Show MM ISO t freehand mining sketching chin g frn mines and minerals i H if 14 IN IM 14 IM 1 lei lei alei lei in the march issue of mines and minerals under the title published an article was of taste and judge judgment ent in freehand mining sketching and the following suggestions are intended to illustrate some of the ide ideas as presented in the previous article in an example before us we have a very mountain diagonally in one direction and a series of parallel veins meet or cross this thia master vein in a contrary direction I 1 A cross cut mining tunnel is projected to run in at I 1 the base of the cliff cut the main vein drift on it and on the tributary veins this is the leading and most important feature ot of d i J f V y m i I 1 IA I 1 I 1 W r el 1 I ra fig 1 I preliminary skeleton sketch rugged portion of that most picturesque region of colorado the san juan the striking features are an exceedingly steep mountain about 2000 feet high cloven from oni nearly top to bottom by a mighty cliff the cliff is composed of a series of rugged layers of dark volcanic breccia these are traversed by a remarkable system of large the scene and upon these veins and the mining project the sketcher concentrates his attention we give drawings to show how such a subject may be treated by the sketcher and a photograph photo raph for comparison to show how it appears in nature the first drawing fig 1 is the preliminary skeleton and drainage sketch this 9 N V 2 1 41 J 51 1 N icv fig 2 CO complete sketch showing Miller millera 1 veins veins which by reason of their superior hardness stand out in relief from fr 0 m the face of the cliff the white quartz looking at a distance like veins of silver silve r in C contrast to the dark background of volcanic lava one large master vein traverses the for geological and mining purposes ditl il a little elaboration is often all that is needed and often preferable to the more elaborately elaborate finished sketch the second fig 2 is the elaborate completed picture the feature that first draws the sketchers chers attention is the bold sharp outline of the mountain against the sky this he draws accurately with a firm hand next he notes and draws theline the fine examples of drainage and sculpture the drainage system begins in a series of V like notches at the top of the mountain these narrow to a point as they descend and sometimes coalesce into one general canyon or gulch which tapers as it goes down and with a graceful curve runs off on the talus slope into the main canyon of the animas river there are three principal gulches or main drainage lines in the mountain mass with innumerable smaller tributary ones having drawn the main drainage lines sharply and crisply the sketcher next comes to the great cliff on the jace face of which he first delineates very distinctly the fissure veins as the subject of greatest importance the prominent ridges on the cliff face are formed by the outcrop of these veins he brings them out for his purpose much more forcibly and distinctly than the photograph does and he builds around these veins suggestions of the roughly bedded or rudely stati stratified fled rugged lavas there is a great deal of shadow in the photograph on this nearly vertical cliff of which he uses as much as will bring into prominence by contrast the white fissure veins he puts in some of the stronger shadows but omits the great amount of little shadows and lights and detail displayed on this precipice he also endeavors to bring out the of the cliff by vertical shading and its rugged character compared to the soft talus slopes at ai its base lastly he comes to the river valley where there is a fine exa example mple in the animas river of a somewhat rapid but winding stream viewed from a height the course of the stream doubtless was originally nearly straight as rapid torrents are wont to be but its course was deflected and made to wind out in an oab oxbow ow by the descent and encroachment of talus debris from the cliffs above the shading is concentrated around the steep cliff and is made rather dark in order t to bring out strongly angly the quartz fissure veins in the center of the picture |