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Specifical Gravity of the Silver, as the Maſs of the Silver hath to

the Maſs of the Gold; that is, as the difference betwixt the

Weight in Water and Weight in Air of the Silver, hath to the

difference betwixt the Weight in Water and Weight in Air of

the Gold.

the Maſs of the Gold; that is, as the difference betwixt the

Weight in Water and Weight in Air of the Silver, hath to the

difference betwixt the Weight in Water and Weight in Air of

the Gold.

With this ſame Ballance one may with facility meaſure the

Maſs or Magnitude of any Body, in any manner whatſoever Irre-

gular in manner following, namely:

Maſs or Magnitude of any Body, in any manner whatſoever Irre-

gular in manner following, namely:

We will have at hand a Solid Body of a ſubſtance more grave

in Specie than the Water; as for inſtance of Lead; or if it were

of Wood, or other matter more light in Specie than the Water,

it may be made heavier by faſtning unto it Lead, or ſome other

thing that makes it ſink in the Water, and let us take ſome

known Meaſure, and with it meaſure the Irregular Solid; as for

inſtance, the Roman Palm, the Geometrical Foot, or any other

known meaſure, or part of the ſame, as the half Foot, the quar-

ter of a Foot, or any ſuch like part known; then let it be weighed

in the Air, and ſuppoſe that it weigh 10 pounds; let the ſame

Meaſure be weighed in the Air, and ſuppoſe that it weigh 8

pounds: and ſubſtract 8 pounds, the Weight in the Water, from

10 pounds, the Weight in the Air, and there remaineth 2 pounds

for the Weight of a Body of Water equal in Magnitude to the

Meaſure known. Now, if we would meaſure a Statue of Mar-

ble, let it be weighed firſt in the Air, and then in the Water, and

ſubſtract the Weight in the Water from the Weight in the Air, and

the remainder ſhall be the weight of ſo much Water as equalleth

the Statue in Maſs; which being divided by the difference betwixt

the Weight in Water and the Weight in Air of the Meaſure known,

the Quotient will give how many times the Statue containeth the

ſame given Meaſure. As for example; if the Statue in Air weigh

100 pounds, and in the Water 80 pounds, 80 pounds being ſub-

ſtracted from 100 there reſteth 20 pounds for the Weight of ſo

much Water in Maſs as equalleth the Statue. But becauſe the

difference betwixt the Weight in Water, and the Weight in Air

equal in Magnitude to the Meaſure known, was ſuppoſed to be

2 pounds; divide 18 pounds by two pounds, and the Quotient

is 9, for the number of times that the propoſed Statue containeth

the given Meaſure. The ſame Method may be obſerved, if it

were required, to meaſure a Statue, or other Maſs of any kind of

Metal: only it muſt be advertiſed, that all the holes muſt be

ſtopt, that the Water may not enter into the Body of the Statue:

but he that deſireth only the Solid content of the Metal of the

ſaid Statue muſt open the holes, and with Tunnels fill the whole

cavity of the Statue with Water. And if the Statue were of a

Subſtance lighter in Specie than the Water; as, for example, of

in Specie than the Water; as for inſtance of Lead; or if it were

of Wood, or other matter more light in Specie than the Water,

it may be made heavier by faſtning unto it Lead, or ſome other

thing that makes it ſink in the Water, and let us take ſome

known Meaſure, and with it meaſure the Irregular Solid; as for

inſtance, the Roman Palm, the Geometrical Foot, or any other

known meaſure, or part of the ſame, as the half Foot, the quar-

ter of a Foot, or any ſuch like part known; then let it be weighed

in the Air, and ſuppoſe that it weigh 10 pounds; let the ſame

Meaſure be weighed in the Air, and ſuppoſe that it weigh 8

pounds: and ſubſtract 8 pounds, the Weight in the Water, from

10 pounds, the Weight in the Air, and there remaineth 2 pounds

for the Weight of a Body of Water equal in Magnitude to the

Meaſure known. Now, if we would meaſure a Statue of Mar-

ble, let it be weighed firſt in the Air, and then in the Water, and

ſubſtract the Weight in the Water from the Weight in the Air, and

the remainder ſhall be the weight of ſo much Water as equalleth

the Statue in Maſs; which being divided by the difference betwixt

the Weight in Water and the Weight in Air of the Meaſure known,

the Quotient will give how many times the Statue containeth the

ſame given Meaſure. As for example; if the Statue in Air weigh

100 pounds, and in the Water 80 pounds, 80 pounds being ſub-

ſtracted from 100 there reſteth 20 pounds for the Weight of ſo

much Water in Maſs as equalleth the Statue. But becauſe the

difference betwixt the Weight in Water, and the Weight in Air

equal in Magnitude to the Meaſure known, was ſuppoſed to be

2 pounds; divide 18 pounds by two pounds, and the Quotient

is 9, for the number of times that the propoſed Statue containeth

the given Meaſure. The ſame Method may be obſerved, if it

were required, to meaſure a Statue, or other Maſs of any kind of

Metal: only it muſt be advertiſed, that all the holes muſt be

ſtopt, that the Water may not enter into the Body of the Statue:

but he that deſireth only the Solid content of the Metal of the

ſaid Statue muſt open the holes, and with Tunnels fill the whole

cavity of the Statue with Water. And if the Statue were of a

Subſtance lighter in Specie than the Water; as, for example, of