## A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles ... |

### Dentro del libro

Resultados 1-5 de 5

Página 48

Wherever there are several quantities connected with the sign :: the conclusion is

always

Triangles ABC , DEF , standing upon equal bases AB and DE , are to each other

as ...

Wherever there are several quantities connected with the sign :: the conclusion is

always

**drawn**from the first two and last two proportionals . THEOREM XIX .Triangles ABC , DEF , standing upon equal bases AB and DE , are to each other

as ...

Página 56

For , if AC , AD , BC , BD , be

equilateral , and consequently the angle ACE = BČE : therefore the triangle AČE ,

BCE , having AC = BC , CE common , and the angle ACE = BCE : ( by theo . 6. ) ...

For , if AC , AD , BC , BD , be

**drawn**, the triangles ACD , BCD , will be mutuallyequilateral , and consequently the angle ACE = BČE : therefore the triangle AČE ,

BCE , having AC = BC , CE common , and the angle ACE = BCE : ( by theo . 6. ) ...

Página 171

Let ABCD represent the sheet of paper on the plane table , upon which the plot E

, F , G , H , I , K , L , M , is to be

not room on your paper for the line GH ; however ,

Let ABCD represent the sheet of paper on the plane table , upon which the plot E

, F , G , H , I , K , L , M , is to be

**drawn**... then proceeding to H , you find there isnot room on your paper for the line GH ; however ,

**draw**as much of the line GH ... Página 209

A line

next the said points fast , and

then hold this last side fast , and

...

A line

**drawn**from D to e , will take in as much as it leaves out . ... hold that sidenext the said points fast , and

**draw**back the other to any convenient distance ;then hold this last side fast , and

**draw**back the former edge to B , and by it mark b...

Página 269

the map in a neat compartment either

graving , with the gentleman's arms . Prick off one of your parallels with the map ,

and on it make a mariner's compass , and

the map in a neat compartment either

**drawn**, or done from a good copper - plategraving , with the gentleman's arms . Prick off one of your parallels with the map ,

and on it make a mariner's compass , and

**draw**a flower - de - luce to the north ...### Comentarios de la gente - Escribir un comentario

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### Términos y frases comunes

acres angle Answer base bearing called centre chains chord circle Co-sec Co-sine Co-tang column contained decimal difference direct distance divided division draw drawn east edge equal EXAMPLE feet field field-book figures four four-pole fourth give given greater ground half height Hence inches laid land Lat Dep length less logarithm manner measure method multiplied needle object observe opposite parallel perches perpendicular plain plane Plate pole prob PROBLEM proportion quantity quotient radius reduce remainder right angles right line root scale Secant sect side sights sine square station suppose survey taken Tang tangent theo THEOREM third triangle triangle ABC true turn variation whence whole

### Pasajes populares

Página 25 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.

Página 207 - ... that triangles on the same base and between the same parallels are equal...

Página 40 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.

Página 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.

Página 103 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.

Página 31 - Figures which consist of more than four sides are called polygons ; if the sides are all equal to each other, they are called regular polygons. They sometimes are named from the number of. their sides, as a five-sided figure is called a pentagon, one of six sides a hexagon, &"c.

Página 31 - ... they are called regular polygons. They sometimes are named from the number of their sides, as a five-sided figure is called a pentagon, one of. six sides a hexagon, &c. but if their sides are not equal to each other, then they are called irregular polygons, as an irregular pentagon, hexagon, &c.

Página 45 - The hypothenuse of a right-angled triangle may be found by having the other two sides ; thus, the square root of the sum of the squares of the base and perpendicular, will be the hypothenuse. Cor. 2. Having the hypothenuse and one side given to find the other; the square root of the difference of the squares of the hypothenuse and given side will be the required side.

Página 265 - As the length of the whole line, Is to 57.3 Degrees,* So is the said distance, To the difference of Variation required. EXAMPLE. Suppose it be required to run a line which some years ago bore N. 45°.

Página 32 - Things that are equal to one and the same thing are equal to one another." " If equals be added to equals, the wholes are equal." " If equals be taken from equals, the remainders are equal.