Merrill, George P. · John Wiley & Sons, Chapman & Hall, Ltd., · leaf 493
part and guides set upin them, on which moveframes carrying pulleysof a diameter somewhatless than that of theholes; over these pul-leys the cord saw isstretched ; motion isthen imparted to thepulleys by a simple sys-tem of transmission, andthe saws cut without in-terruption until the bot-tom of… … MACHINES AND IMPLEMENTS USED. 415 — ■ - . ■■ ■ ■ - in use in this country, nor has the author ever had oppor-tunity for examining it.* (7) THE SAND BLAST. As already noted, the sand blast has been utilized to someextent in the work of lettering head-stones, and for producingdelicate tracings on the…
Decoration and ornament, Architectural · Quarries and quarrying · Building stones
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![An illustration from Novo teatro di machine et edificii per uarie et sicure operationi : co[n] le loro figure tagliate in rame é la dichiaratione, e dimostratione di ciascuna : opera necesaria ad architetti, e a quelli, ch[e] di tale studio si dilettano (1607)](https://img.insideoutlibrary.com/img/200/ia-novoteatrodimach00zonc-55-33.webp)
