## Instructions Given in the Drawing School Established by the Dublin Society: Course of mathematicks. System of the physical world. System of the moral world. Plan of the military art. Plan of the marcantile arts. Plan of naval art. Plan of mechanic arts. The elements of Euclid |

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Side xxxiii

... the Sun is a Globe of Fire resembling terrestrial Fire , since the globe of Gre , Effeas produced by this and the solar

... the Sun is a Globe of Fire resembling terrestrial Fire , since the globe of Gre , Effeas produced by this and the solar

**Rays**, are exaaly the same . Side xliv

... and mination , reflect 14 times more

... and mination , reflect 14 times more

**rays**to the Moon , than the Moon does to us , supposing both equally capable of refle & ing Light . Side xlvii

... as the Squares to the Sun of the Arcs of those Circles described in equal Times , divided by their to be in the

... as the Squares to the Sun of the Arcs of those Circles described in equal Times , divided by their to be in the

**Rays**, from whence he deduces ( cor . 6. ) ... Side lxii

... since the centrifugal Forces of Bodies revolving in Circles , are as their

... since the centrifugal Forces of Bodies revolving in Circles , are as their

**Rays**supposing the Time of Revolution to be equal : therefore supposing the ... Side lxiii

72 ) that the Attraction of homogeneous Spheres at their Surfaces is proportional to their

72 ) that the Attraction of homogeneous Spheres at their Surfaces is proportional to their

**Rays**, it follows that the Gravity ( V ) at the Surface of the ...### Hva folk mener - Skriv en omtale

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Instructions Given in the Drawing School Established by the Dublin Society ... Joseph Fenn Uten tilgangsbegrensning - 1769 |

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added alſo altitude angles arch Attraction baſe becauſe Bodies circle Comet common cone Conſequently contained cylinder demonſtrated deſcribed determined Diameter diſcovered Diſtance divided double draw drawn Earth ECAUSE equal Equator Eſq Experiments fall fame fides figure firſt follows Force given Gravity greater half Height Hypotheſis Jupiter Laws leſs Likewiſe magnitude manner mean meet Moon Motion multiple Nature Newton Nodes Number Obſervations oppoſite Orbit paſſes Place plane plle Prep Preparation priſm produced proportional PROPOSITION proved pyramid Quantity ratio Rays remaining revolve Rgle round ſame Saturn ſecond ſhould ſides ſimilar ſince ſphere ſtraight line ſuppoſed taken THEOREM theſe Theſis third thoſe thro Tides tion triangle Waters Wherefore whole whoſe

### Populære avsnitt

Side 4 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.

Side 164 - When of the equimultiples of four magnitudes (taken as in the fifth definition), the multiple of the first is greater than that of the second, but the multiple of the third is not greater than the multiple of the fourth; then the first is said to have to the second a greater ratio than the third magnitude has to the fourth : and, on the contrary, the third is said to have to the fourth a less ratio than the first has to the second. VIII. 'Analogy, or proportion, is the similitude of ratios.

Side 165 - When four magnitudes are continual proportionals, the first is said to have to the fourth the triplicate ratio of that which it has to the second, and so on, quadruplicate, &c., increasing the denomination still by unity, in any number of proportionals.

Side 8 - Let it be granted that a straight line may be drawn from any one point to any other point.

Side xxviii - This depends upon three suppositions: — first, that all celestial bodies whatsoever have an attraction or gravitating power towards their own centres, whereby they attract not only their own parts and keep them from flying from them, as we may observe the earth to do, but that they do also attract all the other celestial bodies that are within the sphere of their activity...

Side 164 - VII. When of the equimultiples of four magnitudes (taken as in the fifth definition), the multiple of the first is greater than that of the second, but the multiple of the third is not greater than the multiple of the fourth ; then the first is said to have to the second a greater ratio than the third magnitude has to the fourth : and, on the contrary, the third is...

Side 29 - Therefore if two straight lines, &c. QED COR. 1. From this it is manifest, that, if two straight lines cut one another, the angles they make at the point where they cut, are together equal to four right angles.

Side 29 - Cor. 2. And consequently that all the angles made by any number of lines meeting in one point, are together equal to four right angles.

Side xxviii - Saturn also, by their attractive powers, have a considerable influence upon its motion, as in the same manner the corresponding attractive power of the earth hath a considerable influence upon every one of their motions also.

Side xxviii - The third supposition is that these attractive powers are so much the more powerful in operating, by how much the nearer the body wrought upon is to their own centers. Now what these several degrees are I have not yet experimentally verified...