| Show scientific miscellany tests teats on a 3 inch line shaft 80 feet r long running at revolutions a minute are reported to have shown a pow t er consumption of 6 21 horse power N T f with boxes and of only 3 01 u horse power after change to roller bearings f A singular accident has been report ed from a chemical factory where a workmans work mans clothes became saturated IP with dust from the grinding of chlor kte dite of potassium A spark from the t workmans Work mans pipe fell on the clothes PV sf r when the entire suit instantly flashed into flame producing fatal burns t floors are made in france from a mixture of six parts of good plaster y with one pirt part of freshly slacked lime s this Is hardened when very dry by thorough saturation with sulphate of iron or zinc the former giving a sur face twenty times as strong as oraf f nary plaster while the latter is chosen lar its whiteness linseed oil boiled with turns the rust color given by the iron to fo a beautiful mahogany I 1 aich which Is further improved by a coati coat of copal varnish electrical machinery operated by 7 tone one man map Is applied to the ringing of mhd three great bells of the church of s f ot t georke berlin A motor of ten 1 horse hirae horsepower power gives revolutions per 1 minute to a shaft on which are three caf drums each having at its side y IL friction wheel fixed to the shaft i pressure of the wheel against the drum r causes see both to revolve A rope on the acts on the bell lever and as the w pell 1 reaches tle the middle of its swing 1 aa eccentric releases rel enaes the drum and al iowa aws the bell to ring back A parts ice fee company now obtains y cijka loop supplies plies from the glacier du casset P Y wear I 1 briancon Br lancon the foot of the glacier g 18 10 fee feet abbe sea level end and the SOO 30 tb blocks 0 of ice are carried to a matian 1400 feet lower by a telpher wib lne teet beet long the loaded cars or boxes on this line pull up the empty f ones no engines being required the oars bring down howly hourly about ten tons sf pt IC I ice C which Is carried in carts from the lower station to a railway about eleven V miles away unexplained photographic reversal shows lightning in camera ay as a dark track instead of a 11 stilt one experimenting with electric wg t mr W A clayden an ittig Itt english meteorologist has imitated the US by having a strong white back ground and giving the plate extra ex to diffused light after the elec altet t t discharge the most curious re v t ts to that the reversal does not take place la it if the exposure to diffused light VS given ven before the electric spark discharge A au tl scientific development of the beoo potato as a food seems seema to have been gely neglected according to M lawandi a french chemist who has anade known some interesting facts thin slices held toward the light or V p hed with roentgen rays show 0 o that the potato aside from the am consists of three layers dimin lulng in ln thickness toward the center T the 0 o armost layer containing the X i w greatest at pro proportion of starch and least gf of nitrogenous it g 1 matter while the innermost layer Is richest in nitrogenous substance and poorest in starch the outside layer is driest the inside marrow having considerably more water on the average 75 per cent of the po tatos weight is water 20 per cent is starch and 2 per cent is nitrogenous matter but the proportions vary so greatly that the food value of the best table potatoes may be three times that of the poorest chemical analysis however is not necessary for a relative estimate of different varieties potatoes crack open in hot water because they are deficient in albumen not as has been supposed on account of the swelling of the starch and those remaining whole on boiling are the ones that contain most albumen or nitrogenous matter and are the most nutritious two kinds of ill III effects are produced on the eyes by the electric arc according of prof A J rowland when ones field of vision takes in such ah are arc as the ordinary are arc lamp an accidental short circuit or the break of a large current at high potential the eyes suffer a sort of paralysis and on looking away one sees as through a fog the effect is transient at the worst being cured by a day or two in a dark room on working near area arcs currents especially it if one electrode la Is metal more serious harm may be done an external burn like a sunburn being produced on the conjunctiva or outer membrane covering the front of the eyeball this is less likely to occur at night than in the daytime when the glare of the arc gives less conspicuous warning the effect may not be noticed for hours and is first perceptible as a slight scratching followed by a sensation of dryness on the eyeball shedding of tears and in bad attacks an intense aching and blindness protection against the eye burns can only be secured by a mask covering the entire face with glasses of special design the sanitary stamping out of y yellow ellow fever which has its source in cuba and is often brought thence to the southern states is suggested as a possible result of the americanizing American izing of the pearl of the antilles whether the hope is justified or not the disease may be expected to 9 give ive the invading army trouble during the coming summer interesting in this connection are dr San Sam arellis efforts in brazil to find a specific treatment and his latest report gives much encouragement showing a mortality under his immunized serum injections af 5 in 22 cases whereas the usual mortality in average epidemics at the brazilian capital is about 50 per cent with further experience and an abundant supply of more active serum erum than is now adaila available b ae he looks for better results As animals do not readily tolerate strong ng doses of the virus difficulty to Is experienced in supplying a trustworthy curative cyra curative tive and preventive serum but this has been usually obtained by intensive treatment of horses for 12 to 14 months the serum acts only against microbes mic microbes mic robes not against their toxins it is therefore effective only I 1 at an early stage of the disease and is useless when the poison formed in the body of the patient has reached a fatal quantity in an air investigation described by Mel anjer a french meteorologist observations with an aitken dust counter were made in finland the sahara and elsewhere it was found that the dust particles in the air increase in number with the dryness being usually at a minimum in the afternoon ter noon winds from land carry more dust that those over water and th those ose blowing from an area of high barome aarom ter or down high mountains are very dusty products of combustion furnish part of the dust causing fog and rain dust particles are effective in causing rainfall but whether there can be rain without them Is an important problem lern yet to be solved |
