Farrow's military encyclopedia : a dictionary of military knowledge . linally ilie force of recoil is overcome and the top-carriage is brought to a state of rest. The shock ofrecoil is to a great extent absorbed without suddenstrain to the carriage. The top-carriage must beout tif (/ear whenever the piece is discharged: it thenniovis on the chassis with slidingfriclion. This, to-gether with the inclination of the chassis-rails, assistsin cheeking the recoil. When the carriage isingoodrunning order, it generally runs forward a short dis-t;ince liy the reaction of the compressed air after re-coi
Farrow's military encyclopedia : a dictionary of military knowledge . linally ilie force of recoil is overcome and the top-carriage is brought to a state of rest. The shock ofrecoil is to a great extent absorbed without suddenstrain to the carriage. The top-carriage must beout tif (/ear whenever the piece is discharged: it thenniovis on the chassis with slidingfriclion. This, to-gether with the inclination of the chassis-rails, assistsin cheeking the recoil. When the carriage isingoodrunning order, it generally runs forward a short dis-t;ince liy the reaction of the compressed air after re-coil. To run the piece in top-carriageis thrown into gear; it then moves forward, the airis compressed in front of the pistons, and. escapinggradually through lhf thecylinders, allows the carriage to move forward witha gentle motion. The weiglit of the air-cvlinderswith attachments is about oOOO pouuils. See lHydraii-lir liifftr. PNEUMATIC DISPATCH.—This name is given to amode of sending parcels, mail-bags, or telegram pa-. HBiliiaJllkdESilliilia I-i.;. 1. pers through a tube by atmospheric pressure, or by apartial vacuum. Earl_v in the present century, conceived the idea of some such contriv-ance, lie proposed to construct air-tight tunnels,with carriages moving through them on rails; andthese carriages were to be propelled by compressed menced in 1H(!4 the construction of a tube ona larg-er scale, and this has since been completed. Thetube has been laid down from Euston Square to ;Iartins-le-(!rand. by way of Tottenham Court Road,Holborn, and Newgate Street—over a distance of 2ymiles The tube is of large size, nearly 4J feet indiameter, laid down at as small a depth fieneath thecarriage-way of the several streets as the water andgas pipes will permit. It is chiefly of cast-iron: butsome portions on a sharp curve are of brick. Thereis a large engine-house on the south side of Holborn,near Lmcolus Inn Fields, to sui)ply all the powerfor working the
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Keywords: ., bookcentury1800, bookdecade188, booksubjectmilitaryartandscience
