Farrow's military encyclopedia : a dictionary of military knowledge . an aggregate length of nearly 18 miles;there were 4 tubes in Liverpool ; 3 in Dublin ; .5 inManchester: 3 in Birmingham: and 1 in tubes, two or three inches in diameter, are ar-ranged for the reception of telegraph forms or pa-pers, made up into aroll, and put into a felt purpose is to economize time and expense inconducting the Government Postal Telegraph Inisi-ness by blowing along the telegraph forms at a rate of SOTiiles an hour, instead of sending them by streetconveyance. Two parallel tuljes
Farrow's military encyclopedia : a dictionary of military knowledge . an aggregate length of nearly 18 miles;there were 4 tubes in Liverpool ; 3 in Dublin ; .5 inManchester: 3 in Birmingham: and 1 in tubes, two or three inches in diameter, are ar-ranged for the reception of telegraph forms or pa-pers, made up into aroll, and put into a felt purpose is to economize time and expense inconducting the Government Postal Telegraph Inisi-ness by blowing along the telegraph forms at a rate of SOTiiles an hour, instead of sending them by streetconveyance. Two parallel tuljes have been laiddown beneath the pavements of the streets from theGeneral Post Office to various parts of London, andalso in some of the large provincial cities and towns;additions being made to tlie length of tube accordingas the system liecomes practically developed. Onetube in eacli pair may be called the down line, theother the iip ; the two are placed in connection ateach end, and one steam-engine work:? them felt cylinder very nearly fiUs up the tube,. Bift. 8. PNEUMATIC DRILL. 547 PNEUMATIC DRILL. bill, still moves ciisily along it; this movciiieiil isbniiiiilit about cither by tlio fonimtioii of a par-tiid vacuum in front of the cylinder, or byconiprcss-jni; tile air behind it; and tlio Hleam power is so a|).plied as to ])rodiice either or but h of these two results,acc<irdini; as convenience may sui;i;est. An inj^en-ious plan isadopleil foraccoinmodaliin; one or moreiiilcrmediate ollices, just as local stations are ac-CMinmodalei! between thi^ two termini of a cylinder or m/vvV;-travels from end to end ofthe tulic, unless a block or check action is puriioselyput in force at an intermediate station; and the modeof clfectini; this is one of the most beautiful of inventions relatini? to the subjecl. Twopieces of l)ipe, the mv/cf/-and the trniismith r, aremad(^ exactly alike, and are so jiivoted toijetlier thatcither may be adjusted into a
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Keywords: ., bookcentury1800, bookdecade188, booksubjectmilitaryartandscience
