Show miscellany tt it Is not to the calendar that we huia so go to abid out the exact date of beginning says bare rev theodore wood the naturalist but jw to tho the birds and the spiders pl dr who indicate the th varying t time me with infallible ti nis own p pet t wlater prop ah I 1 Tiet st te if jbf tb of the fam hup briw reddish brown hue with a broad choca chocolate running down its back for I 1 three long years these odorous creatures inhabit the trunks of willow trees boring their way backward and forward through the solid wood and making a light but sufficient meal on the wood which they cut away during that period they increase some times in bodily weight a ratte rate of increase which would convert the 10 pound human baby into a monster of about tons and then always in the first week in autumn they leave the tree forever and wander forth on an the halings palings in search of a secluded nook wherein to turn to chrysalides chrys allds probably the most compact heat engine ever attempted to is that driven by carbon dioxide A horizontal motor of this kind exhibited by mr W F roberts to the franklin institute had bad a b ed 24 by 14 inches in size and a total weight of only 85 pounds yet it was claimed that the engine could develop 25 horse power running at 2000 revolutions per minute under a pressure of 1500 pounds per square inch the carbon dioxide was contained in liquefied form farm in steel cylinders and was heated on its ita way to the engine in a sm small all coil ot of copper pipe the later researches of surgeon ross rosa of the british army have not only proved that malaria can be acquired from a mosquito bite but that the malaria parasite is mostly one of insects and only an occasional visitor to man particular species of malaria parasites parasia es even demand particular species of mosquitoes a fact at least partly explain ing apparent vagaries in the dis distribution of varieties of malaria when all 1 is known europeans may be able to live in climate s now made deadly by this pest the new primary battery of an claimed to be a cheaper source of electric energy than any other primary battery yet devised lass has a negative Alve pole of zinc and a positive plate of spongy lead like the negative of a lead accumulator the lead plates are prepared tor for use by oxidizing in the air and charging with sulphate of lead in dilute gulph sulphuric uric acid the necessary emary acid for electrolytic action la in contained in the positive plate in the form of inert sulphate of lead and fin ln in a fluid of water containing a little atile sulphate of zinc there is no do action on open circuit the sulphate of lead being reduced to metallic lead and the zinc dissolved when the circuit to Is closed the positive plates are recharged by exposing to the air and then sul Is in the add acid the retaining cells are rectangular boxes of tinned iron and these are protected from froin corrosion by the zinc plates to them the awtery resembles the Datt lell cell la in constancy the pure w waiter distributed to the inhabitants habitants ts of to Is that of the bruges caval camal after filtering through beds of gaind and then subjecting its sterilizers to an am electric current nt ait a pressure of 1000 volts all traces braces of microbes mic robes are destroyed the electrical plant hats has a capacity of about 66 65 horse home power and about cubic feet of water per day are treated a summer and in winter 1 Gel Gela told a mixture of with formaldehyde to Is being used for unbreakable goggles to protect the eyes of workmen exposed to part particles teles of abone metal or wood ape colony Is almot arl tad forests covering agy acres or a little won more than a quarter of one ame per acut of tb h toma am r of ij th oo 00 6 tafv M U oatt ma britain Brita tn and ireland 4 pw per cent the need of cape colony Is IB emphasized by the heavy importation of wood and the of forests urges that tree plant lations be formed wherever the wa am nual ra intall exceeds 16 inches french violin makers report that aluminum when used for stringed in produces a richer sound thaul wood espe especially dally with the higher notes motes and the experiments with the diew nHa teHal lal have been en entirely tilrey successful cess ful one of the products of the new chemistry opened up by the electric furnace is pure metallic calcium M henri marissan doissan finds chaton that on gently heating this in an atmosphere of nitrogen trogen nl the two combine the reaction becoming so violent at a dark red heat that the whole mass is raised to incandescent the resulting nitride of calcium is another remarkable new substance it seems seema to contain con tain two atoms of nitrogen to three of calcium its specific gravity is s and it melts at about 2600 deg P F A surface coating of it la Is found to give the yellow color usually described as belonging to the metallic calcium the pure metal being quite white the most remarkable property of the nitride Is its reaction with water which results in the production of anenia in exactly the same manner that acetylene is formed from calcium carbide this reaction M mols mods san believes may become industrially important when the isolation ot of metallic calcium in the electric furnace is sufficiently cheapened A problem for scientific men and aid mechanics has been raised by a british committee on dangerous trades the use of beds of lead by file cutters is EL a frequent cause of lead poisoning and not less than seventy four cases have been reported in one district during the last three years A substitute for lead as a rest for the files in hand cutting is what is wanted paper has been used in germany for ight haht work oday clay and find sand enclosed in canvass wood copper vulcanite and various compounds of rubber and gutta percha have been tried and discarded and zinc and pewter are too hard bard A curious experience is related by a physician of mendon france to examine the throat of one of his children he held a lighted candle before its open mouth and placed the handle of a spoon on the base of the tongue when there was a sudden flash of blue flame from the throat and the doctors slightly burned it is explained that the spoon probably produced a slight retching which brought a little inflammable gas from the stomach osmium threads for incandescent electric lamps giving a very brilhante bril Hant Vant light have been pat tented in III germany the threads are hollow the estum being coated on a thin copper wire which is evaporated at a hight bight temperature empera ture |