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Doc. 200.] 583
HIORTER’S OBJECTIONS.
E.
MISTAKES IN THE COMPUTATION PRESENTED TO THE ACADEMY OF SCIENCES
BY THE WELL -BORN ASSESSOR SWEDENBORG, IN WHICH HE COMPUTED THE
DECLINATION OF THE MAGNETIC NEEDLE FOR THE YEAR 1740 AT UPSAL, COM .
PARING THE SAME WITH THE PRINCIPLES, RULES, AND EXAMPLES CONTAINED
IN VOL. I. OF HIS PHILOSOPHICAL WORKS.
Without translating the whole of Magister Hiorter’s lengthy
paper on this subject, we shall simply state the points to which
he took objection.
First, he objected to Swedenborg’s taking the latitude of
Upsal to be 59° 50’, when it is 59° 52’ ; and to his assum
ing the longitude eastward from London to be only 15°," when
it is really 17 .
Secondly, he objected to Swedenborg’s taking, in the 7th
operation, the whole latitude 59° 50’, instead of its complement
with respect to 90 degrees, viz. 30° 10’, and in employing this
number five different times ; when yet he stated clearly in
his Principia, P, 319, that the complement is to be used
instead.
Thirdly, in the 8th operation the sum of multiplying 66°
45’ by 6 " is 6’ 424" instead of 6’ 36 " .
Fourthly, in the 11th operation 38° 22’ is written and used
instead of 38’ 29" .
Fifthly, in the 12th operation 66° 25’ is put down instead
of 66° 45’.
Sixthly, in the 16th operation the complement of the co
tangent is taken as 9.79435, instead of 9.76435.
Seventhly, in the 14th operation 6° 11’ is added to 108°
20’ instead of being subtracted therefrom ; as required by the
rule on p. 321.
Eighthly, in the 20th operation 2° 28’ is put down instead
of 2° 32.1’.
Ninthly, in the 21st operation 60° is proportioned with 90°,
instead of with 89° 29’.
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