universally adapted - first of all in England; twenty-two
years later by Germany, the country of its birth; and by France and
Italy, and all the other countries of Europe and America -
practically the whole scientific world - at the Electrical Congress
in Paris in the years 1882 and 1884.
Pages:
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305