In the Khasia mountains I found, from the mean of twelve stations and twenty-three observations, the multiplier as derived from the mean of the temperature at the upper station and at Calcutta, to be 75.2 degrees, and as deduced from the formula to be 73.1 degrees.
"Himalayan Journals V2."
J. D. Hooker
There seems to be no reason to doubt that this report justifies the frequently used label "Schweigger's multiplier."
"The Earliest Electromagnetic Instruments"
Robert A. Chipman
The source of Poggendorf's vision of the multiplier principle was a little different from Schweigger's inspiration.
"The Earliest Electromagnetic Instruments"
Robert A. Chipman