III.—GRAPHIC REDUCTION OF TRIANGULATION.
192 The need of a graphic method
193 Old and new methods of graphic reduction
194 The practice of graphic reduction
195 Delineation of the traces
196 Accuracy in the present survey
197 Applicability of graphic reduction
XIV.
A. Alabaster. B. Basali D. Diorite. G. Granite. L. Limestone.
XV.
XVI.
TRACES OF THE ACTUAL OBSERVATIONS
ON THE TRIANGULATION STATIONS AROUND THE GREAT PYRAMID.
Traces Actual Size, i.e. shewing the actual lineal differences of the observations From the mean stations found by graphic adjustment.
Distances of stations apart, Scale 1 to 1800.
Angular differences therefore 1/2" here to 1” in field.
Circles around stations = probable error of places of stations, by traces as here shewn.
Full Lines = Direct Observations.
Dotted Lines = Reflex Observations.
TRACES OF THE ACTUAL OBSERVATIONS
ON THE TRIANGULATION STATIONS AROUND THE GREAT PYRAMID.
Traces Actual Size, i.e. shewing the actual lineal differences of the observations From the mean stations found by graphic adjustment.
Distances of stations apart, Scale 1 to 1800.
Angular differences therefore ±" here to 1” in field.
Circles around station = probable error of places of stations, by traces as here shewn.
Full Lines = Direct Observations.
Dolled Lines = Reflex Observations.
ERRATA.
| Page 30 | line 7 | for consider | read consider. |
| Page 38 | line 1 | for case | read core. |
| Page 41 | line 2 | for othe thers | read the others. |
| Page 41 | line 43 | for ±· | read +·1. |
| Page 42 | line 33 | for 0·9 | read ·09. |
| Page 43 | line 13 | for measurement | read re-measurement |
| Page 50 | line 28 | for ·24′ | read 24′ |
| Page 65 | line 34 | for ±3· | read ±·3; |
| Page 157 | line 12 | for dozen | read dozens. |
| Page 212 | line 1 | for tweve | read twelve. |
| Page 218 | line 10 | for Ibr | read Ibn. |
Plate xiv., fig. 7, the lithographer has drawn the lines wavy, whereas they really form a true spiral, as described p. 174, and in Anthropological Journal.