Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . 7915 Bruntons Pocket Transit, weight 8 oz., with .each, $ 7916 Leather Sling Case for No. 7915 u 1 <t EK 254 KOLESCH <fc CO. NEW YORK. Verschoyle Pocket A. Thumb Loop. B. Clamp for lifting the needle from contact with jewel when instrument is not in use. C. Press Pin, for bringing1 the needle to rest quick- ly when taking an observation. D. Face of Prism Box,
Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . 7915 Bruntons Pocket Transit, weight 8 oz., with .each, $ 7916 Leather Sling Case for No. 7915 u 1 <t EK 254 KOLESCH <fc CO. NEW YORK. Verschoyle Pocket A. Thumb Loop. B. Clamp for lifting the needle from contact with jewel when instrument is not in use. C. Press Pin, for bringing1 the needle to rest quick- ly when taking an observation. D. Face of Prism Box, showing aperture leading to compass and sight. E. Back of Prism Box, showing extension of back sight Graduated Vertical Arc. This instrument was designed by a mining engineer of practical experience, andhas met a ready sale among mining engineers and others who want a light, portableinstrument for preliminary surveys. Its distinguishing feature is that, owing to itsnovel construction, only one observation is necessary to obtain both the magneticbearing and the vertical an^leof any distant point. It is also specially adapted foruse in difficult positions, such as are always liable to occur in filling in the rougherdetails in a mining survey. For rapid topographical work and working in constrainedpositions, the fact that half the labor is saved should be of interest to
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
