(

may be folved by (almost) any of those Canons
or Tables, was the occasion of the omission of
such Tables here at present. But chiefly, be-
cause there is intended (in some short time) to
be Printed,) ACANON of Artificial SINES and
TANGENTS, both Sexagenary and Centeci-
mal; differing from any yet Extant; it supply-
ing both ways of Numeration at one view, and
yet in the same Room: And to this CANON shall
be Added Ten CHILIADS OF LOGARITHMSCOM-
modioufly Contracted; and the Use thereof in
Logarithmical Arithmetick.

Thus having given the Reader a General Ac-
count in this Preface, I refer him to a more Par-
ticular in the following Contents, and so leave
him to the Practice of them : In which I wish him
good fuceess; and till he hears farther from
me, bid him Farewell...

WILL. LEYBOURN.

ERRA-

Figures in the Margins Omitted, or Misplaced.

Page 7. Against Probl.I. put Fig.VIII. and against Prob.II. put Fig. IX. in the Margim..

Page 9. Against Probl. V. put Fig. XIII. in the Margin.

Page 20. For Fig. XXXIV. put Fig. XXXVII. in the Margin.

Page 50. For Fig. VI. put Fig. XII. in the Margin.

Page 89, 90. 91. Fig. XXXI, in the Margin, must be Fig. XXXII.

Page 274. Fig. LIII. in the Margin, is omitted

Page 285, and 286. for Fig. LIX. read Fig. LVIII. in the Margin.

Page 53. The three last Lines are thus to be read :

One Right Angle, and Two Acute.

Two Obtuse, and One Right.

One Obtuse, and Two Acute..

CON-

3. The Affections of Right-lined, or Plain Triangles 38 to 43

4. The Mensuration (or Solution) of Plain Triangles

5. SPHERICAL TRIANGLES,

43 to 50

Definitions,

Theorems,

50 to 56

Affections of Great Circles of the Sphere,

the Demonstrating of Spherical Triangles

in order to 56 to 60

6. The Solution of Right-Angled Spherical Triangles

60 to 68

7. Oblique-Angled Spherical Triangles, and Prenotions con-

cerning them

68 to 70

8. The Solution of them

70 to 83

9. Oblique-Angled Spherical Triangles, Resolved without regard

had to a Perpendicular

10. Trigonometical Problems Extraordinary

of the Sphere in Plano

96 to 105

106 to 114

11. Spherical Triangles Geometrically performed, by Projecting

12. Spherical Trigonometry, Instrumentally Performed feveral

ways: As, by the

Steriographical,

2

Orthographical

Planispheres

114 to 138

Part III. ANCILLA: Vel, Trigo-
nometria Practica.

ALTIMETRIA, Or the Taking

of Heights, (as of

Towers, Trees, Steeples, &c. Whether Accessible or Inac-

ceffible; several Ways

From Page 141 to Page 147

2. LONGIMETRIA; Or the Measuring of Diftances: As of

Remarkable Places upon the Earth, Ships upon the Sea, &c. Ei-

ther Acceffible, or Inacceffible

147 to 152

3. PLANOMETRIA; Or the Measuring of Plains: As
of Board, Glass, Pavements, Hangings, Wainscot, &c.

4. Geodæcia; Or Measuring of Land-

152.to 155

155 to 158

5. STERIOMETRIA; Or the Mensuration of Solids :

As Timber, Stone, &c. And of Regulars: As Cubes, Globes,

Prifms, Parallelipipedons, Pyramids, Cones, &c. whether

Whole or Diffected

158 to 160

SECT. II. OF COSMOGRAPH Υ.

And therein of

4

1. The Material Sphere, or Globe, Celeftial and Terrestrial: And of

fuch Circles, Lines and Points, as are described thereon,

Appendent unto it

or

161 to 167

2. COS

:

2. COSMOG APHIC AL ELEMENTS, both

Geographical and Astronomical

167 to 175

SECT. III. Of GEOGRAPHY.

And therein of

The Use of the Terrestrial Globe, and thereupon to find the Situati-
on of Places both in Longitude and Latitude: And to find their

Distances: And also by Trigonometrical Calculation

1

176 to 185

SECT. IV. Of ASTRONOΜΥ.

And therein of

1. ASTRONOMICAL TABLES

185 to 197

2. Aftronomical Problems, relating to the Sun and Fixed Stars:

To Work them upon the Globes; And by Trigonometrical Calcu-

lation alfo

3. Aftronomical Problems, relating to Aftrology

197 to 256

257 to 266

SECT. V. OF SCIOGGRAPHIA, or DIALLING..

And therein of

1. DIALLING in General; with the Situation of all Plains

on which Dials may be made : And to find out any fuch Situation.

267 to 272

2. The Making of all forts of Dials, by finding out the places of Sub-

stile, Stile and Hour-Distances, by the Globe: And also, to find

the fame Requifites, and Hour-Distances, by Trigonometrical

Calculation, after a new Method

272 to 296

3. The Inscription of the Greater and Leffer Circles of the Sphere

npon all forts of Dial Plains

And fuch are

Parallels of Suns Course throughout the Zodiack,

Zodiack

Parall. of the Days length, Suns Rifing, Setting, &c.

Azimuth or Vertical Circles,

Almicanters, or Circles of the Suns Altitude.

Jewish, Italian, and Babylonish Hours

296 to 303

SECT..