Show J m r i iJ pj- pj t f NOTES ON SCIENCE ACHIEVEMENTS AND DISCOVERIES DISCOVER DISCOVER- IES OF MERIT Marine Engine Governor Obviates Damage to Blades of Propeller Propeller Propeller-Im- Im Improvement provement In Harness Harness' Used on Draft Teams Teams New New Magazine Rifle Vast Extent of Salt Deposits The salt mines of Poland and Hungary Hungary Hun Hun- gary continue to turn turn out vast quantities quantities ties of salt Near Cracow In Poland Is a mine that has been continuously worked for salt since the year 1251 and such is the vastness of the deposit deposit deposit de de- dei i posit tha that'll it is estimated there is yet enough salt salt salt-in in the mine to supply the world for centuries to come The mine presents to visitors one one of t the e. e most wonderful and bea beautiful sights In all nature Vast caverns caverns of salt are met met- with and the owners at certain certain certain tain places have hav had carved out of the the salt houses chapels monuments and other ornamental forms and when m Illuminated these objects present presenta a scene cene of vast splendor This mine Isa is isa isa a great object of curi curiosity and the owners l keep a number of guides to take visitors through the workings there being miles and miles of tunnels tun tun- eels nels with great caves and galleries here here and and there Attachment for Team Harness There are are but very few of the f articles articles used by our great p ers which still retain their old form with little change or improvement but among this number may be counted counted counted count count- ed the harness which is used on horses for hauling purposes Practically PractiCally PractiCally Cally the same pattern o of harness has been een used for many years years past while while- while other things introduced d with It have W been teen altered beyond recognition or displaced altogether ther That there was Zt 3 f 1 I tt-J tt 1 r 1 s L ri vw t 00 t 0 7 t t Affords Free Free FreeM M Movement of the Ani n trials mats ah Body stina still a chance for Improvement Is 5 shown by the picture here presented V p j Illustrating a change In in the V tion of a heavy team team harness which will at le least st add to th the comfort of the animal The principal advantage of this arrangement is that It does away with the strap passing around r u d the t- t animals animal's ls l's body which of or necessity interfered interfered interfered in in- somewhat with the muscular exertion and added to the e discomfort in hot weather In this improvement nt nta a a short curved strap strap is l laid ld ov over over r the back being held In pI place ce by a strap passing from the breeching t to the collar collar col col- lar 1 and only coming int Into play when the animals are backing The traces are entirely free of f the harness from collar to whit whiffletree and and- afford a chance for a straight pull without interference interference in in- in interference from any other portion of i the harness Frederick L L. Ainsworth I of Turner Kan is the inventor Varying Temperatures Some years ago Weir worked out a n arule a. a rule for calculating the absolute tem temperature temperature of a heated bOd body from the wave length of Its most energetic radiations From this rule Yule which gives probable results the suns sun's temperature temperature temperature tem tem- is found found to range rang from degrees to degrees Fahrenheit that of from frolD degrees to degrees Vega degrees to degrees Arcturus 2450 degre degrees s. s to io 2700 degrees Aldebaran degrees degrees de de- grees to 2850 degrees and the electric electric electric elec elec- light degrees to de de de- grees White arid alid blue stars are are much hotter than red and yellow New Magazine Rifle The machine gun with its auto auto- automatic I matic firing mechanism marks a r r tong long step over the tho muskets and canDon cannon cannon can can- non Don used at the time of our civil war and the repeating rifle used by sportsmen sportsmen sportsmen sports sports- men h has s replaced the old muzzle- muzzle loading single barrel gun which our grandfathers grandrath rs used Still another improvement improvement improvement im im- provement has been wrought out by bythe bythe bythe the Inventor which we show in the accompanying illustration combining features of of the revolver with tho the magazine rifle In this arrangement the stock Is utilized for the storage of the loaded shells while at the end of this chamber Is a rotary carrier which receives the cartridges and presents them one at a time In front of the opening of the barrel As each cartridge is placed in position a ack ack- back Rotary Carrier Feeds the Cartridges ing block drops into place behind It it with a firing pin ready to explode the shell sheH as soon as the trigger Is pulled The carrier Is controlled b by bL a coiled spring which is wound when the magazine is filled and upon the discharge discharge discharge dis dis- charge of each shell its carrier drops out of position at the rear of the barrel barrel barrel bar bar- rel allowing the whole set of carriers to rotate and bring the next shell into place Benjamin F. F Perry of Grand Junction Junc Juno tion Col Is the the- i inventor Surface Tension of Liquids Lord Rayleigh R has for some time past been carrying out experiment re relative relative rel rel- to the tension of liquids This tension is Js at the maximum In pure water but by the application ofa ofa of ofa a small drop of oil or grease the tension tension ten ten- sion slon Is considerably reduced This fact may easily be demonstrated DY oy dropping a small piece of camphor into pure pure water when II it will rotate rapidly If It a drop of oil be now applied applied ap ap- applied plied to the water the rotary motion ceases Immediately According to to Lord Rayleigh a film of oil on water may maybe be so thin that its thickness Is no no morn mor more than the twenty five five millionth mil part of an inch which inch which Is computed computed computed com com- to be in all probability the diameter diameter diameter di di- ameter of a molecule of the oil Apparatus Apparatus for Testing Eyes To the lay mind the machine shown in the illustration may resemble a sausage stuffer stuffier but the Inventor probably probably probably ably had no such thought in his mind when he designed it to aid him in treating the eyes of his patients The object of this apparatus is to provide a treatment for that class of disease of the eye where nerve stimulation stimulation- crank or belt power are utilized to Stimulates the Nerves and Increased circulation ate are necessary necessary necessary sary In order to obtain beneficial re re- This object Is attained by changing the the- atmospheric ric pressure around the ey eye in n su such h a n. manner as to cause calse the eye to move move outward and inward In Inthe inthe Inthe the bony f Its socket the amplitude amplitude amplitude am am- of these movements and their rapidity being under complete control control control con con- of the operator An n ordinary cylinder add piston driven by either a obtain the necessary pressure and vacuum applying each alternately through gh the medi medium m of an eye-cup eye at atthe atthe atthe the end of a flexible tube attached to the cyll cylinder To vary the amount of pressure or vacuum inside the cylinder cylinder der del and its consequent action on the on the eye a valve on on the side of the cylinder cylinder cylinder der is arranged to open and close at each stroke of the piston with adjustment adjustment adjustment ad ad- to give the piston greater or orless less lesl movement before the valve Is opened or closed |