Topographical Drawing and Sketching, Including Applications of Photography, Τόμοι 1-2J. Wiley & Sons, 1888 - 26 σελίδες |
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adjusted alidade aneroid barometer angle applied azimuth balloon base breadth brush camera captive balloon centre clinometer colors compass constructed contours convenient copy corresponding curves described determined direction division dots drawn edge English Units equidistant points exposure extremities fastened feet field-work figure fixed focal distance given glass hachures height hill-shading horizontal inches inclination India ink instrument intersection intervals latter length marked means measured meridian method metres middle point miles objective oblique observed obtained optic axis outlines pantograph paper parallel pencil perpendicular photographic placed plane plate-holder plotted polyconic projection position projection protractor Prussian blue purpose radius rapid rectilinear rectangle rectangular reduction reference represented right line scale of equal scale of shade sensitive plate sheet side sketch slopes stations straight-edge subdivided summit surface surveying tangent tint tion tract traversed triangle usually vernier vertical vertical angle working-scale ΙΟ
Δημοφιλή αποσπάσματα
Σελίδα 82 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.
Σελίδα 51 - To develop the surfaces, divide the circumference of the cylinder into any number of equal parts, and through the points of division draw lines parallel to the center line of the cy Under.
Σελίδα 114 - I did not dismount, and galloped from station to station. C. " Having finished at A, I went along the road to Huerta (C), a farm of only two or three buildings, which was the only point to be seen in that direction from A ; judging, then, this distance galloped over, the line from the church of Sta. Martha to C was assumed as the base. " It was desirable that this front of the sketch towards Huerta should be done first, as the enemy's skirmishers were exchanging shots with ours between C and Pelobravo...
Σελίδα 114 - The liney, intersecting AE, showed nearly where the steep fall of ground at J would come. The line L pointed out where the road to Calvarosa Abajo crossed the rivulet, and to that point (N) I went. N. " Here the angle between Sta. Martha and C was laid off, which fixed N, and then intersecting the lines /and K (taken from C), those two farms were fixed.
Σελίδα 115 - W being intersected, gave the boundary of the ground (I-): the farm in front, observed from T, could no longer be seen. " Passing, then, down by the right and along the hollow between the two great hills, I went to the Hermita, and this point having been before fixed, from thence the direction of the further fall of the great hill (S) and two slopes of the hill on the further side of the Calvarosa valley were secured, as well as the direction of the watercourse above and below. I then passed down...
Σελίδα 52 - ... increased intensity of shade is produced by keeping the same space between the hachures as for 40°, while increasing the space in which a certain number of hachures are placed by 25 per cent for a 45° slope, 50 per cent for a 55° slope, 75 per cent for a 65° slope, and 100 per cent for a 75° slope. For slopes less than 5° the breadth of hachures is the same as for 5°, but the 5° space is increased. 25 per cent for 4°, 50 per cent for 3°, 75 per cent for 2°, and 100 per cent for 1°....
Σελίδα 19 - If attached, it is desirable to have two of this form, one on the back and the other on the front of the camera : one is shown in position at /, Fig.
Σελίδα 115 - A farm also, in a hollow of some wood to the front, was also noted. X. " I then went to the smaller hill, intending to go to the top, but the rocks were so rugged I could not ride up ; so, standing on a line between it and T, at X, that station was fixed by observing the direction to E and to the Hermita. " The line to Calvarosa from R was next intersected, which fixed that place. The direction to the houses (Z) was also laid down, and this place turned out to be the village of Arapiles ; and the...
Σελίδα 114 - Marta, which fixed P. It was also noticed that the line to the farm, I, passed to the right of the farm K, which observation helped to correct the sketch ; also it could be seen that the line to H passed over K. The direction J was next taken, showing the fall of ground and the direction of the road D. There were no other points that could be fixed between D and the skirt of the wood, E. E.
Σελίδα 115 - ... and two slopes of the hill on the further side of the Calvarosa valley were secured, as well as the direction of the watercourse above and below. I then passed down the valley, and wound up the sketch at O. " Going back from thence to C, I proceeded along the main road to D and E, putting in, on judgment, the village of Carvajosa, as well as the point F, where was a house, and where the great Salamanca road passed. " I returned to Cabrerizos, finding the Duke where I had left him, and handed...