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Show SCIENTIFIC NOTES. RAINDROPS' A fellow of the Bayal Meteorological soicaty, Mr. E. J. Lowe, has tab n the pains to make over 300 sketches of rain-drops, rain-drops, and has colleoted some curious information. Xhe dropa were allowed to fall on sheets ot slate ruled in inch squares, anu were copiea on paper 61ml-1 larly ruled, Sume drops prodoe awt't circular spot; others, failing w.ith greater force, ha gashes iroundl them. DiflerW - o m sam(J eiz9 vary mv in the amount xt watgj ,0Btaiued. Tbe size ranges frcm lieet invlsable minuteness ta two inches in diameter. Occasionally large drops fall that must be more or lejg hollow, hol-low, as they fail to wet the enW re surface sur-face enclosed within their circmnfrence. RC9T OF BAILS. The mating of rails, especially in the sulphurous air of long tunnels, forms a not unimportant item of railway loss-In loss-In tha Altemberg tunnel, which is 1,230 feet long and located on a enrve of 2,9s0 feet radins, the raiU bad been laid 11 years, and were fonnd to be covered with hard scales of iron sulphide to a depth of 0.16 to 0.24 inch. The weight of the rails had been much reduced, although al-though their thickness had Increased on account of tho flaklnesii .of the rnst. The new rails are now painted every six months -with a prolecteve tar mixture, la tne Erandleite tunndl, about 10,000 feet long and on a ono per cent grade tha rails depreciated as much from rust as from wear, anil metal ties lose an average of a pound a year. i HOW IT FEELS TO FALL. The experience of many persons who have undergone all the sensations o I |