Show BENSONS compendium Den bensons sons compendium by harrison T denson benson published by hall williams denver colorado is now ready for distribution the book is 4 1 inches neatly bound in flexible leather cover suitable for the coat pocket or library and contains 22 illustrations trat ions many of them showing some of the peculiar freaks of nature lix in forming ore deposits not shown in other books the book will be found reliable and trustworthy and contains much valuable information as well as being a handy reminder it explains what you want to know in the fewest words possible the following synopsis will indicate a small portion of what the book contains composition of minerals chemical symbols and atomic weights with their explanation rocks quartz and spars explained weight of ores and rocks effect of heat on various substances the difference in grains in avoirdupois and troy weights and miscellaneous weights fully explained the ductility of gold silver and copper wonders of science where our gold goes tables of minerals geological table from the to the quaternary igneous rocks metamorphic rocks Strati stratified fled sedimentary or aqueous rocks the latest method on amalgamation explained pla ined water measure of streams rule to find the flow per second in cubic feet or miners inches rule to find the cubic feet or tons of sand or numbers of gallons of water a given size round tank will hold rule to find the pounds pressure per square inch in a column of water of any given height the size and thickness of sheet iron pipe necessary to carry a given number of miners inches of water and stand any given pressure pumping with hydraulic ejector an essential improvement in laying track in a tunnel or drift to save time and money is fully explained timbering of mines roasting of ores etc etc bensons compendium will be furnished by the salt lake mining review sent to any address postpaid price 3 |