| Show kunf n foiw ass jowo jf Wo iCKs stir vm JL SU OPTICAL PHENOMENA EtIA two tiro sini to III of the zane kari avith avill ch tho 13 ia 0 may io 1 0 o deceli ell take three strips of i bite capt r la ghonim in fix fig 1 of langl but if one ol of them thein I twins aang only halt half the width of tle the uther other cross cross the to broader strips strip like an all X and aid at their point of fliter intersection section I 1 k M 1 1 ar ax el W no I 1 or OF mr EYE place ili an upright position the narrower strip it will appear longer than the others and aliel you will anve to ate by actual measurement that they are arc nil all alike in ili length before you yott will bo be able to convince tile the spectators of the fact act the illusion which it n sufficiently striking even cven in tile the illustration will be found excie n tinted with pieces of w u bite paper laid on oil it 11 bleick ground P per or c loth Ls may be most convenient if oil oi tile the other hand you form with your three strips a fig figure urcin in the share shape of tin an 11 II tho the narrow strips forming fo tho transverse bar between the hie two wille wide and then turu turn this strip round on oil it center so its as to lie diagonally between them ai shown iu in the illustration this strip will now than the tio trips though it is as ve u enow of exactly the samo belig th a tt mw Q A I 1 at 5 FIG 11 II ILLUSIONS or hiir ETE thus by reason of this curious illusion luion il to which the eye is subject and which may well deceive tiny liny person a strip str ip 0 of paper exactly corresponding in length with two others may be made to appear either longer or shorter thin than they according to the lelath c positions given to them latoral select ion at fault wo we are gerc generally rally told by orthodox c dar that both the structure and tho the actions of animals are to a great extent exten t dependent upon natural i election ambor any organ or any baliet bich is not advantage advant advantageous ag deou to its species will lie be it I 1 is said promptly suppressed a as it possible danger or at least art an demand but a correspondent of science declares that there area are afew few cases of habits which seem tolia e been acquired or maintained in flat contradiction to this doctrine lie ile mys frays every one knows that the telida feli tIm from the llan 11 en gal tiger down to our domestic mouser tt i lien hen they hai ha c liezer a u prey do not fit at once kill anil and devour it but either torment it or at least sit and watch it for some time tima before administering the fatal bite or blow the consequence is that the abo victim sometimes esca escapes peg as wo all have hava witnessed when pussy is playing with a 0 mouse one instance at least is ia on record where aber e a man struck down by a tiger quietly lui etly drew a dagger and stabbed tho the assailant to the heart this could not hae hax oe been done with a aza st of prey 0 of the canine or ursino ursine family as la they do not allow time for du do rising and executing sach a maneuver hence we see that the peculiar conduct con luct of the cats is ia to themselves and we ask why it lias his not been abandoned certainly any cat which should at once devour any mouse or bird which it bad caught would in ia times of scarcity have a decided advantage over its fellow cats similarly injudicious Is the conduct of the domestic hen bell As hoon boon as site has leal laid aneg an egg she at once announces the tact fact to ull nil whom it may concern by her well known cackling ackling e what benent benefit is this outcry to herself or to her species on the contrary the outcry is hoard heard by animals which are given to caling siti st aling eggs anti and is understood by monkeys monkey it if wo we may accept the evidence of la ia I a vaillant there again therefore there fole wu we have haro it a line of conduct quite contrary to a N hat bat natural sc selection lection would determine ms colored ceail I 1 mr george F P kunf kun the well known gem expert has expressed himself hImL lf in ili regard to alie popular that pearls become sick and lusterless from bring unworn and may bo be restored by joakin soaking them in tho the sea the theory is not founded in fact and the soaking will not help the pearls unless aliey were in a pearl oyster recci vini now layers of dacre othar o a dish of salt water would 1 l Is i ag as aswell atvell its as tho sea boa mr K 1 inz that pearls which have become yellow ali rough absorption of 0 grease be cleaned with a little carbonate of soda orris root or by bleaching in the sun cordent Cini Cor nent for a good vi which bich completely resists the solvent action of water the I 1 loro lloro review rives gives the fol lowine form ula prom from 5 to 10 parts of pure dry gabla tin are dissolved in parts water to tho the sol solution lution is added about 10 pet per cent of 0 concentrated solution of ot of potash the liquid is kept in the dark when articles joined NN with ith this cement dt are exposed to light the gt litin fifie is acted upon the being partly reduced anil and I 1 alio lie film ot of tho the czmut becomes beconi ea tough and durable an electrical colu counter an electrical machine in u uc o at the lon dun mint Is said not only to count comit coins but to immediately detect and register reKi ater coins doing the work lurcoo tot foie e pel fut wed by three or four ah aiila Is |
