' Loufe of the Carp . ~ ” 
a Scale of Inches feen by the naked Eye, ac¬ 
cording to Dr. Hooke s Method* *) and found 
it coincide exactly with 4 Inches: and confe- 
quently that the Glais magnified 80 Times. 
Then taking my divided Inch from under 
the Magnifier, in order to make ufe of it in 
the fame Manner as I before had done of. 
the Scale of Inches, I caft the magnified 
Image of one of thefe Animalcules on my 
Scale of Twentieths of an Inch feen only by 
the naked Eye, and found Its Length to 
cover 14 and its Breadth 8 of thofe 20th 
Parts of an Inch.—But the Meafures of 
Piths and Toths being only the apparent 
Dimenfions, they mu it be divided by 80, 
the magnifying Power of the Glafs, to give 
the real Size of the Animalcule, which will 
then be found to be in Length, and 
tToo in Breadth: which Fractions reduced to 
their fmalleft Denominators will be wo, 
(nearly -rf T th) and tI-ct : or taken decimally, 
TpVohoth, and T-oV-oth Parts of an Inch. 
----- --:-- 
CHAP. XXIV, 
It be Louse of the Carp. 
T H E Animal fhewn at N° xiv. Plate 
XIV. was found, with feveral others c 
of the fame Kind, flicking to a large Carp, : 
* See this Method explained in The Microfcope made eafy. 
