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Show His calculations are curious and give the work of tho heart in miles and beats. It is bused upon the presump-1 tiou that the heart bents 60 times each ! minute and throws blood nine feet. Computed thus, the mileage of the blood through the body might bo taken as 207 yards per minute, 7 miles per hour. 10 miles per dav, 62.320 miles per year, o 4.292,400 ini'les a lifetime of seventy years. At a oertaiu Berlin cafe the lighting and veutilatiou are effected by means of electricity. In the center of the room there are soveral large glass jars through which passes a platinum wiro in spiral form. Tho electricity, on heating the wire, speedily raises tho temycrature of the water in tho jars to boilingpoiut and prepares the coffee in tho sight of everybody. Lastly, a small electric railway transmits tho coffee to the various tables, so that the guests may help themselves to their liking. A school boy iu Edinburgh scalded his left leg and foot from knee to toes so badly that the skin peeled off aud tho Uesh ulcerated. There being no signs of healing, the surgeon obtained a greyhound puppy, seven days old, chloroformed it to death, shaved its body rlosely, skinned it and with the skin grafted the skin of tho boy so as to cover all the ulcerated spots. The result was surprising, Tho leg rapidly healed, and when the patient was discharged dis-charged "the color of tho grafted skin was uniform and very similar to that 'of the normal skin." A novel mcttod of ridding steamboats steam-boats of rodents has been successfully tested at Pittsburg. Tbo youngest son of tho captain of a river steamer was some time ago presonted with a pair of spotted snakes, which, as they were perfectly harmless, wero deposited iu tho hull of the boat until they could be conveniently housed A few days ago a great commotion was noticed among the rats which always infest steamboats and barges in great numbers, and huudreds of thorn . were observed scampering ashore on the handspring and stern lines. Tho evacuation continued all night and in the morning the captain found both snakes dead, having been literally torn to pieces by tbo iufuri-lod iufuri-lod animals, but not one of the latter was found on tho bout. CLU'PKU AND CONDENSED. The crowding of the tenement houses In New York city, where the sweating cystem of work is in vouc, is disgnu'c-it'll. disgnu'c-it'll. The titate inspectors declare that it is now worse than ever before, on account, of the great number of Polish and Russian Hebrews who have swarmed over certain parts of tho cast ,ide aud takeu po,scesiou of those trades in which the sweating system is practiced. The, French lisberincn are troubled by tlitt depredations of porpoises, for which l hey have not succeeded iu finding find-ing a remedy.' An attempt was made to catch tliein in seiito nets, but they .lumped out of the snares. They were Beared away by guns and torpedoes, but tho lish were fr gliteuecl aud disapeared with thorn. They are too numerous to be shot otic by one iu au eticulivo mau-ner. mau-ner. . Jeft're Johnson, w ho was at one time a slave, under tho laws of New York, is still living in Kings County, that btato. A bill of sale, si ill preserved, fhows that he was disposed of for .50 in 180!), and ho was then about nine years old. Two of his sons did good service in tho civil war, aud it is to tho further credit of tho old man that he ljever pused as the. body servant of Washington. ItisxVorth remarking that tho tier-iiianii tier-iiianii have never called Bismarck "Tho Iron Chancellor." Tho title is one of French or British invention. Bismarck was called dor Kiscrue Graf nt'tor the battle of Satlowa, and for years he was known only as "Tho Iron Count." Bui this title is said to have been given him in admiration for his uervo iu himself arresting Blinde, who tried to assassinate assass-inate him iu the open street. The excavation being pursued at Mag-alapolis, Mag-alapolis, iu tho Peloponnesus, under the British school of arohreology, have resulted re-sulted iu some interesting discoveries. Besides uncovering tho site of a Greek theater, the excavators have found in a tumulous a small cylinder sarcophagus, containing bones and to pieces of a gold oruamout simular to those discovered discov-ered by Dr. Schlicmann at Myceua? and elsewhere. M. de Malarco recently informed the French academy of science that tho use ' of the metric system had had iu 1887 become compulsory in countries haviug an aggregate population of 302,0011.000, beifig au increase of 5,000,000 persons obliged to use it iu ten years; use was optional in countries having ueaiiv 07,-000,000 07,-000,000 Inhabitants; aud it was legally admitted and partially applied in countries coun-tries haviug ou aggregate population of 31)5,000,000. Tho larynx of tho recently deceased tenor, Gayarre, has been preserved iu tho anatomical museum, Madrid, and it is said that the Spauish surgeons have licen struck by the fact that they found Gayarre's "voice box" unusually large ttnd the chords uue.veu. AU theories in regard to tho latter fact have, however, been upset by the dictum of a French expert, who declares the changes after death are so great that there is little difference between tho larynx of a tenor aud a street crier. The mathematical fiend has recently bpen at work upon a calculation of the w ork performed by tho huinau heart. |