Show DYNAMITE interesting facts about the great explosive DIFFERENT COMPOUNDS experiments with tho dynamite qun down trees with it i maisy people who read about dynamite eipl and the occa damage done to property 1 by careless or criminal explosive have lilt ledea of the real commercial value of the stuff isaid a manufacturer recently to the public the word dynamite conjures up pictures of powdered rocks and to those with explosives it savors only of that which is safe end useful people hear at once when disaster happens but of course there is no reason they should keep track of the thousands of times the stuff is used without disaster before dynamite was invented gunpowder and rifle powder we reused id blasting fuses were made that would burn away gradually until the charge was reached when blasts failed to go off nii ner or man often went to the hold in which the powder was placed ta see what was the matter blown off sometimes the fuse burned so rapidly were struck down by showers of flying rock before they could reach a place of safety now that has all been changed dynamite is not fired batby electricity A little coppery cap filled with fulminate is placed in the charge from this cap the wires are run to a place offra ety after the workmen have all retired the foreman conjecta con necta the wires wiell a little levera or presses a button and the blast it is no exaggeration to say that not one tenth as ih using dynamite acwith powder in fact life or damage to property is now invariably dud to criminal carelessness i the ward a a hall dozen ini which the explosive the nitro is 1 ally mixed with some other materi furnishes tittle gas when thel explosion takes place but there is one high explosive made of a mix ture 8 per cent of gun botteri and ceat glycerine this iravea no ash A more powerful explosive than this combination is nat made and yet it bitsi singularly safe i in the course this experiments with the dynamite throwing gun at fort Zali uski has had some curious experiences the gelatine or gun cotton mixture 1 9 imported iq little brown rolls that can be twisted and beef around like rubber or torn apart like tough jelly Zal inaki has placed the rolls on iron places and dropped big stones on them from a height of twenty feet without exploding them held in the flame of a lamp the roll took fire and burned brilliantly li but only as hot graae might but the most singular tea ture efthia powerful explosive was the fact that there could be a local explosion iu a masa of it selling whole lot having fired a diflo ball anto R bag of it there waa taj very distinct flash and explosion enter edil on another occasion break a big iron plate apart laid cartridges dynamite of aad gelatine along the lino of fracture and exploded atheni with a battery the dynamite as usual and go did all but two of the delatine Ee latine car tridiea these two were each about one half consumed the remaining portions ened and charred alter the it was concluded the gelatine must bo exploded by fulminate iq get explode atall and 0 o make sure of its full effect be first confined afien the was called to the fact that naval officers had tested dynamite by hanging pounds of it against a big armor plate for a ship and then with of a mere dent in the ho proceeded to a similar nie nt an eln was S three inch iron plate and A slight depression in tho plate toy tho length of the cartridge was the eoles result theta an anglo iron a fw pounds pou the ina circle of which was consid drably larger ence t tie cartridge was hung another cartridge placed on another pla t 0 utina platte u wt placed light as this tamping wass it dynamite amite to blow a big anle through hoth platen a in another experiment twenty pound of dyna mUe placed in a thi oiron cylinder which stood on end on a pile of builer platea was camped tamped with a few inches of to a sand laid loosely ontoh the ex drove a hole through six inches iron and blew the bigall the cylinder through three quarters afan inch of iron that wag standing near 1 I do not intend to banga cartridge of dynamite on the aide of an ship aard the lieutenant 1 I intend to throw it against the ship with great velocity if the cartridge weighs pounds and 13 forced against the side of the ship with a velocity sufficient to carry it jar beyond the ship there will be a camping of ascertain number of foot pounds duo lo 10 the inertia of the cartridge if the naval officers will make further experiments they will aUer their opinion experiments were made in apo plying the exploder to different ends of the long cylinder of dynamite that forms the shell of the dynamite gun when in n public avena year ago a shell holding fifteen pound dys waa throw nto the long laland shore of the narrows and exploded at the forward end it made no impression sion on the sand banki which it struck ing the grass for a rod bior two around aher cartridges how ever threw up large quantities of eartle and broke open the rock one that fell into band exploded beneath n the surface ture outa great cra terin the not torn after that the shells arranged to explode from oberear end of the charge the destructive effect in a n open air explosion was i thereby increased from 20 to 25 r i ii think this is due said to the fact that it takes lime for th e dynamite to explode when dynamite around an ex in the forward end of n long shell goes off the gas for ward acts as a cushion to hold back of the fo raed fram there mat ader of the charge if the exploder is placed at the rear of the cylinder bl dynamite chegas from particles of dynamite immediately around the exploder serves only to drive the remainder of the charge forward with so much more force to the greater destruction st of the object in aronof iron of it sheathe charge af pf dynamite is explode dunder water a faund bedito fire the charge fro mihe forward sau of thea torpedo be bei i cause water is the b es t ibl tamping therease Ther eare varying grades of du amite proper eaid aadu fac the quantity of nitroglycerine in the mixture dei de i ter mines theara se thusa a 60 percent mixture is now used 1 in blasting out he iio ithe new croton aqueduct andai 40 per cent mixture in the benches or in breaking up the blocks that are n bythe aln lighterd ligh teri mixtures are used because only the natural seams and bebop tho solid rock must bei kept NO 1 dynamite is 5 cant a pound the light 1 est grade only 15 ants the acla i i 8 quoted in england ai 2 shillings freight and a 10 per cent duty hava been added with a reasonable profit the here would not be les cents a pound jt cani be made here bu it iston powerful for commercial purposes for wac it superior t everything il the passengers gera an a liverpool steamer ato know that a consignment of this explosive was in the bold under the loaia said ft lia teher it ie never carried in st camera saida the manufacturer ri alling vessels monopolize the business ve quantities of dy especially to mexico iti lacked in wooden cases thai wd fifty pounds each they are lined with cement and hato a cushion lining of material that will absorb and prevent shocks be aidea ju that i u with ind is in ure dand carried rale charged for the barrel flaurie fla urbe ido it american explosives are inmost parts of the world dynamic Dy is used fur odd purposes buch ab tufting trec sip stead bt an axa or saw if a pound of dynamite is properly 1 der a big treo or stump for itha matter and is x plodded the th is lifted out of the ground it s a cheaper and better way of adding the woric than the old way but the the expletive asin quarry work ant to those blanchey bran chey of the strade w devote vw 1 7 r f yai 1 rr 0 |