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New Thames tunnel
2S0
.~'aifi"@ (!f" [)]#u~u~.ile ('acfc[(t.qC.~'.
[Jour.Frank. In<.,
Packing for Steam Pipes.--.l. l(athe makes a packing whh'h also may be used as a n(m-con(hmtor, for wrapping the pipes, by griuding 20 1)arts of Immp-rethse and mixing it in a Hollander with 41) parts asbestos, 20 parts wool-waste and 2() parts wood-pulp. The mass is then saturated with soluble glass and drled.--Di~¢yle/, .lo~trr~d. ('.
Prediction of Earthqu~kes.--J. Dehmney has/bnnd, by examining the tables of earthquakes from 1705 to 1842, four groups of maximum frequency which occur when Jupiter and Saturn are at the mean longitudes of 265 ° and lq5 °. He therefore predicts an unusual nmnber of earthquakes in the years 1886, 1891, 1898, 1900, 1912, 1919, 1927 and 1930.--Comptcs Ige~&ts. C.
0hlorophyll.--In 1877 Gautier prepared crystals of pure chlorophyll, and he has been studying its properties and affinities. A recent paper of Hol)pe-Seyler ha~ induced Gautier to announce his meth()d of removing dm impurities which vitiate most of the published observations. He finds nmnerous interesting resemblances to bilirubine and hematine, and anticipates, from fiu-thcr researches, results of great importance for vegetable physiohigy.--Comptes Rendus. C. New Thames Tunnel.--A tunnel has been authorized by Act of Parliament between (ireenwieh and Millwall, two districts which have an aggregate l)Opulation of 259,000 persons. When the ferryboats are interrupted bv the frequent tbgs, a detour of about twelve miles has to be made in m-der to cross bv way of London bridge, The new sub-way, which will be the fourth tunnel beneath the Thames, will be a third of a mile long, al>proaehed by a descent of fifteen steps at Millwall and by twentv-fimr steps at Greenwieh.--L'Tngem l)fic. C.
Safety of Dynamite Cartridges.--Louis Ronx savs that the transport of dynamite should be entirely prohibited except when divided into small cartridges. When such cartridges are surrounded by some mater'ial, such as sand or sawdust, which absorbs any escapiugliquid, perfect security may be obtained. In spite of the large quantity of dynamite manuihetured during the last few years, not a single accident has oecurred from transportation or storage. A box of dynamite cartridges may be let t-dl from a height great enough to break it, or crushed by the fall of heavy weighted, or placed between the buflbrs of colliding railroad cars, without producing an explosion.--Ann, du Gem Cir. C.
.~'aifi"@ (!f" [)]#u~u~.ile ('acfc[(t.qC.~'.
[Jour.Frank. In<.,
Packing for Steam Pipes.--.l. l(athe makes a packing whh'h also may be used as a n(m-con(hmtor, for wrapping the pipes, by griuding 20 1)arts of Immp-rethse and mixing it in a Hollander with 41) parts asbestos, 20 parts wool-waste and 2() parts wood-pulp. The mass is then saturated with soluble glass and drled.--Di~¢yle/, .lo~trr~d. ('.
Prediction of Earthqu~kes.--J. Dehmney has/bnnd, by examining the tables of earthquakes from 1705 to 1842, four groups of maximum frequency which occur when Jupiter and Saturn are at the mean longitudes of 265 ° and lq5 °. He therefore predicts an unusual nmnber of earthquakes in the years 1886, 1891, 1898, 1900, 1912, 1919, 1927 and 1930.--Comptcs Ige~&ts. C.
0hlorophyll.--In 1877 Gautier prepared crystals of pure chlorophyll, and he has been studying its properties and affinities. A recent paper of Hol)pe-Seyler ha~ induced Gautier to announce his meth()d of removing dm impurities which vitiate most of the published observations. He finds nmnerous interesting resemblances to bilirubine and hematine, and anticipates, from fiu-thcr researches, results of great importance for vegetable physiohigy.--Comptes Rendus. C. New Thames Tunnel.--A tunnel has been authorized by Act of Parliament between (ireenwieh and Millwall, two districts which have an aggregate l)Opulation of 259,000 persons. When the ferryboats are interrupted bv the frequent tbgs, a detour of about twelve miles has to be made in m-der to cross bv way of London bridge, The new sub-way, which will be the fourth tunnel beneath the Thames, will be a third of a mile long, al>proaehed by a descent of fifteen steps at Millwall and by twentv-fimr steps at Greenwieh.--L'Tngem l)fic. C.
Safety of Dynamite Cartridges.--Louis Ronx savs that the transport of dynamite should be entirely prohibited except when divided into small cartridges. When such cartridges are surrounded by some mater'ial, such as sand or sawdust, which absorbs any escapiugliquid, perfect security may be obtained. In spite of the large quantity of dynamite manuihetured during the last few years, not a single accident has oecurred from transportation or storage. A box of dynamite cartridges may be let t-dl from a height great enough to break it, or crushed by the fall of heavy weighted, or placed between the buflbrs of colliding railroad cars, without producing an explosion.--Ann, du Gem Cir. C.